API 5L pipes – Grade B–X70 line pipe ISO 3183
API 5L is the international specification for line pipe in oil, gas and water transport – from Grade B up to high-strength grades such as X60, X65 and X70. ROHRLINE supplies API 5L pipes and tubes to ISO 3183 with EN 10204 3.1 inspection certificates – worldwide.
Application & properties
API 5L is the international specification for line pipe in oil, gas and water transport – from Grade B up to high-strength grades such as X60, X65 and X70.
- Oil and gas pipelines
- Water and media transport lines
- Trunk and gathering lines
Tell us the medium, temperature and pressure – we will check the grade with you.
Chemical composition
Typical values in wt.-% per API Spec 5L / ISO 3183 (heat analysis).
| Element | Content (%) |
|---|---|
| C | ≤ 0.24 |
| Mn | ≤ 1.40 |
| P | ≤ 0.025 |
| S | ≤ 0.015 |
| Type | PSL1 / PSL2 |
| Manufacture | seamless / welded |
Mechanical properties
Typical values at room temperature per API Spec 5L / ISO 3183.
| Property | Value |
|---|---|
| Yield strength SMYS | 245–485 MPa (Grade B–X70) |
| Tensile strength Rm | ≥ 415–570 MPa |
| Grades | B · X42 · X52 · X60 · X65 · X70 |
| Connections | bevelled / plain end |
Standards, equivalents & product forms
| Topic | Detail |
|---|---|
| Standards | API 5L (ISO 3183) |
| ASME/ASTM equivalent | Grade B ~ ASTM A53 Gr. B · A106 Gr. B |
| Material no. | Line pipe |
| Short name / aka | Oil & gas pipeline · Grade B–X70 |
We supply API 5L as pipes, flanges and fittings – seamless or welded, on request with an EN 10204 3.1 / 3.2 mill certificate.
Supply programme & machining
| Item | Details |
|---|---|
| Dimensions (pipe) | Programme range: outside Ø 10.2 to 2,032 mm · DN 6 to DN 2000 · all standard wall thicknesses; available sizes depend on grade and standard |
| As flange & fitting | DN 10 to DN 1200 · PN 6 to PN 400 · Class 150 to Class 2500 to ASME B16.5 (to NPS 24), above that ASME B16.47 to Class 900 |
| Lengths & cutting | Mill lengths, sawn fixed lengths and fitting pieces from 0.1 to 12 m – sawn and bevelled |
| Minimum quantity | From a single item – from one fitting piece to the complete piping system |
| Availability | Common grades and sizes available at short notice, special sizes procured per project |
| Lead time | Standard sizes usually 3–5 working days; the binding date is confirmed with the quote |
| Machining | Sawing and bevelling, roll grooving for grooved couplings, threading to EN 10226, drilling, facing, bending with special radii |
| Surface | Blasting Sa 2½, primer and top coat, powder coating in RAL shades, galvanising to EN ISO 1461, PE coating to DIN 30670 |
| Certificates | Mill certificate 2.2, inspection certificate 3.1 to EN 10204 (standard with machining), 3.2 with notified body on request |
| Testing | Non-destructive testing by ultrasound, eddy current and X-ray, pressure test report on request |
These figures describe our supply programme. Which size is actually available in this grade is clarified with your enquiry – you usually receive the quote the same day.
We clarify availability, price and inspection certificate with your enquiry.
Frequently asked questions about API 5L
What do X52, X60 or X70 mean in API 5L?
The number gives the minimum yield strength (SMYS) in ksi – X52 ≈ 360 MPa, X60 ≈ 415 MPa, X70 ≈ 485 MPa.
What is the difference between PSL1 and PSL2?
PSL2 imposes stricter requirements on chemistry, strength and testing than PSL1.
Does ROHRLINE supply API 5L line pipe?
Yes – seamless or welded in the common grades, on request with EN 10204 3.1 mill certificate.
Which dimensions and certificates does ROHRLINE supply for API 5L?
ROHRLINE supplies API 5L in the following range: Programme range: outside Ø 10.2 to 2,032 mm · DN 6 to DN 2000 · all standard wall thicknesses; available sizes depend on grade and standard. Documentation: Mill certificate 2.2, inspection certificate 3.1 to EN 10204 (standard with machining), 3.2 with notified body on request. Delivery worldwide; the binding date is confirmed with the quotation.
Typical industries
Request API 5L?
Grade, standard, size, pressure rating and quantity are enough – on request with an EN 10204 3.1 / 3.2 mill certificate. Your quote usually the same day.
All data are typical values per the relevant API Spec 5L / ISO 3183 for first orientation – without warranty. The applicable standard and the mill certificate of the delivery are decisive.