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Tubing and Casing

Tubing and Casing are used for Conveying gas and oil in both the oil and natural industries

according API SPEC 5CT and ISO11960.

With the normal steel grade API 5CT H40, API 5CT J55, API 5CT K55, API 5CT N80,

API 5CT N80, API 5CT M65, API 5CT L80, API 5CT L80, API 5CT L80, API 5CT C90,

API 5CT C90, API 5CT C90, API 5CT C90, API 5CT C95, API 5CT T95, API 5CT T95,

API 5CT T95, API 5CT T95, API 5CT P110, API 5CT Q125, API 5CT Q125, API 5CT

Q125.

The pipes are used for Conveying gas, water and oil in both the oil and natural industries

This standard specifies the technical delivery conditions for steel pipes (casing, tubing, plain-end casing

liners and pup joints), coupling stock and accessories and establishes requirements for three Product

Specification Levels (PSL-1, PSL-2, PSL-3). The requirements for PSL-1 are the basis of this standard.

The requirements that define different levels of standard technical requirements for PSL-2 and PSL-3, for

all Grades except H-40 and L-80 9Cr, are contained in Annex H.

For pipes covered by this standard, the sizes, masses and wall thicknesses as well as grades and

applicable end-finishes are listed in Tables C.1 to C.3 and Tables E.1 to E.3. By agreement between the

purchaser and manufacturer, this standard can also be applied to other plain-end pipe sizes and wall

thicknesses.

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The main chemical compositions(%) of Tubing and Casing:

Grade Type

C Mn Mo Cr Ni Co P S Si

Min Max Min Max Min Max Min Max Max Max Max Max Max

H40 - - - - - - - - - - - 0.03 0.03 -

J55 - - - - - - - - - - - 0.03 0.03 -

K55 - - - - - - - - - - - 0.03 0.03 -

N80 1.00 - - - - - - - - - - 0.03 0.03 -

N80 Q - - - - - - - - - - 0.03 0.03 -

M65 - - - - - - - - - - - 0.03 0.03 -

L80 1.00 - 0.43a - 1.90 - - - - 0.25 0.35 0.03 0.03 0.45

L80 9Cr - 0.15 0.30 0.60 0.90 1.10 8.00 10.00 0.50 0.25 0.02 0.01 1.00

L80 13Cr - 0.22 0.25 1.00 -

12.00 14.00 0.50 0.25 0.02 0.01 1.00

C90 1.00 - 0.35 - 1.20 0.25b 0.85 - 1.50 0.99 - 0.02 0.01 -

C90 2.00 - 0.50 - 1.90 - Nl - NL 0.99 - 0.03 0.01 -

C95

- 0.45c - 1.90 - - - - - - 0.03 0.03 0.45

T95 1.00 - 0.35 - 1.20 0.25d 0.85 0.40 1.50 0.99 - 0.02 0.01 -

T95 2.00 - 0.50 - 1.90 - - - - 0.99 - 0.03 0.01 -

P110 - -

-

- - - - - - 0.03 0.03 -

Q125 1.00 - 0.35 - 1.00 0.75 - 1.20 - 0.99 - 0.02 0.01 -

Q125 2.00 - 0.35 - 1.00 NL - NL - 0.99 - 0.02 0.02 -

Q125 3.00 - 0.50 - 1.90 NL - NL - 0.99 - 0.03 0.01 -

Q125 4.00 - 0.50 - 1.90 NL - NL - 0.99 - 0.03 0.02 -

Note:

a, product uses oil quenching, L80 grade carbon content of the upper limit may be increased to 0.50%.

b If the wall thickness

c If the product oil quenching, the C95 grade carbon content limit may be increased to 0.55%.

d If the wall thickness

NL-Not limit, but must show the element content in the product by reported.

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Mechanical Properties of Tubing and Casing：

Grade Type TEUL(%)

Yield strength

（MPa）

Tensile

(MPa) Hardness

S.W.T.

（mm） HRCb

Min Max Min Min Max

H40 - 0.5 276 552 414 - - - -

J55 - 0.5 379 552 517 - - - -

K55 - 0.5 379 552 655 - - - -

N80 1 0.5 552 758 689 - - - -

N80 Q 0.5 552 758 689 - - - -

M65 - 0.5 448 586 586 22 235 - -

L80 1 0.5 552 655 655 23 241 - -

L80 9Cr 0.5 552 655 655 23 241 - -

L80 13Cr 0.5 552 655 655 23 241 - -

C90 1、2 0.5 621 724 689 25.4 255 ≤12.70 3

C90 1、2 0.5 621 724 689 25.4 255 12.71~19.04 4

C90 1、2 0.5 621 724 689 25.4 255 19.05~25.39 5

C90 1、2 0.5 621 724 689 25.4 255 25.4 6

C95 - 0.5 655 758 724 - - -

T95 1、2 0.5 655 758 724 25.4 255 ≤12.70 3

T95 1、2 0.5 655 758 724 25.4 255 12.71~19.04 4

T95 1、2 0.5 655 758 724 25.4 255 19.05~25.39 5

T95 1、2 0.5 655 758 724 25.4 255 25.4 6

P110 - 0.6 758 965 862 - - - -

Q125 1~4 0.65 862 1034 931 b - ≤12.70 3

Q125 1~4 0.65 862 1034 931 b - 12.71~19.04 4

Q125 1~4 0.65 862 1034 931 b - >=19.05 5

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Note:

a Dispute, the Rockwell hardness of the laboratory should be used as the arbitration.

b Hardness limit is not specified, but according to the provisions of 7.8 and 7.9 in the most amount of

change as production control.

TEUL: Total elongation under load

SWT: Specified wall thickness

HRC Allowable hardness change

Packing:

Packed in wooden crates, wrapped in plastic, and suitably protected for sea-worthy delivery or as requested.

Both ends of each crate will indicate the order no., heat no., dimensions, weight and bundles or as requested.

How to packing the seamless pipes?

Delivery:

Pipes are supplied in hexagonal bundles or round bundles tied with steel strip.

Weight of bundle – up to 5000 kg upon request of customer.

Each bundle is furnished with three tags.

Standard:

API 5CT PSL1, PSL2, PSL3

ISO11960

Application:

Conveying gas and oil in both the oil and natural industries

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Related information:

GB/T18984-2003 standard specification

Low-temperature heat exchanger tubes seamless steel pipe

What is pipe elbow?

What is pipe fitings?

API Spec 5CT

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