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API 5L

Date:2017-12-18    View:1550      Tag:API 5L,API 5L steel pipe, API 5L pipe


API 5L pipe Standard aims to gas and water in oil and gas industry for reference, which is used for seamless steel pipe and welded steel pipe,including common port and port,

 pipe socket port and direct stream tube (TFL) and port has for a particular connection tube processing.


API 5L Standard has the provisions of the two product specification levels (PSL1 and PSL2). The two kinds of PSL grade level of the product to the standard stipulated in the technical requirements of different, PSL2 of carbon equivalent, notch toughness, maximum yield strength and tensile strength have mandatory requirements. PSL is short for product specification level.Line pipe product specification level is divided into PSL1 and PSL2, also can say quality grades are divided into PSL1 and PSL2. PSL2 above PSL1, these two levels is not only different inspection requirements, and chemical composition, mechanical performance requirements are different, so the order in API 5 l, the terms of the contract in addition to indicate the specifications and grade of steel usually indicators, must also indicate the level of product specification, namely PSL1 or PSL2. PSL2 in chemical composition, tensile properties, impact energy, and nondestructive testing which strict in PSL1 indicators. PSL1 does not require impact performance, PSL2 all except x80 grade steel, full size 0 ℃ average Akv: longitudinal p j, 41 lateral acuity 27 j.Average grade X80 steel, full size 0 ℃ Akv: longitudinal 101 j, or lateral acuity 68 j. Line pipe should do water pressure test, and the standards are not allowed to nondestructive generation of hydraulic pressure, which is also the API standard and one big difference between our country standard.PSL1 does not require the nondestructive inspection, PSL2 shall by a nondestructive examination.


Chemical Composition (%) 

Standard

Grade

Chemical Composition (%)

PSL1

C

Mn

P

S

B

≤0.28

≤1.20

≤0.030

≤0.030

X42

≤0.28

≤1.30

≤0.030

≤0.030

X46

≤0.28

≤1.40

≤0.030

≤0.030

X52

≤0.28

≤1.40

≤0.030

≤0.030

PSL2

B

≤0.24

≤1.20

≤0.025

≤0.015

X42

≤0.24

≤1.30

≤0.025

≤0.015

X46

≤0.24

≤1.40

≤0.025

≤0.015

X52

≤0.24

≤1.40

≤0.025

≤0.015


Mechanical Properties:

Standard

Steel Grade

Yield Strength(MPa)

Tensile Strength(MPa)

API 5L

                              PSL1

A25

172

310

A

207

331

B

241

414

X42

290

414

X46

317

434

X52

359

455

X56

386

490

X60

414

517

X65

448

531

X70

483

565

                                                                           PSL2

 

241-448

414-758

B

290-496

414-758

X42

317-524

434-758

X46

359-531

455-758

X52

386-544

490-758

X56

414-565

517-758

X60

448-600

531-758

X65

483-621

565-758

X70

552-690

621-827


Dimension Tolerance: 

Specifications

OD(mm)

Wall Thickness(mm)

Pipes Body

OD(mm)

Allowable Tolerance(mm)

OD(mm)

Allowable Tolerance(mm)

≥60.3, S20

±0.75%

≤73.0

+15%, -12.5%

≥60.3, S≥20

±1.00%

73.0, S20

+15%, -12.5%

/

/

73.0, S≥20

+17.5%, -10%

          


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