API SPEC 5L / 47TH EDITION (2026) | L245 / GRADE B | PSL1 & PSL2
LINE PIPE FOR ENGINEERED TRANSPORT SYSTEMS
Source API 5L Grade B / L245 line pipe for pipeline projects and distribution networks. Share your outside diameter, nominal wall, production method, coating needs and project documents to receive a quotation aligned with your requisition.
Compare PSL1 and PSL2 requirements ↓Order line pipe by production route, product specification level and fully defined project dimensions—not grade name alone.
| Parameter | Purchase specification |
|---|---|
| Product | API 5L Grade B Line Pipe / L245 |
| Latest API standard | API Spec 5L, 47th edition, published June 2026; confirm contractual edition and amendments |
| Product specification level | PSL1 or PSL2; state the selected level explicitly |
| Pipe manufacture | Seamless (SMLS), high-frequency welded (HFW/ERW), or submerged-arc welded (SAW) subject to grade / dimension / mill qualification |
| Size designation | Actual outside diameter (OD) × specified wall thickness (WT), typically mm or inch |
| Nominal schedule | Optional NPS / SCH dimensional reference, where appropriate; actual OD × WT governs the RFQ |
| Length | Mill / random or fixed cut length per project drawing and agreed mill production |
| Delivery condition | Confirm any PSL2 grade suffix and heat-treatment / delivery-condition rules |
| Ends | Plain, beveled, mechanically prepared, or ends specified for field welding |
| Surface / external protection | Mill finish or ordered anti-corrosion coating; compatible coating standards and inspection agreed separately |
| Testing | Chemical and mechanical tests, hydrotest, NDE, toughness and project-specific examination as applicable |
| Documents | MTC with pipe / heat traceability, production and inspection records; project document list as ordered |
| Service | Pipeline transportation applications; engineering selection governs pressure, environment and temperature |
API 5L has two product specification levels. Mill capability, grade suffix, applicable edition and line pipe dimensions must be confirmed for the offered material.
The same Grade B / L245 name can cover different manufacturing, chemical, test and documentation conditions.
Material is ordered against the PSL1 requirements of the chosen API 5L edition. It is commonly specified when the project does not call for the additional PSL2 control framework.
PSL2 introduces more defined controls and may require a specific delivery condition or grade suffix. Impact testing, chemistry, yield-to-tensile relationships and NDE depend on the applicable rules and purchase specification.
Send the pipeline material requisition and any client inspection specification for review before pricing.
These values help identify Grade B; the contractual API edition, PSL and delivery condition determine final acceptance.
| Requirement | Procurement reference |
|---|---|
| Common Grade B / L245 minimum yield reference | 245 MPa (35,500 psi) |
| Common Grade B / L245 minimum tensile reference | 415 MPa (60,200 psi) |
| PSL1 designations | Grade B or L245; tensile/elongation acceptance per the contracted edition |
| PSL2 designations | Often BR / BN / BQ / BM or L245R / L245N / L245Q / L245M; verify allowed condition |
| PSL2 strength limits | Minimum and maximum yield/tensile values depend on edition and test / product conditions |
| Elongation and Y/T ratio | Evaluate with specimen geometry, pipe size and product level; no single universal percentage |
| Toughness and service-specific tests | Request Charpy, HIC, SSC, DWTT and supplementary tests only where applicable |
245 MPa and 415 MPa are widely used Grade B / L245 minimum strength reference values; confirm the exact test requirements in API 5L 47th edition or the ordered earlier edition.
| Element / condition | Illustrative older limit |
|---|---|
| Carbon C, PSL1 SMLS | ≤0.28% — 46th-edition reference only |
| Carbon C, PSL1 welded | ≤0.26% — 46th-edition reference only |
| Manganese Mn, PSL1 | ≤1.20% before prescribed adjustment rules — 46th-edition reference |
| Phosphorus P, PSL1 | ≤0.030% — 46th-edition reference |
| Sulfur S, PSL1 | ≤0.030% — 46th-edition reference |
| PSL2 chemistry | Varies with the selected suffix, process and edition; confirm carbon, manganese, microalloy elements and CE |
| 47th-edition chemistry | Check directly against the licensed current standard and the certified heat analysis |
The chemistry figures above are explicitly identified as 46th-edition PSL1 reference data, not unconditional 47th-edition guarantee values. Final acceptance uses the chosen specification edition and MTC.
Choose the manufacturing method that fits your diameter, wall thickness, inspection plan and project approval list.
Pipe without a longitudinal weld seam. Specify manufacturing process, heat treatment, dimensional tolerances, end preparation and the required inspection record.
Formed pipe using a longitudinal high-frequency weld. Quality requirements include seam treatment, dimensional control and applicable weld-seam examination.
SAW routes may suit larger diameters subject to mill qualification. Confirm weld configuration, pipe geometry, inspection scope and project approval.
Use actual pipe dimensions for ordering. NPS / Schedule examples are a reference where the project uses ASME dimensional terminology.
| Reference size | OD (mm) | SCH 40 WT (mm) | SCH 80 WT (mm) |
|---|---|---|---|
| NPS ½ | 21.3 | 2.77 | 3.73 |
| NPS 1 | 33.4 | 3.38 | 4.55 |
| NPS 2 | 60.3 | 3.91 | 5.54 |
| NPS 4 | 114.3 | 6.02 | 8.56 |
| NPS 6 | 168.3 | 7.11 | 10.97 |
| NPS 8 | 219.1 | 8.18 | 12.70 |
NPS and SCH dimensional reference only; verify the applicable pipe dimensional standard and tolerance. For API 5L RFQs, state the specified OD × WT in mm or inches explicitly.
Wall thickness, grade, outside diameter and manufacturing route determine mill feasibility and project costs.
An inspection and test plan (ITP) can change pricing, manufacturing and delivery for the same nominal Grade B pipe.
Check heat analysis, tensile / yield results, elongation and any required carbon-equivalent calculation against the ordered edition.
Identify the hydrotest requirement, pressure, hold time and documentation under the contractual standard.
Specify the approved method, coverage, personnel qualification and weld-seam inspection for the chosen manufacturing route.
For PSL2 and special service, determine required Charpy / other toughness tests by product and project.
Require heat or production-traceable identifiers with dimensions, PSL, grade, route and available test records.
Treat sour, offshore and CO₂ transport as special project requirements needing separate engineering review and acceptance.
Use Grade B when the pipeline designer and project material standard approve its grade, manufacture and product level.
Onshore pipeline systems with approved pipeline material specifications and inspection plans.
Gathering and transfer networks requiring defined line pipe size, weld route and documentation.
Projects specifying line pipe to API requirements, with local design and regulatory approval.
Project-specific steel pipeline networks where the engineering specification calls for API 5L.
Bare pipe procurement together with a separate FBE, 3LPE or other agreed coating system.
Pipeline-component procurement that needs cutting, beveling and traceable finished lengths.
Design temperature, pressure, fluid composition, weldability, installation method and any sour-service or CO₂ specification are evaluated by the responsible engineer.
For a project quotation, send the pipeline datasheet, approved manufacturer requirements and desired coating. We will confirm sourcing and inspection conditions.
Estimate bare-steel pipe weight from actual OD, wall thickness, length and piece count; use quick NPS / Schedule examples if useful.
Quick selections fill nominal values; you can override outside diameter and wall thickness for the actual project pipe.
Nominal bare steel density: 7,850 kg/m³. Calculation excludes coatings, end protectors and shipping packaging; actual mill mass and tolerances differ.
Calculated from nominal OD and WT. For final freight use the confirmed packing list.
Confirm the pipe mill's qualified route and traceability rather than assuming the same production line for every size.
Include OD, wall, PSL, process and test requirements so suitable production options can be checked.
A procurement partner should help align grade, route, inspection and shipment without suggesting unverified specialty-line-pipe stock.
We review grade, PSL, standard edition, dimensions, documents and shipment requirements before confirming a pipe offer.
Discuss heat/pipe identification, MTC, third-party inspection and test packages with the purchase order.
Our company reports 8M MT annual steel output and 1M MT regular steel inventory overall. Grade B line pipe stock is confirmed separately.
Coordinate pipe lengths, end protection, bundling, markings, destination and requested shipment documents.
Send the pipeline requisition with the required delivery period and inspection plan.
Inspection obligations should be agreed before purchase, especially for PSL2 and supplementary service requirements.
Order processing and protective requirements as separate line items so your material quotation stays unambiguous.
Pipe diameter, manufacturing process, PSL2 requirements and coating can affect mill minimums and production lead time.
Send an itemized inquiry with OD × WT, individual pipe length, total tonnage, manufacturing route and inspection specification. Our team can check the appropriate supply route and return available order conditions.
Secure pipe bundles and preserve identification so the receiving site can match material to its certificate.
Similar strength numbers do not make different pipe standards interchangeable.
| Grade / Standard | Positioning | Selection note |
|---|---|---|
| API 5L Grade B / L245 | Line pipe | Pipeline transportation; PSL1 / PSL2, approved route and inspection plan |
| API 5L X52 / L360 | Higher-strength line pipe | Minimum yield class 360 MPa; choose only when project material requirement calls for X52 |
| API 5L X60 / L415 | Higher-strength line pipe | Minimum yield class 415 MPa; grade selection follows pipeline design |
| ASTM A106 Grade B | Seamless process piping | High-temperature seamless process piping specification; different acceptance scope |
| ASTM A53 Grade B | General steel pipe | Seamless / welded black or galvanized pipe, governed by ASTM A53 |
| ASTM A333 Grade 6 | Low-temperature pipe | Grade with low-temperature notch toughness requirements; selected by code and service |
Compare alternative grade classes and product standards before sending the next requisition.
Answers to frequent questions about the latest specification, pipe forms, material documents and line-pipe ordering.
It is line pipe in the L245 / Grade B strength class ordered under API Specification 5L for pipeline transport systems. The purchase must specify PSL, manufacturing route, dimensions and inspection requirements.
API announced the 47th edition on 2 June 2026. Your purchase contract should identify the required edition and any project-specific supplements.
L245 is the metric grade designation associated with Grade B. A common minimum yield strength reference is 245 MPa; evaluate all actual acceptance requirements under the ordered edition and PSL.
The product specification levels define different control and acceptance requirements. PSL2 generally has additional conditions for chemistry, grade/delivery designation, mechanical testing, toughness and inspection. Confirm the edition-specific requirements.
No. API 5L includes both seamless and welded line pipe. Specify SMLS, HFW/ERW, SAW or another approved process according to your project requirements and available mill qualification.
Schedule numbers can describe reference wall thickness for particular NPS sizes. In API 5L purchase documentation, give the actual outside diameter and specified wall thickness, length and dimensional tolerance.
No. These are well-known minimum strength reference values. Actual chemistry, test samples, maximum strength where applicable, toughness and NDE depend on PSL, edition and project specification.
No. Sour-service material selection requires the relevant project specification and applicable annex / testing provisions. HIC, SSC and environmental suitability must be separately evaluated and documented where required.
Suitability depends on pipeline engineering, stream composition, operating conditions and project codes. API 5L 47th edition adds CO₂-related provisions, but Grade B and PSL designation alone do not establish approval for a particular CO₂ service.
Ask for MTC, chemical analysis, tensile results, hydrostatic testing, weld/body NDE, required toughness testing, pipe-marking traceability and any agreed third-party inspection.
The page calculator uses the steel annulus area from OD and WT, nominal density 7,850 kg/m³, pipe length and piece count. Coatings, end protection, shipping packaging and dimensional tolerances are excluded.
State API edition, grade, PSL and suffix where needed, manufacturing route, OD × WT, length, tonnage, coating, testing, certificate format, delivery destination and target shipment date.
Send your pipeline material requisition with PSL, outside diameter, wall thickness, manufacturing route, tonnage, inspection requirements and destination. We will review the specifications and confirm a quotation based on available supply.
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Send your required grade, dimensions, quantity and destination. Our team will review the inquiry.
