Download - BD0425A-57A1_Bolt Up Procedure for Critical Flanges

JOB SPEC. BD0425A-57A1 BOLT-UP POCEDURE FOR Page: 1 of 22 CRITICAL FLANGES Rev.: I01 Date: Dec. 11, 2008

Hellenic Petroleum S.A.

Thessaloniki Refinery Upgrading Project Thessaloniki – Greece

1-BD-0425A

REVISION INDEX PAGE REV DATE 1 I01 11/12/08 2* I01 11/12/08 3 I01 11/12/08 4* I01 11/12/08 5* I01 11/12/08 6 I01 11/12/08 7 I01 11/12/08 8 I01 11/12/08 9 I01 11/12/08 10 I01 11/12/08 11 I01 11/12/08 12 I01 11/12/08 13 I01 11/12/08 14 I01 11/12/08 15 I01 11/12/08 16 I01 11/12/08 17 I01 11/12/08 18 I01 11/12/08 19 I01 11/12/08 20 I01 11/12/08 21 I01 11/12/08 22* I01 11/12/08 * Asterisk represents pages revised for this issue.

Initial issue X Entire specification reissued Revised pages only attached

Please replace revised pages with those now in your possession. Prepared by: E. De Rogatis Approved by: F. Chisoli Signature:


CONTENTS PARA. SUBJECT I. INTRODUCTION II. FACTORS AFFECTING BOLT-UP RELIABILITY III. PREPARATION PROCEDURE IV. BOLT-UP PROCEDURE

A. TORQUE WRENCH METHOD B. BOLT TENSIONING METHOD

V. ASSEMBLY PROCEDURE QUALIFICATION VI. MAXIMUM BOLT STRESS VII. STAMPING/TAGGING OF FLANGED JOINTS VIII. INFORMATION FOR MATERIAL REQUISITION PREPARATION

FIGURE "1" ALIGNMENT ALLOWANCES FOR PIPING FLANGES FIGURE "2" FLANGE MAKE-UP CHECK-LIST FIGURE "3" BOLT ELONGATION RECORD FOR CRITICAL FLANGES FIGURE “4" BOLT UP REPORT FOR FLANGED JOINTS


I. INTRODUCTION

A. This Job Specification is applicable for bolt-up of critical flanges of equipment and piping, as defined at below paragraph I.C, by means of adequate tools procedure.

B. The information contained here is aimed to provide a controlled bolt-up

procedure for critical flanges to achieve the plant delivery to the Owner with leakage free joints at any condition.

This Job Specification does not cover "Post Start-up" operations. C. A recommended criteria for selecting critical joints requiring special treatment,

including controlled bolt-up, is as follows:

1. Equipment

a. Flanged joints with bolt size 1-½" and greater. b. Flanged joints with A-193 Grade B7M (when required by

ExxonMobil GP 06-01-01, paragraph 8.1.1.1) and A-320 Grade L7M bolts, regardless the size.

2. Piping system

a. Flanged joints with nominal size 6" NPS and above and rating

900# and above.

b. Flanged joints with bolt size 1-½” and greater.

D. This Job Specification has to be considered a guideline for Vendors/Contractors rater than a series of mandatory requirements. Vendors/Contractors shall develop their own bolt-up procedure (to be issued for FW/HELPE review) based on the indication shown on their document. This Job Specification does not cover flange joint design that shall be in accordance with the applicable specifications, ASME code and standards.

E. As "Vendor" it is intended the equipment (Vessel, exchanger etc.)

manufacturer; as "Contractor" it is intended the organization in field that will supply the bolt-up services.

F. Vendor is responsible for correct bolt up procedure of all critical flanges proper

of his supply, whether performed by him in his shop or repeated by other in field.

Vendor has to perform the bolt-up activity in his shop according to a.m. procedure, considering that a waive may be asked for critical joints to be reopened in field (such as Vessel manways).


G. Contractor is responsible for correct bolt up procedure of all critical piping joints.

He shall perform the bolt-up activity of:

- Piping joint as per his own procedure - Equipment joint as per Vendor procedure (see F above)

H. In particular, Vendor/Contractor shall define in his procedure the maximum

bolt stress to be reached without damaging the gasket flange assembly, recognizing that the values given in TABLE 2 and para VI are indicative and referred to piping standardized flanges only. Appropriate calculation shall be submitted for FW/HELPE review in order to demonstrate the suitability of the gasket flanged assembly for the selected maximum bolt stress.

I. Vendor/Contractor shall provide a “Final Bolt up Report” for any flanged joint

using the form given in FIGURE N° 4 of this Job Spe cification. II. FACTORS AFFECTING BOLT-UP RELIABILITY

A. The major factors for successfully making up a bolted joint and eliminating leakage are:

1. proper selection and design of the component, i.e. flanges, gaskets

and bolts;

2. proper preparation, inspection and installation;

3. correct bolt-up procedure. III. PREPARATION PROCEDURE

A. Prior to gasket insertion

1. Clean gasket seating facing using wire brush (use stainless steel bristles on alloy components).

2. Check conditions of flange faces for scratches, dirt, scale, remnant

gasket and protrusions. Flange faces with coarse tool marks or scratches that form leakage paths should be refaced.

3. Check that flange facing, gasket material, dimensions and type of

bolting are in accordance with the general specifications.


4. All gaskets should be replaced with new ones whenever an opened joint is to be closed again. This recommendation is mandatory for soft material gaskets and metalloplastic gasket (such as spirally wound or double jacketed gaskets).

5. Visually examine gaskets prior to installation to assure they are free from defects. All damaged gaskets (including loose spiral windings) should be rejected.

6. Use straight steel rule edge to check facing flatness. Flange shall have

bearing surfaces for bolting that are parallel to the flange face within 1 (one) degree. Wrapped or badly corroded flanges should be replaced/repaired.

7. Flanges at rest should be parallel. Alignment should be achieved by

cutting and re-welding the pipe where possible. When trueing flanges, make sure that there are no residual stresses in the joint, particularly in machinery piping. Guidelines of alignment allowance are given in FIGURE N° 1 of this Job Specification for pipe flan ges and 0,8 mm maximum out of parallel tolerance for exchanger girth flanges. Final alignment shall be filed and recorded for future reference using the form given in FIGURE N° 2 of this Job Specification . The use of flame for the alignment of flanges is not permitted.

NOTE: Alignment can be checked using a straight steel rule. 8. Studs and nuts shall be cleaned using wire brush to remove any dirt

on the threads. Visually examine studs and nuts after cleaning to ensure free from burrs. Nuts should turn freely on the studs for a distance equal to their in-service make-up. Lubricate the threads and nuts to flange contact surfaces with one of the anti-seeze products indicated in TABLE 1 of this Job Specification; lubrication aids in achieving required bolt tension uniformly for the flange.

9. Align flange faces exactly, leaving just sufficient gap to insert the

gasket. Once flanges have been aligned up, visually examine them to assure that an acceptable fit has been obtained. Use flange spreader instead of wedges for wedging.

10. Prior to inserting slip-blind, it should be checked for protrusion or burrs

at blind expecially at edges.

B. Gaskets and bolts insertion

1. Visually examine gaskets, prior to installation, to assure they are free from defects. Do not use sealing compound, grease or other paste or adhesive on gasket or flange faces. Holding gasket in place may


present a problem, but use of greases, pastes or other substances to stick them in place should be avoided. If absolutely necessary to use something to hold gasket in place, the thin adhesive tapes such as surgical tapes or relatively stiff glazing type putty may be used in place along the outside edges of gasket.

Tape/putty need to be located with care to avoid infringing on the flange face/gasket seating surfaces.

2. Visually examine the flange alignment to ensure that an acceptable fit

has been obtained. Studs inserted through the bolt holes of the flanges should guarantee the sustained alignment of the flanges without blocking insertion of the gasket.

3. Insert the gasket between the flanges carefully to assure proper

placement. Make certain that gasket is properly true in joint.

4. Insert all remaining studs and nuts on hand-thight. Do not pull up studs in a manner that reaches uneven compression of the gasket.

5. Ensure all bolts are installed with at least two threads protrusion

through the nuts at both sides. Where bolt tensioner is to be used, protrusion shall be at least one bolt diameter on one of two sides.

NOTE: Vendor/Contractor shall carefully complete the table given in FIGURE

2 of this Job Specification (“Flange make-up check list”).


ANTI-SEEZE - PRODUCTS

NAME COMPOSITION TEMPERATURE MANUFACTURER NOTES

KEY Graphite and Oil Paste Maximum 343 °C (650 °F)

W.K.M. P.O. box 2117 - Houston,

TX 77001

FEL PRO C - 100

Molybdenum Disulfide Maximum 400 °C (750 °F)

FEL PRO INC. P.O. box 7450 - North McCormick Boulevard

Skokie, IL 60076

MOLYLUBE ANTI

SEEZE

Molybdenum Disulfide Maximum 400 °C (750 °F)

BEL-RAY CO. INC. P.O. box 526 - Farmingdale,

NJ 07727

FEL PRO C5 - A

Colloidal Copper Maximum 540 °C (1000 °F)

FEL PRO INC. P.O. box 7450 - North McCormick Boulevard

Skokie, IL 60076

(1)

JET-LUBE Colloidal Copper Maximum 540 °C (1000 °F)

JET-LUBE P.O. box 212558,4849

Homestead Road - Houston, TX 77026

(2)

NEVER SEEZE NICKEL

SPECIAL

Colloidal Nickel All Temperatures NEVER SEEZE CORP. P.O. box 2910 - South

18th Avenue - Broadview, IL 60153

(3)

SILVER GOOP

Colloidal Silver All Temperatures CRAWFORD FITTING CO. P.O. box 29500 - Solon Road

Solon, OH 44139

(3)

THREAD EZE

Aluminium Powder Talk and Oil

Maximum 1200 °C (2200° F)

CHEMSEARCH SINGAPORE P.O. box 1544 - Parkway

Builders' Centre, 02 Singapore

NOTES: (1) Not suitable for use on austenitic stainless steel materials. (2) Suitable for use on stainless steel materials. (3) Suitable for use on austenitic stainless steel materials.

TABLE 1


IV. BOLT-UP PROCEDURE

A. TORQUE WRENCH METHOD This method shall be applied to piping flanges of case 2.a of the paragraph I.C

of this Job Specification (i.e. only for piping system when the flanged joints have nominal size equal to or greater than 6 inches NPS and rating equal to or greater than 900# but with bolts having a size less than 1 ½ inch). Hydraulic, pneumatic or beam type torque wrenches are commonly used in bolt tightening. The hydraulic wrenches are normally preferred. Calibrated torque wrenches have been used successfully for flange bolt-up. However, their successful use in achieving a target bolt stress live depends on qualification of the flange make-up operations and consistency in applying the procedure developed. This involves consistency in:

1. Determining by test the torque values necessary to achieve the

desired bolt stress.

2. Ensure that the load bearing surfaces are in good conditions; check the thread flanks, bearing surfaces of bolt head, nuts and the flange surface.

3. Clean and lubricate threads, nuts and/or bolt head bearing surfaces.

For thread lubricants and anti-seeze compound see TABLE 1 of this Job Specification.

4. Always run the nuts down by hand; if they don't run by hand, there is a

probably defect in the thread. 5. "Hand" tighten bolts with a short wrench using the "CRISS-CROSS"

pattern shown in SKETCH 1. Do not tighten the bolts using impact force.

6. All torque wrenches shall be of adequate capacity and recently

calibrated. The system shall be tested on the "MOCK-UP" rings to familiarize operators with its use and also to calibrate the equipment before use. Certification of torque wrenches calibration shall be available

7. In the event that set-up or seizure of the nut being torqued is

encountered, back the nut off until seizure is eliminated and torque again. Apply lubricant if necessary and replace the nut and/or bolt if seizure occurs.

8. Hold torque wrenches perpendicular to the axis of the bolt while torque

is being applied. If hydraulic torque wrench is used, ensure that the


torque wrench reacts against a rigid support which is oriented parallel to the axis of the bolts.

9. The check of effective final bolt stress shall be performed as described

at paragraph VI.B of this Job Specification, therefore the two ends of each bolt shall be machined smooth finish, perpendicular to the bolt axis to allow the use of ultrasonic devices for bolt measurement.

10. Bolts tighten by a Torque Wrench Method shall be submitted to a

qualification procedure as indicated in paragraph V of this Job Specification.

TORQUING SEQUENCE

a. Torque bolts and nuts in a "CRISS-CROSS" pattern as shown in SKETCH 1 using a minimum of four torquing passes and the maximum bolt stress as defined at prevoius para I.H. Effective flanges bolting final torque value shall be based on the calculated maximum bolt stress (the values indicated in the TABLE 2 are for reference only)

PASS 1 Bring all nuts up snug-tight with a short wrench. PASS 2 Torque to a maximum of 40% of the final torque value in

accordance with the sequence of SKETCH 1. Check the flange is bearing uniformly on the gasket.

PASS 3 Torque to a maximum of 70% of the final torque value. PASS 4 Torque to the final torque value.

b. After the four basic torque passes are completed, repeat torquing the nuts at

least once using the final torque in a "CRISS-CROSS" manner until no further rotation of the nut is observed.

c. Continue torquing with the final torque in a clockwise or anti-clockwise

manner to ensure no further rotation.

d. All torque readings and sequences of tightening shall be filed and recorded for future reference using the form given in FIGURE N° 2.

NOTE: Consideration should also be given to using "BOLT ELONGATION"

technique to confirm proper and uniform preload achieved on selected critical flanges, i.e. Powerformer Effluent Exchangers girth flanges and pipe flanges say exceeding 10" diameter and 900°F in add ition to qualification of equipment/operators as covered later.


TYPICAL "CRISS-CROSS" BOLT TIGHTENING SEQUENCE

SKETCH 1


FLANGE BOLTING TORQUE TO DEVELOP 345 N/mm 2 BOLT STRESS

NOMINAL BOLT DIAMETER (in.)

INITIAL ( N.m )

INTERMEDIATE ( N.m )

FINAL ( N.m )

MAXIMUM ( N.m )

1/2 27 40 55 70

5/8 40 80 110 135

3/4 95 135 200 240

7/8 135 230 340 410

1 200 340 470 570

1-1/8 270 470 680 810

1-1/4 340 680 950 1220

1-3/8 540 950 1350 1620

1-1/2 675 1080 1755 2095

1-5/8 1080 1890 2835 3375

1-3/4 1220 2295 3510 4185

1-7/8 1350 2970 4455 5335

2 1350 3375 5400 6480

NOTES :

1) The shaded zone is indicated for reference only.

2) Maximum torque shall only be used if leakage is still occurred after tightening to the final torque.

3) All bolts are assumed to be well lubricated. The figures in this table are intended as a guide. Many unknown including the amount and type of lubrication will affect the torque to obtain 345 N/mm2 bolt stress. The only reliable way to determine bolt stress is to measure bolt elongation. If elongation measurement indicate that higher or lower torque loads are necessary to achieve 345 N/mm2, then the table shall be revised accordingly.

4) This table is developed for ASTM A-193 Gr. B7 bolt material and for Raised Face flange; in case of different material and/or facing refer to the maximum bolt stress listed in TABLE 3 and decrease the bolt torques proportionally.

TABLE 2


B. BOLT TENSIONING METHOD

The use of a bolt tensioner is foreseen for cases 1.a, 1.b and 2.b of the paragraph I.C (i.e. equipment and piping system flanged joints having bolts with size equal or greater than 1 ½ inch or equipments having bolts made of A-193 Grade B7M / A-320 Grade L7M). This device saves labor and will facilitate attaining very even bolt loading. The tensioning of bolts should be performed by speciality company (Furmanite, UVIT or equivalent) using proprietary equipment (bridges, pullers, hydraulic pumps, connection pipes, manometers, etc.). Is important to notice that the herebelow procedure is a recommended guideline and not mandatory; Vendor/Contractor has to submit a proper bolt-up procedure for FW/HELPE review.

Ideally all bolts should be tensioned in one operation to ensure even loading

on the bolts and gaskets. It may not be practical to tension all bolts in one operation, but at least 50% of the bolts equally spaced should be tightened in one operation to ensure an acceptable degree of uniformity in loading. Bolt tensioning should not be carried out for equipments that are in service under pressure.

The following procedure is recommended (using an example of 20" - 900#

flange bolt-up) and 50% of the bolts will be tightened at the same time.

1. Group the 20 bolts into two groups (10 A's and 10 B's) as shown in SKETCH 2 and then mark them accordingly on the flange.

2. Mount the 10 hydraulic pullers on the first 10 bolts say A's group of

bolts. 3. Apply equivalent hydraulic pressure by operating the hydraulic pump

to give a bolt load equal to 100% of the maximum bolt stress (see paragraph 1.H and paragraph VI).

4. Check the hydraulic system if there is any pressure problem. 5. Verify that the specified hydraulic pressure is applied to the tensioner

before running the nut down on each stud. 6. Shift the pullers to the next group (group B) and repeat the steps 3 to

5, but applying a bolt load equal to 125% of the maximum bolt stress.


BOLT PARTITION FOR BOLT TENSIONING METHOD

SKETCH 2


7. Repeat steps 2 to 6 by increasing the hydraulic pressure to 125% of maximum hydraulic pressure, on the bolts of group "A".

8. Repeat the steps 2 to 5 on the bolts of group "B" to check the hydraulic

pressure is 125% of the maximum required to obtain the required bolt stress.

9. The hydraulic operating pressure varies according to the type and size

of tools used. Reference shall be made to the equipment's manufacturers specification.

10. The specialized technician selected to perform the controlled bolt

tensioning of critical flanges shall develop in the preliminary operation a diagram correlating the required pressure to be reached in the hydraulic circuit connected to the tensioners and the required stress in each bolt.

11. The two ends of each bolt shall be machined smooth finish,

perpendicular to the bolt axis to allow the use of ultrasonic devices (such as the BOLT SCOPE SMS produced by Pilgrim Moomside Ltd. or equivalent) for bolt elongation measurement (in order to perform the check of the effective final bolt stress as described at paragraph VI.B). In addition a bolt extra length shall be provided to permit the use of bolt tensioners (refer to paragraph III.B.5).

12. Bolts 11/2 inch and larger and bolts made of A-193 Grade B7M / A-320

Grade L7M shall be fitted with hardened washers conforming to ASTM F 436 under each nut. Washers fabricated from AISI 4140 material are acceptable. Surface finish shall be 125 microinch (3.2 micrometers) Ra or smoother on both sides.

13. The specialized technician selected to perform the bolt tensioning shall

fill the form given in FIGURE N° 3 stating the proc edures adopted during the operations and the parameters adopted (pressure in the hydraulic circuit, temperature of flanged joints, etc). The form shows also the original length of bolts (unstressed conditions) and the final length of bolts (stressed conditions).

14. The protruding end of the tensioned stud bolts for equipment and for

piping flanges having diameter greater than 1 ½ inches shall be protected against impact by means of aluminium protectors for nut and thread, type HTNTPCM by Hydratight Boltech or equivalent.


V. ASSEMBLY PROCEDURE QUALIFICATION Each size of bolts for flange of case 2.a of paragraph I.C of this Job Specification (i.e.

only for piping system when the flanged jonts have a nominal size equal or greater than 6 inches NPS and a rating equal or greater than 900# but with bolts having a size less than 1 ½ inch and therefore tighten with a Torque Wrench Method) shall be submitted to a qualification procedure. The qualification shall be carried out on mock-up flange and elongation of each bolt shall be measured to ensure uniform bolt tension. For the finished joint, bolt elongation should correspond to maximum bolt stress value tertermined as per para I.H. ± 10%. A. MOCK-UP QUALIFICATION PROCEDURE

1. Prepare the stud bolt end to improve the accuracy of the stretch measurement. The elongation measurement will be on the order of tenths of millimeters.

2. Measure and record (using the form of the FIGURE 3 of this Job

Specification) the initial length of bolts. Each reading should not differ by more than 2%.

3. Tight the bolts using the method described in paragraph IV.A of this

Job Specification. Read the final length of bolts and calculate the elongation (at least 2 or 3 reading in order to determine the average value; each single reading should not differ by more than 2% from the average).

4. Record the desired elongation and also the recommended tool setting

(torque value).

5. The crew is considered "qualified" after having make-up two sets of flanges bolted-up with the maximum bolt stress ± 10% (refer to paragraph V.B of this Job Specification).

B. CORRELATION BETWEEN ELONGATION AND STRESS

1. A suitable device for measuring bolt elongation is the use of an

ultrasonic probe.

2. The formula derived from the basic stress-strain relationship is:

StressStrain = E, Modulus of Elasticity


Strain = ElongationBolt Lenght =

B - AL =

StressE

Elongation = Stress

E x L

where L is the effective bolt length measured from center of nuts.

NOTE: for A-193 Grade B7 bolts: Stress

E = 0,001672.

VI. MAXIMUM BOLT STRESS

A. Correspondences

Vendor/Contractor shall define in his procedure the maximum bolt stress to be reached without damaging the gasket flange assembly.

TABLE 2 of this Job Specification gives an example of torque values for

Torque Wrench Method (for reference only) based on the bolt stress of A-193 Grade B7 or A-320 Grade L7 for standard flanges. TABLE 3 indicates the maximum bolt stress values recommended for some of the flanges present in a refinery. It is important to notice that there are some flanges where lower bolt stress values are appropriate depending on the flange rating, and/or type bolting and gaskets. In case of the Ring Joint Flanges, lower maximum bolt stress values are recommended for the higher flange ratings to avoid excessive bolt loads which can lead to undesiderable deformations to ring gasket and flange groove seating surfaces. Unlike raised face flanges, there is a little difference in gasket seating area with ring joint flanges as flange ratings increase so bolting loads are more concentrated in narrow zones of the ring groove. The remaining situations are all governed by the material strength of the specific bolt indicated (See also the previous point I.H.)

B. Check of final bolt stress in Production

The check of final bolt stress shall be performed for all critical flanges. The

verification shall be based on the measurement of the bolt elongation described at the previous para V.B.

The check will be spot, 10% of flanged joint (for piping) and at least 4 bolts of every joint for equipment tightened by each crew, and it shall be performed as follows:


1. measure with ultrasonic device (such as the BOLT SCOPE SMS produced by Pilgrim Moomside Ltd. or equivalent) the bolt elongation of four bolts diametrically opposite;

2. check the correspondence of the specified bolt stress in the range of ±

10% of the bolt elongation measured; 3. if the above correspondence will not be met in one bolt, then all the

bolting of the joint will be checked and, in case of no compliance, re-tensioned;

4. in case of no compliance of all 4 bolts for more than two joints in the

same sampling, all the flanged joint tensioned by the crew who performed the bolt-up during that working day, will be completely checked.

MAXIMUM BOLT STRESS

FLANGES TYPE/RATING BOLT MATERIAL MAX. BOLT STRESS (N/mm2)

Ring Joint Flanges ANSI CLASS 900

A-193 Grade B7 A-193 Grade B16

275



205



205

RAISED FACE A-193 Grade B8M 170 RAISED FACE A-193 Grade B8

(Strain Hardened) 275

RAISED FACE A-193 Grade B7 A-320 Grade L7

345

TABLE 3

VII. STAMPING/TAGGING OF FLANGED JOINTS Each bolted joint shall be identified with a tag or stamp with the initials of lead man of

crew that performed the bolt-up. VIII. INFORMATION FOR MATERIAL REQUISITION PREPARATION The following information shall be included in a Material Requisition covering the

specialist bolting Contractor/Vendor supply.


A. INFORMATION REQUIRED BY A SPECIALIST BOLTING CONTRACTOR/VENDOR (BEFORE BEGINNING)

The following information will be available to the Contractor based on

equipment drawings, Vendors procedures, piping sketches etc. 1. Number of flanged joints; 2. Size and rating of flanges; 3. Number of bolt, size and material. 4 Recommended bolt load

B. INFORMATION TO BE PROVIDED BY A SPECIALIST BOLTING

CONTRACTOR/VENDOR (BEFORE WORK BEGINNING)

Before work beginning, Contractor/Vendor will submit the following information:

1. Bolt-up procedure based on the recommendations of the present Job

Specification. 2. Type of tools (tensioners) and accessories with number of hydraulic

heads and number of crews foreseen. 3. Maximum pressure at which the tensioners are capable to operate. 4. Maximum bolt extension needed beyond nut to accept puller bar. 5. Hydraulic pump and accessories needed.

C. DOCUMENTATION TO BE PROVIDED BY A SPECIALIST BOLTING

CONTRACTOR/VENDOR (AFTER WORK COMPLETION)

After completion of the work, the following documentation shall be provided:

1. Final bolt-up procedure. 2. Flange make-up check list (FIGURE 2 of this Job Specification). 3. Bolt elongation record (FIGURE 3 of this Job Specification). 4. Flange alignment sheet.


FIGURE N° 1

A = 1 mm MAXIMUM OUT OF PARALLEL ALIGNMENT OF FLANGES MEASURED

ACROSS ANY DIAMETER B = 3 mm MAXIMUM TRANSLATION OF BRANCHES OR CONNECTIONS

ALIGNMENT RAISED FACE ALLOWANCES FOR PIPING FLANGES


FIGURE N° 2

FLANGE MAKE-UP CHECK LIST

LOCATION OF FLANGES

Reference No. As Per Attached Drawing

Is Raised Face In Good Condition ?

Is Gasket Surface Clean ?

Is Flange Alignement Within Tolerable Limits ?

Is The Gasket New ?

Type Of Gasket Used

Size & Rating Of Gasket

At Least 2 Threads protrusions

Are Threads Lubricated ?

Size Of Bolts Used

Type Of Material

Bolts Tightened In Correct Sequence ?

Is Controlled Torque Tightening Required ?

Initial Torque Value

Intermediate Torque Value

Final Torque Value

REMARKS

NOTES:

Contractor : _______________________ Name of Technician : ________________________

Supervisor : _______________________Signature : ________________________ Date : ___________

BO

LTIN

GG

AS

KE

T


FIGURE N° 3

BOLT ELONGATION RECORD FOR CRITICAL FLANGES

Flange Description/Location : ____________________________

Bolt Size : ____________________________

Hydraulic Pressure : ____________________________

Temperature of Flanged Joint : ____________________________

Maximum Bolt Stress : ____________________________

125 % of Maximum Bolt Stress : ____________________________

EFFECTIVE ORIGINAL FINAL CALCULATED

BOLT N°. BOLT LENGTH BOLT LENGTH BOLT LENGTH EL ONGATION BOLT ELONGATION REMARKS

( L ) ( A ) ( B ) ( B ) - ( A ) ( 0,001672 x L ) [1]

NOTES:[1] The elongation coefficient mentioned is based on ASTM A-193 Grade B7 material; in case of different material or facing of flange, the

coefficient shall be revised accordingly.

Contractor : _______________________ Name of Technician : ________________________ Date : _____________

Supervisor : _______________________ Signature : ________________________

L = Nut Face Distance Plus 1 Nut Height

A or B


FIGURE N° 4

BOLT UP REPORT FOR FLANGED JOINTS

Download - BD0425A-57A1_Bolt Up Procedure for Critical Flanges

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