coating systems sn 274-2 requirements

October 2017

Coating systems

Requirements SN 274-2

ICS 87.040 Supersedes SN 274-2:2016-05

Table of contents Page

1 Scope ............................................................................................................................................................. 1

2 Normative references ..................................................................................................................................... 2

3 Terms and definitions ..................................................................................................................................... 2

4 Basic specifications ....................................................................................................................................... 2

5 Requirements ................................................................................................................................................. 3

5.1 Coating systems ............................................................................................................................................... 3

5.1.1 Basic specifications .......................................................................................................................................... 3

5.1.2 Permanent corrosion protection ......................................................................................................................... 3

5.1.3 Permanent anti-slip corrosion protection ............................................................................................................. 5

5.1.4 Temporary corrosion protection ......................................................................................................................... 6

5.2 Coater ............................................................................................................................................................. 7

5.3 Coating material producer ................................................................................................................................. 8

6 Examination specifications ............................................................................................................................. 9

6.1 Laboratory testing ............................................................................................................................................. 9

6.1.1 Basic specifications .......................................................................................................................................... 9


6.1.3 Temporary corrosion protection ......................................................................................................................... 9

6.2 In-process examination by the coater ................................................................................................................. 9


6.2.2 Temporary corrosion protection ....................................................................................................................... 10

6.3 Acceptance inspection of the finished coat ........................................................................................................ 10

6.3.1 Basic specifications ........................................................................................................................................ 10

6.3.2 Permanent corrosion protection ....................................................................................................................... 10

6.3.3 Temporary corrosion protection ....................................................................................................................... 10

Annex A (normative) - Colors used in the coating systems....................................................................................... 11

Annex B (informative) - Data of the coating material producer .................................................................................. 12

Annex C (normative) - Record of in-process supervision by the coater .................................................................... 13

Annex D (normative) - Coat acceptance examination records ................................................................................... 14

Annex E (informative) - Explanation of binder short designations ............................................................................. 16

Annex F (informative) - Juxtaposition of coating system designations ..................................................................... 17

Amendments .......................................................................................................................................................... 18

1 Scope This company standard specifies for SMS group the requirements made on the coating systems (CS) for temporary and permanent corrosion protection of components in steel, cast steel and cast iron, on coaters and coating material producers, and the examination specifications.

Number of pages: 18

Edited by: SMS group Standards Office

© SMS group GmbH 2017 "The present document is protected by copyright. The reproduction, distribution and utilization of this document

as well as the disclosure of its content to others are allowed in connection with SMS group projects and products. Any violations will be prosecuted under criminal law and will result in an obligation to pay damages.

All rights reserved.”

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SN 274-2:2017-10

2 Normative references

The following documents are required for the application of this standard. Dated references refer only to the edition of the date indicated. Undated references refer to the most recent edition of the respective document inclusive of all revisions.

SN 200-1 Manufacturing instructions; Requirements and principles

SN 200-7 Manufacturing instructions; Corrosion protection

SN 274-1 Coating systems, Terms, designation composition, selection and indications in the manufacturing documents

DIN EN 59 Glass-fibre reinforced plastics - Measurement of hardness by means of a Barcol

impressor

DIN EN ISO 2178 Non-magnetic coatings on magnetic substrates – Measurement of coating thickness -

Magnetic method

DIN EN ISO 2360 Non-conductive coatings on non-magnetic electrically conductive basis materials –

Measurement of coating thickness - Amplitude-sensitive eddy current method

DIN EN ISO 2409 Paints and varnishes - Cross-cut test

DIN EN ISO 2808 Paints and varnishes - Determination of film thickness

DIN EN ISO 2812-1 Paints and varnishes - Determination of resistance to liquids - Part 1: Immersion in liquids

other than water

DIN EN ISO 2812-2 Paints and varnishes - Determination of resistance to liquids - Part 2: Water immersion

method

DIN EN ISO 3882 Metallic and other inorganic coatings - Review of methods of measurement of thickness

DIN EN ISO 4624 Paints and varnishes - Pull-off test for adhesion

DIN EN ISO 4625-1 Binders for paints and varnishes - Determination of softening point - Part 1: Ring-and-ball

method

DIN EN ISO 6270-2 Paints and varnishes - Determination of resistance to humidity - Part 2: Procedure for

exposing test specimens in condensation water atmospheres

DIN EN ISO 6272-2 Paints and varnishes - Rapid-deformation (impact resistance) tests - Part 2: Falling-weight

test, small-area indenter

DIN EN ISO 8503-2 Preparation of steel substrates before application of paints and related products - Surface

roughness characteristics of blast-cleaned steel substrates - Part 2: Method for the

grading of surface profile of abrasive blast-cleaned steel - Comparator procedure

DIN EN ISO 9227 Corrosion tests in artificial atmospheres - Salt spray tests

DIN EN ISO 12944-4 Paints and varnishes - Corrosion protection of steel structures by protective paint systems

- Part 4: Types of surface and surface preparation

ISO 6743-8 Lubricants, industrial oils and related products (class L); Classification - Part 8: Family R (temporary protection against corrosion)

Directive 1999/13/EC Limitation of emissions of volatile organic compounds due to the use of organic solvents in certain activities and installations

3 Terms and definitions

For the application of this document, the terms and definitions of SN 274-1 shall be used.

4 Basic specifications

The coating systems specified in the present standard shall be used for components made of steel, cast steel and cast iron and serve one or more of the following purposes: - Protection of the component against harmful influences of aggressive materials; - Protection of the contents of a vessel against contamination by soluble matter in the vessel material; - Achieving of a particular surface condition The coating systems specified herein are not suitable for components made of stainless steel.

SN 274-2:2017-10

5 Requirements

5.1 Coating systems

5.1.1 Basic specifications

For permanent corrosion protection as in 5.1.2 and 5.1.3, adhesive strength with a cross-cut characteristic of 0-1 according to DIN EN ISO 2409:2013-06 after 0 load hours is required. For the respective assessment of the condensation water resistance according to DIN EN ISO 6270-2:2016-09 AT, salt spray test according to DIN EN ISO 9227:2017-07-NSS and resistance to chemicals according to DIN EN ISO 2812-1:2007-05 of the coating systems in 5.1.2 and 5.1.3, the values specified in the tables1 to 3 shall be complied with.

Table 1 – Assessment of condensation water resistance

Assessment Value

Visual assessment a)

0

Degree of blistering b)

S 0

Cross-cut c) 1-2

a) According to DIN EN ISO 4628-1 (0 best value, 5 worst value)

b) According to DIN EN ISO 4628-2 (S 0 best value, S 5 worst value)

c) According to DIN EN ISO 2409 (0 best value, 5 worst value)

Table 2 – Assessment of salt spray test

Assessment Value

Degree of rusting a)

Ri 0-1

Degree of blistering b)

S 0

Cross-cut c) 1-2

Delamination d)

1 mm a)

According to DIN EN ISO 4628-3 (Ri 0 best value, Ri 5 worst value) b)

According to DIN EN ISO 4628-2 (S 0 best value, S 5 worst value) c)

According to DIN EN ISO 2409 (0 best value, 5 worst value) d)

According to DIN EN ISO 4628-8 (partial scraping off with knife)

Table 3 – Assessment of resistance to chemicals

Assessment Value

Degree of blistering a)

S 0

Cross-cut b)

1-2 a)

According to DIN EN ISO 4628-2 (S 0 best value, S 5 worst value) b)

According to DIN EN ISO 2409 (0 best value, 5 worst value)

5.1.2 Permanent corrosion protection

Tables 4 to 7 specify the requirements made on the coating systems (CS) for permanent corrosion protection.

Table 4 – Requirements on the CS for permanent corrosion protection (resistance to water)

Coating system (CS)

Te

mp

era

ture

res

ista

nc

e

Co

nd

en

sati

on

wate

r re

sis

tan

ce

AT

Sa

lt s

pra

y

tes

t

Explanation on the

coating system

°C h a)

h b)

P.I.W.1.+120

Up to +120

120 240

- Permanent corrosion protection (P), - No climatic influences (I), - Loading through short-time influence of water on the

component surface (W.1.), - Ambient temperature up to +120 °C (+120)

P.A.W.1.+120

480 720

- Permanent corrosion protection (P), - Full climatic influences (A), - Loading through short-time influence of water on the

component surface (W.1.), - Ambient temperature up to +120 °C (+120)

P.I.W.3.+40 Up to +40

- Permanent corrosion protection (P), - No climatic influences (I), - Loading through permanent influence of water for an unlimited

duration (W.3) - Ambient temperature up to +40 °C (+40)

a) According to DIN EN ISO 6270-2, AT = alternating condensation-water atmosphere with changing air temperature

b) According to DIN EN ISO 9227

SN 274-2:2017-10

Table 5 – Requirements on the CS for permanent corrosion protection (resistance to chemicals in general)

Coating system (CS)

Te

mp

era

ture

res

ista

nc

e

Co

nd

en

sati

on

wate

r

res

ista

nc

e

AT

Re

sis

tan

ce

to

ch

em

ica

ls

Sa

lt s

pra

y

tes

t

Explanation on the

coating system

°C h a)

h b) c)

h d)

P.I.O.2.+120 Up

to +120

120 168 240

- Permanent corrosion protection (P), - No climatic influences (I), - Loading through permanent or frequent influence of organic

chemicals (e.g. mineral oils, aromatic and aliphatic hydrocarbons, alcohols, phenols etc.) (O.2.),

- Ambient temperature up to +120°C (+120)

P.I.A.2.+150 Up

to +150

480 168 720

- Permanent corrosion protection (P), - No climatic influences (I), - Loading through permanent or frequent influence of Inorganic

chemicals (e.g. inorganic, oxidizing and non-oxidizing acids, bases, salts etc.) (A.2.)

- Ambient temperature up to +150 °C (+150) a)

According to DIN EN ISO 6270-2, AT = alternating condensation-water atmosphere with changing air temperature b)

According to DIN EN ISO 2812-1 c)

The chemicals used (oils, greases, acids, emulsions etc.) can be found in the manufacturing documents. d)

According to DIN EN ISO 9227

Table 6 – Requirements on the CS for permanent corrosion protection (resistance to mineral oil)

Coating system (CS)

Te

mp

era

ture

res

ista

nc

e

Co

nd

en

sati

on

wate

r

res

ista

nc

e

AT

Res

ista

nc

e t

o

ch

em

ica

ls

Sa

lt s

pra

y

tes

t Explanation on the

coating system

°C

P.I.O.3.+80 Up to +80

168 720

- Permanent corrosion protection (P), - No climatic influences (I), - Loading through permanently hot mineral oil (O.3.), - Ambient temperature up to +80 °C (+80)

P.I.O.3.+100 Up to +100


P.I.O.3.+150 Up to +150


a) According to DIN EN ISO 6270-2, AT = alternating condensation-water atmosphere with changing air temperature

b) According to DIN EN ISO 2812-1

c) According to DIN EN ISO 9227

SN 274-2:2017-10

Table 7 – Requirements on the CS for permanent corrosion protection (resistance to heat)

Coating system (CS)

Te

mp

era

ture

res

ista

nc

e

Co

nd

en

sati

on

wate

r

res

ista

nc

e

AT

Re

sis

tan

ce

to

ch

em

ica

ls

Sa

lt s

pra

y

tes


coating system

°C

P.I.K.0.+400

Up to +400

120

-

240

- Permanent corrosion protection (P), - No climatic influences (I), - No influencing substances on the component surface (K.0.) - Loading through elevated ambient temperature up to +400 °C

(+400)

P.A.K.0.+400 120 240

- Permanent corrosion protection (P), - Full climatic influences (A), - No influencing substances on the component surface (K.0.) - Loading through elevated ambient temperature up to 400 °C

(+400)

P.I.K.0.+600

Up to +600

120 -

- Permanent corrosion protection (P), - No climatic influences (I), - No influencing substances on the component surface (K.0.) - Loading through very high ambient temperature up to +600 °C

(+600)

P.A.K.0.+600 120 -

- Permanent corrosion protection (P), - Full climatic influences (A), - No influencing substances on the component surface (K.0.) - Loading through very high ambient temperature up to +600 °C

(+600) a)

According to DIN EN ISO 6270-2, AT = alternating condensation-water atmosphere with changing air temperature b)

According to DIN EN ISO 2812-1 c)


5.1.3 Permanent anti-slip corrosion protection

Table 8 specifies the requirements made on the coating systems for permanent anti-slip corrosion protection.

Table 8 – Requirements on the CS for permanent anti-slip corrosion protection

Coating system (CS)

An

ti-s

lip

cla

ss a

)

Te

mp

era

ture

res

ista

nc

e

Co

nd

en

sati

on

wate

r

res

ista

nc

e

AT

Res

ista

nc

e t

o

ch

em

ica

ls

Sa

lt s

pra

y

tes


coating system

°C

PR.12.I.O.2.+100 R12 Up to

+100 120 - 240

- Permanent anti-slip corrosion protection (PR), - Anti-slip class (12.), - No climatic influences (I), - Loading through permanent or frequent influence of

organic chemicals (e.g. mineral oils, aromatic and aliphatic hydrocarbons, alcohols, phenols etc.) (O.2.),

- Ambient temperature up to +100 °C (+100) a)

According to DIN 51130 b)

According to DIN EN ISO 6270-2, AT = alternating condensation-water atmosphere with changing air temperature c)

According to DIN EN ISO 2812-1 d)

The chemicals used (oils, greases, acids, emulsions etc.) can be found in the manufacturing documents. e)


SN 274-2:2017-10

5.1.4 Temporary corrosion protection

Table 9 specifies the requirements made on the coating systems for temporary corrosion protection.

Table 9 – Requirements on the CS for temporary corrosion protection

Coating system

(CS)

Te

mp

era

ture

res

ista

nc

e

Sa

lt s

pra

y

tes

t

Co

nd

en

sa

tio

n

wa

ter

res

ista

nc

e

CH

Explanation on the

coating system

°C

T.I.W.1- L.K.0.+40

Up to +40

- 460

- Temporary corrosion protection (T),

- No climatic influences (I), - Loading through short-time influence of water on the component surface

(e.g. splashes, fumes, condensation) (W.1),

- Limited climatic influence (L.), - No influence of substances/liquids on component surfaces.(K.0.), - Ambient temperature in indoor and outdoor storage up to +40 °C (+40).

T.I.W.1 - L.W.1.+40 150 500


- No climatic influences (I), - Loading through short-time influence of water on the component surface

(e.g. splashes, fumes, condensation) (W.1),

- Limited climatic influence (L.), - Loading through short-time influence of water on the component surface

(W.1.), - Ambient temperature in indoor and outdoor storage up to +40 °C (+40).

T.I.W.2 - L.W.2.+40

960 2400


- No climatic influences (I), - Loading through permanent or frequent influence of water on the

component surface (e.g. splashes, fumes, condensation) (W.2.),

- Limited climatic influence (L.), - Loading through permanent or frequent influence of water on the

component surface (W.2.), - Ambient temperature in indoor and outdoor storage up to +40 °C (+40).

T.I.W.2 - L.W.2.+90 Up to +90


- No climatic influences (I), - Loading through permanent or frequent influence of water on the

component surface (e.g. splashes, fumes, condensation) (W.2.),

- Limited climatic influence (L.), - Loading through permanent or frequent influence of water on the

component surface (W.2.), - Ambient temperature in indoor and outdoor storage up to +90 °C (+90).

a) According to DIN EN ISO 9227

b) According to DIN EN ISO 6270-2, CH = constant condensation-water atmosphere

SN 274-2:2017-10

5.2 Coater

Coating shall be made in compliance with the basic requirements specified in section 4 of SN 200-7:2016-05. The tables 10 to 15 state the surface preparation and the types of binders of the coating systems of the tables 3 to 8. Unless otherwise stated in the ordering documents, the colors of the individual coating systems shall follow the specifications made in Annex A (normative). All colors shall be the glossy type as defined in DIN EN ISO 2813. Upon request by SMS group, the coater shall carry out supervision of coating during production according to 6.2 and shall document such supervision in an examination record shown in Annex C (normative).

Coating materials for the coating systems as in tables 10 to 15 are shown in SN 274-2, Supplementary Sheet 1. The use of technically equivalent coating materials is allowed provided that the conformity with the requirements made on the coating systems according to 5.1 can be proven by the coating producer according to 5.3.

Table 10 – CS for permanent corrosion protection (resistance to water)

Coating system (CS)

Surface condition of

uncoated component

Prime coat Cover coat

Examples of application Type of binder

Type Type of binder

Type

P.I.W.1.+120 Sa 2 ½ -

var. EP

var. External coating of machine and structural steel components, pipe lines and vessels in steel in general (for general application in hot and cold rolling mills, strip processing lines, continuous casters and steelmaking plants)

EP AK

P.A.W.1.+120 Sa 2 ½, Be EP

var.

PUR

var. Sa 2 ½, Be, St3

AK AK

P.I.W.3.+40 Sa 2 ½, St3 EP var. EP var. Internal coating of vessels/tanks (water and compressed-air systems)

Table 11 – CS for permanent corrosion protection (resistance to chemicals in general)

Coating system (CS)


uncoated component



Type Type of binder

Type

P.I.O.2.+120 Sa 2 ½, St3, Be

EP var. EP var.

External coats of machines or machine parts exposed to permanent or frequent influence of organic chemical fumes and/or chemical splashes (for cold, aluminum and special-steel rolling mills)

P.I.A.2.+150 Sa 2 ½, Be EP var. EP var.

External coating of machines or machine parts exposed to permanent or frequent influence of inorganic chemical fumes and/or splashes of chemicals (for pickling lines)

Table 12 – Coating systems for permanent corrosion protection (resistance to mineral oil)

Coating system (CS)


uncoated component



Type Type of binder

Type

P.I.O.3.+80 Sa 2 ½, St3 EP

var. - - Internal coats of tanks (hydraulic systems) PUR

P.I.O.3.+100 Sa 2 ½, St3 PF var. - - Internal coats of tanks (centralized oil and oil-film systems)

P.I.O.3.+150

Sa 2 ½, St3, Sa3, Be EP var.

EP var.

Internal coating of e.g. gear housings and gear internals such as welded gearwheels and oil splash rings Be PUR

SN 274-2:2017-10

Table 13 – Coating systems for permanent corrosion protection (resistance to heat)

Coating system (CS)


uncoated component

Prime coat Intermediate

coat Cover coat


Type Type of binder

Type Type of binder

Type

P.I.K.0.+400 Sa 2 ½, Be EPE Zn (R) - - SIL var.

External coats of machines or machine parts exposed to high temperatures (high-temperature areas in hot rolling mills, continuous casters etc.)

Sa 2 ½, ESI Zn (R) - - SIL var.

P.A.K.0.+400 Sa 2 ½, Be EPE Zn (R) - - SIL var.

Sa 2 ½, ESI Zn (R) - - SIL var.

P.I.K.0.+600 Sa 2 ½, - - - - SIL var. External coats of machines or machine parts exposed to high temperatures (areas of very high temperatures in continuous casters, steelmaking plants etc.)

P.A.K.0.+600 Sa 2 ½, - - - - SIL var.

Table 14 – Coating systems for permanent anti-slip corrosion protection

Coating system (CS)


uncoated component



Type Type of binder

Type

PR.I.O.2.+100 Sa 2 ½ - - NBR var. Anti-slip coat for smooth plates (plate flooring)

Table 15 – Coating systems for temporary corrosion protection

Coating system (CS)

a)


uncoated component

Classification acc. to ISO 6743-8

Temporary corrosion protection

Examples of application

T.I.W.1- L.K.0.+40

Sa3 b)

ISO-L RE

Preservation of internal and external component surfaces for intermediate storage

Application on all metallically bright surfaces for short-time shipment or storage

T.I.W.1 - L.W.1.+40 ISO-L RF

Preservation of internal component surfaces

Use for all metallically bright surfaces like gear internals, contact faces etc.

T.I.W.2 - L.W.2.+40 ISO-L RF Preservation of external component surfaces

Application on all metallically bright surfaces

T.I.W.2 - L.W.2.+90 ISO-L RM Preservation of internal component surfaces

Use for all metallically bright surfaces like gear internals etc. a)

For the explanation of the coating system and the juxtaposition with the previous designations of SN 200-7:2010-09, see Annex F (informative)

b) The indication of Sa3 in temporary corrosion protection refers to the features of the preparation grades according to DIN EN ISO 12944-4:1998-07 and not to the associated rust removal method Sa (blast cleaning).

5.3 Coating material producer

The coating materials to be used for the coating systems in this present company standard shall fulfill the requirements specified in tables 1 to 9 and fulfillment shall be proven either by experience data of the owner or the coating material producer, and/or by the results of laboratory tests according to 6.1. The following is considered to be experience data: - Laboratory tests with recorded and reproducible results corresponding to the specifications in 6.1; - Reference objects demonstrably provided with the coating system according to the present standard and whose suitability

is to be verified. The coating materials used for coating systems according to tables 4 to 6 and table 8 shall always be designed for a protective life M, those for coating systems according to table 7, for a protective life L according to DIN EN ISO 12944-5:2008-01. In addition, the coating material should be provided with a sufficient description based on the data listed in Annex B (informative). Unless otherwise stated in the ordering documents, the colors of the individual coating systems shall follow the specifications made in Annex A (normative). All colors shall be the glossy type as defined in DIN EN ISO 2813.

SN 274-2:2017-10

6 Examination specifications

6.1 Laboratory tests by the coating material producer


For the suitability tests of the coating materials, sample plates with the respective material shall be prepared for the laboratory tests upon agreement with the test laboratory. The dimensions of the sample plates are indicated in DIN EN 14879-2:2007-02, section 8.2.1. The identity of the materials shall be proven to the test laboratory by indication of the physicochemical characteristics. It is also possible to furnish individual proof to the laboratory by means of certified reference objects.

6.1.2 Permanent and permanent anti-slip corrosion protection

For verification of the suitability of coating materials for the coating systems according to 5.1.2 and 5.1.3, the following examinations shall always be carried out and proven: - Structure of the coating system (The color shall be visually examined by comparison with a color control chart (RAL, NCS etc.), the degree of gloss

shall be examined according to DIN EN ISO 2813. Position, thickness and homogeneity of the individual layers and the surface condition shall be determined. They

shall comply with the specified data of the coating material producer.) - Temperature resistance (permanent) - Hardness of coat over 1 mm according to DIN EN 59 (suitable hardness testing methods shall be agreed for coats of less than 1mm) - Adhesiveness on the basis of DIN EN ISO 4624, adhesives shall be selected as suitable for the coating material. For

coats ≤ 250 µm the cross-cut test according to DIN EN ISO 2409 can be agreed. The position of the parting plane shall be assessed according to DIN EN ISO 4625-1. The values specified in the tables 1 to 3 in section 5.1.1 shall be observed.

- Salt spray test according to DIN EN ISO 9227. The values specified in the tables 1 to 3 in section 5.1.1 shall be observed. The following extended suitability tests shall be made in addition depending on the requirement on the coating system of tables 3 to 7 and proof of the tests shall be furnished:

- Resistance to condensation water according to DIN EN ISO 6272-2. The values specified in the tables 1 to 3 in section 5.1.1 shall be observed.

- Resistance to chemicals according to DIN EN ISO 2812-1. The values specified in the tables 1 to 3 in section 5.1.1 shall be observed.


For verification of the suitability of coating materials to be used for the coating systems according to 5.1.4, the following examinations shall always be carried out and proven: - Temperature resistance (permanently) - Salt spray test according to DIN EN ISO 9227 - Resistance to condensation water according to DIN EN ISO 6272-2.

6.2 Examinations to be made by the coater

6.2.1 Permanent and permanent anti-slip corrosion protection

6.2.1.1 Incoming inspection of the coating material

The coater shall carry out the incoming inspection of the coating materials as follows: - Examination of the package marking for conformity with the data in the manufacturing documents. - Visual examination of the color of the coating material.

6.2.1.2 Coating suitability of the component

Prior to coating, the coater shall examine the surface condition, surface cleanliness and roughness according to DIN EN ISO 12944-4 and/or DIN EN ISO 8503-2 for conformity with the specifications in the tables 10 to 14.

6.2.1.3 Ambient conditions

The coater shall examine the conformity with the necessary ambient conditions such as ambient temperature, material temperature, dew point, relative humidity etc. (as indicated by the coating material producer) throughout the entire duration of coating (i.e. from the beginning of the surface preparation to the end of the reaction time).

6.2.1.4 Coating method

The coater shall check, on the basis of the coating material producer’s specification, the conformity with the prescribed coating method including mixture ratios, processing time, pot life, post-treatment and the specified structure of the coat. 6.2.1.5 Individual layer thickness

Conformity with the individual layer thickness of a coat according to the specifications of the coating material producer shall be examined by means of wet film thickness measurement according to DIN EN ISO 3882 or dry film thickness in the case of ferro-magnetic substrates according to DIN EN ISO 2178, and in case of non-magnetic substrates by means of the eddy current method according to DIN EN ISO 2360.

SN 274-2:2017-10


6.2.2.1 Incoming inspection of the coating material

The coater shall carry out the incoming inspection of the coating materials as follows: - Examination of the package marking for conformity with the data in the manufacturing documents.

6.2.2.2 Coating suitability of the component

Prior to coating, the coater shall examine the surface condition, surface cleanliness and roughness according to DIN EN ISO 12944-4 and/or DIN EN ISO 8503-2 for conformity with the specifications in the table 15.

6.3 Acceptance inspection of the finished coat


In individual cases, SMS group reserves the right of acceptance inspection of the coat, which includes the individual examinations specified in 6.3.2.1 and 6.3.3.1. The acceptance of the coat shall be documented in a coat acceptance inspection record as in Annex D (normative), section D.1. If destructive testing of the coat is agreed, such testing shall be carried out on sample plates prepared during manufacture according to sections 6.3.2.2 and 6.3.3.2. The acceptance of the coat shall be documented in a coat acceptance inspection record as in Annex D (normative), section D.2. 6.3.2 Permanent and anti-slip permanent corrosion protection

6.3.2.1 Acceptance inspection of the finished component

The following examinations shall be carried out on the finish-coated component: - Visual check of the surface condition of the coat (cracks, homogeneity, degree of gloss etc.). - Examination of the layer thickness of the coating system according to the specifications of the coating material producer by means of equipment for non-destructive testing as in DIN EN ISO 2808. - The coloring coats (prime, intermediate, cover coats) shall be determined by means of the scratching test. - The color shall be visually examined on the basis of the specifications in the manufacturing documents.

6.3.2.2 Acceptance inspection of sample plates

On sample plates, according to DIN EN 14879-2:2007-02, section 8.2.1, the examinations specified in 6.3.2.1 shall be carried out. In addition, the adhesive strength of the coat shall be examined preferably in the form of a pull-off test on the basis of DIN EN ISO 4624. For thin coats ≤ 250 µm, the cross-cut test according to DIN EN ISO 2409 can be agreed. The position of the parting plane shall be assessed according to DIN EN ISO 4625-1. The cross-cut characteristic of 0-1 according to DIN EN ISO 2409 after 0 load hours specified in section 5.1.1 shall be complied with. 6.3.3 Temporary corrosion protection

6.3.3.1 Acceptance inspection of the finished component

The following examinations shall be carried out on the finish-coated component: - Visual examination of the surface condition of the coat. - Examination of the layer thickness of the coating system according to the specifications of the coating material producer

by means of equipment for non-destructive testing as in DIN EN ISO 2808. 6.3.3.2 Acceptance inspection of sample plates

On sample plates the examinations specified in section 6.3.3.1 shall be carried out.

SN 274-2:2017-10

Annex A (normative)

Colors of the coating systems (CS)

Table A.1 – Colors of the CS for permanent corrosion protection (resistance to water)

Coating system Color

P.A.W.1.+120 Prime coat Concrete grey RAL 7023

Cover coat Reseda green RAL 6011

P.I.W.3.+40

Prime coat Mouse grey RAL 7005 or red brown RAL 8012

Intermediate coat

Cover coat

Table A.2 – Colors of the CS for permanent corrosion protection (resistance to chemicals in general)


PR.I.O.2.+100 Cover coat Jet black RAL 9005

P.I.O.2.+120 Prime coat Pebble grey RAL 7032


P.I.A.2.+150

Prime coat Red brown RAL 8012

Intermediate coat


Table A.3 – Colors of the CS for permanent corrosion protection (resistance to mineral oil)



Cover coat -

P.I.O.3.+100 Prime coat Silver grey RAL 7001

Cover coat -


Cover coat Ivory RAL 1014

Table A.4 – Colors of the CS for permanent corrosion protection (resistance to heat)


P.I.K.0.+400 Prime coat Dusty grey RAL 7037

Cover coat White aluminium RAL 9006

P.A.K.0.+400

Prime coat Dusty grey RAL 7037

Intermediate coat Oxide red RAL 3009

Cover coat White aluminium RAL 9006

P.I.K.0.+600 Cover coat White aluminium RAL 9006 or iron mica

P.A.K.0.+600 Cover coat White aluminium RAL 9006 or iron mica

SN 274-2:2017-10

Annex B

(informative) Data of the coating material producer

Table B.1 – Data of the coating material producer

Coating material data

Binder

Solids content

Nonvolatile matter content

Viscosity, flow time

Density

Color

Mixture ratio

Gel time

Minimum durability and storage conditions

Hazard warnings (marking according to national regulations)

Processing data

Ambient conditions (e.g. ambient temperature, material temperature, dew point, relative humidity etc.)

Safety precautions for storage, processing and disposal

Surface preparation for the material to be coated (e.g. ferritic steel)

Mixing ratio and mixing method

Coating method (spraying, brushing etc.)

Pot life and pertaining temperature

Thermal post-treatment

Hardening time and pertaining temperature

Processing time (for coating in two or more phases)

Repairs

Package data

Coating material producer or supplier

Product designation, commercial name

Classification

Batch number

Production date

Minimum durability

Color

Storage conditions

Mass/volume

SN 274-2:2017-10

Annex C (normative)

Record of in-process supervision by the coater

Test record

In-process supervision by the coater

Ordered by: Name of coater: Coating material:

Project definition: a) WBS element:

b)

Material No.: c) Coating system:

a) Previous designation: Codeword

b) Previous designation: Project No.

c) Previous designation: Drawing No.

1. Check before coating

1.1 Rust grade (DIN EN ISO 8501)

Initial condition of the surface A □ B □ C □ D □

1.2 Preparation grade

(DIN EN ISO 12944-4) Sa2 ½ □ Sa3 □ St2 □ St3 □ Be □

1.3 Degree of surface preparation P2

(DIN EN ISO 8501-3) Yes □ No □

1.4 Component surface Steel □ Cast steel □ Cast iron □

1.5 Roughness

(surface profile comparators DIN EN ISO 8503)

Grit □ Shot □ Fine □ Medium □ Coarse □

1.6 Check for contamination

(DIN EN ISO 8502)

Oil/grease □ Dust □

Chloride testing □ (only upon request by SMS group)

1.7 Examination of the coating material

Color □ Stirred, no skin formation □ Package durability □ Package marking □

1.8 Examination of ambient conditions

Dew point check □ Air temperature >3 °C, 3 °C above dew point <80% rel. humidity □ Component temperature min. +3 °C □ Surface accessibility □

2. Check during coating/between coating steps

2.1 Place of application Manuf. works □ Workshop □ Constr. site □ ______________□

2.2 Method of application Brush/roller □ Airless spraying □ Compr. air spraying □

2.3 Additional work Edge protection provided □ _____________□

2.4 Check of wet film thickness

(NSD) (DIN 2808)

Prime coat ____µm □ Intermediate coat ____µm □ Cover coat ____µm □

2.5 Examination of ambient conditions

Dew point check □ Air temperature >3 °C, 3 °C above dew point <80% rel. humidity □ Component temperature min. +3 °C □ Application conditions □

2.6 Further processing check

Drying time observed □ Retouching time observed □ Air humidity observed >50 % □ (hygroscopically hardening coat e.g. zinc-rich ethyl silicate prime coat)

Remarks on the examinations:

Objections Yes □ Refer to remarks

Repetition Yes □

Release Yes □

No □ No □ No □

Place of examination: Tester: Date: Supplier Date:

SN 274-2:2017-10

Annex D (normative)

Coat acceptance examination records

D.1 Record of acceptance examination of the finished coat on the component

Test record

Acceptance examination of the finished coat on the component

Ordered by: Name of coater:


b)





Acceptance examinations on the finished component

Check:

1. Visual check

Damage to coat

Results:

1. Visual check

No □ Yes □

Remarks:

2. Film thickness

2.1 Check of dry film thickness

Overall film thickness Reference value:______________µm

2. Film thickness


Overall film thickness Actual value:______________µm

Prime coat Reference value:______________µm

Intermediate coat Reference value:______________µm

Cover coat Reference value:______________µm

Prime coat d)

Actual value:______________µm

Intermediate coat d)


Cover coat d)


d) Values from in-process supervision

2.2 Correction value for dry film thickness (ISO 19840)

Fine (10 μm) □

Medium (25 μm) □

Coarse (40 μm) □

--

3. Examination for defects Test instrument: Test voltage: ______________ kV

--

Inspection results



Repetition Yes

□ Release

Yes □ No □ No □ No □

Place of examination:

Tester: Date: Supplier Date:

SN 274-2:2017-10

D.2 Record of acceptance examination of the finished coat on sample plates

Test report Acceptance examination of the finished coat on the sample plates

Ordered by: Name of coater:


b)





Acceptance examinations on sample plates

Check:

1. Visual check

Damage to coat

Results:

1. Visual check

No □ Yes □

Remarks:

2. Film thickness


Overall film thickness Reference value:______________µm

2. Film thickness


Overall film thickness Actual value:______________µm

Prime coat Reference value:______________µm

Intermediate coat Reference value:______________µm

Cover coat Reference value:______________µm

Prime coat Actual value:______________µm

Intermediate coat Actual

value:______________µm

Cover coat Actual value:______________µm

2.2 Correction value for dry film thickness (ISO 19840)

Fine (10 μm) □

Medium (25 μm) □

Coarse (40 μm) □

--

3. Testing of Shore/Barcol hardness

Measuring instrument: __________________

Setpoint: _______________Shore A / Shore D / Barcol

3. Testing of Shore/Barcol hardness Actual value: ____________Shore A / Shore D / Barcol

4. Check of adhesiveness

Measuring instrument: __________________

Setpoint: __________________N/mm²

4. Check of adhesiveness Actual value: __________________N/mm²

5. Cross-cut test Cross-cut characteristic 0-1 according to DIN EN ISO 2409 after 0 load hours

5. Cross-cut test Actual value:______________

6. Examination for defects

Test instrument: Test voltage: ______________ kV

--

Inspection results



Repetition Yes □

Release Yes □

No □ No □ No □

Place of examination: Tester: Date: Supplier Date:

SN 274-2:2017-10

Annex E (informative)

Explanation of binder short designations

Table E.1 – Short designations according to DIN EN ISO 12944-5:2008-01

Short designation Meaning

1K One component

2K Two components

EP Epoxy resin

ESI Ethyl silicate

AK Alkyd resin

AY Acrylic resin

CR Chlorinated rubber

PF Phenolformaldehyde

PVC Polyvinyl chloride

PUR Polyurethane

SN 274-2:2017-10

Annex F

(informative) Juxtaposition of coating system designations

The tables F.1 and F.2 show the juxtaposition of the previous designations according to SN 200-7:2010-09 and the new designations according to SN 274-1:2016-05.

Table F.1 – Permanent corrosion protection

Coating system SN 274-1:2016-05

Previous designation SN 200-7:2010-09

P.I.W.1.+120 SMS group standard

Oil-resistant, external component coat

P.A.W.1+120 SMS group standard

Oil-resistant, external component coat

P.I.K.0.+400 Heat-resistant

P.A.K.0.+400

P.I.A.2.+150 Resistant to chemicals

PR.I.O.2.+100 Plate flooring (anti-slip coated)

P.I.O.3.+150 Oil-resistant, internal component coat

P.I.O.3.+80 Tarponal (zinc dust paint)

P.I.O.3.+100 Copaphen Aluminium

P.I.W.3.+40 Inertol-Poxitar

Table F.2 – Temporary corrosion protection

Coating system SN 274-1:2016-05

Previous designation SN 200-7:2010-09

T.I.W.1- L.K.0.+40 External and internal preservation for intermediate storage, Tectyl 511-M

T.I.W.1 - L.W.1.+40 Internal preservation, Tectyl 502-C

Preservation of oil film bearings

T.I.W.2 - L.W.2.+40 External preservation, Tectyl 846

T.I.W.2 - L.W.2.+90 Internal preservation Tectyl 506-EH

SN 274-2:2017-10

Amendments

Amendments made in comparison with SN 274-2:2016-05:

a) Editorial revision according to SN 104-4; b) Table 5: Chemical-resistance test duration of 168 hours added for coating system P.I.O.2.+120; c) Short designations of the coating systems added to the explanations of the coating system in the tables 4 to 9; d) Adding of reference to the assignment of the colors in Annex A (normative); e) Table 13: Adding of the binder types ESI and SIL for the coating systems P.I.K.0.+400 and P.A.K.0.+400;

f) Table A.2: Coating system P.I.O.3.+120 changed to P.I.O.2.+120, and system P.I.A.3.+150 changed to

P.I.A.2.+150; g) Table A.4: Iron mica added as color for the coating systems P.I.K.0 + 600 and P.A.K.0.+600.

Previous editions SN 274-2:2016-05 Translation

This English translation of SN 274-2:2017-10 appeared on 16.11.2017. No guarantee can be given in respect of this translation. In all cases the latest German version of this standard shall be taken as authoritative.

coating systems sn 274-2 requirements

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