API 5L Seamless Line Pipe Specifications

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The American Petroleum Institute specification API 5L covers seamless and welded steel line pipe.  This is steel pipe for pipeline transportation systems in the petroleum and natural gas industries.  API 5L is suitable for conveying gas, water, and oil.  Size range is limited only by manufacturer’s capabilities.

Specifications for API 5L adhere to the International Organization for Standardization ISO 3183, which standardizes pipeline transportation systems within the materials, equipment and offshore structures for petroleum, petrochemical, and natural gas industries.  The technical committee authoring the standards recognized that there are two basic Product Specifications Levels (PSL) of technical requirements and therefore developed PSL 1 and PSL 2.  PSL 1 is a standard quality for line pipe where PSL 2 contains additional chemical, mechanical properties, and testing requirements.

Grades covered by this specification are A25 ,A ,B (and the following “X” Grades), X42, X46, X52, X56, X60, X65, X70, X80.  The two digit number following the “X” indicates the Minimum Yield Strength (in 000’s psi) of pipe produced to this grade.

Federal Steel Supply stocks a full range of API 5L X52 PSL-1 & PSL-2 line pipe in seamless.

Sizes
Nominal Pipe Size 2″ to 24″ O.D.
Wall Thickness – Schedule 10 through 160, STD, XS, XXS.


Standard                                            API 5L

Product Specification Level             PSL-2

Steel grade                                         X52

Chemical Properties %

PSLC, a   Mn aP       S SiVNbTiOtherCEIIWCEpcm
10.241.400.0250.0150.450.100.050.04b,c.0430.025
20.281.400.030.03–bbb–––

 Mechanical Properties        

                                                                        API 5L PSL-1 X52                API 5L PSL-2 X52

Tensile strength, min /max, psi (MPa)         66,700(460)/ n/a66,700 / 110,200

Yield strength, min /max, psi (MPa)            52,000 (300)/n/a          52,000 / 76,900

  1. a.      For each reduction of 0.01% below the specified maximum concentration for carbon, an increase of 0.05% above the specified maximum concentration for manganese is permissible, up to a maximum of 1.65% for > grades B, but < X52; up to a maximum of 1.75% for grades >X52, but <X70; and up to a maximum of 2.00% for grade X70
  2. b.      The sum of the niobium, vanadium, and titanium concentrations shall be < 0.06%.
  3. c.       Unless otherwise agreed, 0.50% maximum for copper, 0.30% maximum for nickel, 0.30% maximum for chromium, and 0.12% maximum for molybdenum.

Select differences between PSL 1 and PSL 2:

PSL1PSL2
CVN impact (Charpy) testingNone requiredRequired for all grades
Nondestructive inspection of seamlessOnly when purchaser specifies   SR4SR4 mandatory
CertificationCertificates when specified per SR15Certificates (SR 15.1) mandatory
TraceabilityTraceable only until all tests are passed, unless SR15 is specifiedTraceable after completion of tests (SR 15.2) mandatory
Hydrostatic TestRequiredRequired

What’s Underground Coated Steel Pipe

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Many individuals usually confused about concerning the plastic-coated pipes and 3PE anti-corrosive pipes because they are extremely comparable to their look. The covered plastic pipeline, also known as underground covered steel pipe or steel-plastic composite steel pipeline, is the steel pipeline which is melted a natural layer with a thickness of 0.5 ~ 1.0 mm on the inner and also external walls such as customized polyethylene (PE), ethylene-acrylic copolymer (EAA), epoxy (EP) powder, non-toxic polypropylene (PP) or non-toxic polyvinyl chloride (PVC). This below-ground covered steel pipe incorporates the advantages of steel and plastics. It not only has the advantages of high strength, very easy link, water effect resistance and so forth however likewise terminates the downsides such as easy rust, pollution, scaling, reduced toughness of the plastic pipe as well as inadequate fire-fighting efficiency of steel pipe in water. It offers a lengthy life expectancy and more financially with layout life can get to 50 years.

What's Underground Coated Steel Pipe

Coted pipe
Firefighting covered steel pipeline is the most generally utilized plastic layered steel pipeline, with a steel pipeline as the base pipe, the outer wall surface finishing high adhesion, effect resistance, deterioration resistance weather resistance kind of thermosetting powder finish and also the inner wall surface coating food grade sanitary polycarbonate powder finishing, and after that made by sandblasting and chemical therapy, preheating, inner paint, external painting, curing and also various other post-treatment.

The functions of below ground covered steel pipeline
The pipeline wall is smooth as well as burr-free, suitable for the underground or one more humid environment, can hold up against very high or reduced temperatures.
It have a solid capacity to stand up to stress, also can withstand the stress of 6Mpa.
With superb anti-interference ability, it can successfully evaluate the signal interference from the outside.
The covering itself additionally has good electric insulation and does not create corrosion.

The Specification of underground coated steel pipe
Color: black, gray, blue, red, white, eco-friendly;
Layer thickness: PE( customized polyethylene) coating density is 400um– 1000um, EP( epoxy material) is 100um– 400um;
Layer method: Hot-dip EP, epoxy internal/external spraying;
Specification: DN15– DN1660;
Ambient temperature: -30 ℃ to 120 ℃;.
Link: cord clasp (DN15-DN100), groove (DN65-DN400), flange (ideal for any size), welding type, bimetal link, outlet, pipeline joint, securing connection, and so on

Applications of underground layered steel pipeline.

  1. The plastic-coated pipeline can be utilized in all kinds of flowing water system (civil flowing water as well as industrial circulating water), fire water system, structure water system and also water drainage transportation, city sewage pipeline;.
  2. Gas discharge, mud sharing, drainage as well as air flow system in the coal mine;.
  3. The chemical anticorrosive pipeline transportations various chemical fluids, such as acid, antacid and other harsh media.
  4. Utilized for the security of hidden pipelines as well as interaction wires of electric cords as well as cables.
  5. It can ensure the normal operation of the water blood circulation system of central air conditioning in the HVAC circulation system of air conditioning.