API 5L X52 BUTTWELD FITTINGS
API 5L X52 Buttweld fittings are high-strength carbon steel piping components designed for high-pressure pipeline applications. Also known as L360 grade, they provide a minimum yield strength of 52 Ksi (360 MPa) with excellent weldability, toughness, and durability. These fittings are manufactured in accordance with API 5L and ISO 3183 standards.
API 5L X52 buttweld fittings are widely used in onshore and offshore oil & gas pipelines, water transmission systems, petrochemical plants, and power projects. They are available in elbows, tees, reducers, caps, and stub ends across a wide range of sizes and schedules.
API 5L X52 Buttweld Fittings, API 5L X52 BW Fittings, API 5L X52 Elbow, Tee, Reducer & Cap, API 5L X52 PSL2 Buttweld Fittings, API 5L X52 Buttweld Fittings Manufacturer In India
Application of API 5L X52 Buttweld Fittings
| ● Oil & Gas Transmission Pipelines |
| ● Water Supply & Distribution Systems |
| ● Petrochemical & Refinery Piping |
| ● Power Plants & Heavy Engineering |
Specification Table of API 5L X52 Buttweld Fittings
| Specification | Details | |
|---|---|---|
| Product Specification | API 5L, PSL 1, PSL 2 | |
| Size | 1/2″ to 48″ (ASME B16.9 / MSS SP-75) | |
| Schedule | SCH 10, SCH 40, SCH 80, SCH 160 up to SCH XXS | |
| Type | Elbow, Tee, Reducer, Cap, Stub End | |
| Manufacturing Standard | ASME B16.9, MSS SP-75 | |
| Grade | API 5L X52 / L360 | |
Delivery Condition
| PSL | Delivery Condition | Fitting Grade |
|---|---|---|
| PSL 1 | As-rolled, normalized | X52 |
| PSL 2 | Normalized, normalized & tempered | X52N |
| Quenched and tempered | X52Q | |
| Thermomechanically processed | X52M |
Manufacturing Process
API 5L X52 buttweld fittings are produced from seamless or welded pipes using hot forming, cold forming, or machining methods. Heat treatment is carried out as per PSL 1 or PSL 2 requirements to achieve the required mechanical properties. Each fitting is tested and inspected in accordance with API 5L and dimensional standards.
| Type of Fitting | PSL 1 | PSL 2 | ||
|---|---|---|---|---|
| Grade B | X52 | X52N | X52Q / X52M | |
| Elbow | ✔ | ✔ | ✔ | ✔ |
| Tee | ✔ | ✔ | ✔ | ✔ |
| Reducer | ✔ | ✔ | ✔ | ✔ |
| Cap | ✔ | ✔ | ✔ | ✔ |
| Stub End | ✔ | ✔ | ✔ | ✔ |
|
Manufactured as per ASME B16.9 / MSS SP-75 Suitable for onshore and offshore pipeline applications |
||||
Chemical Composition – API 5L X52 Buttweld Fittings (PSL 1)
| Grade | C | Mn | P | S | V | Nb | Ti |
|---|---|---|---|---|---|---|---|
| X52 | 0.26 | 1.40 | 0.030 | 0.030 | d | d | d |
|
Cu ≤ 0.50%, Ni ≤ 0.50%, Cr ≤ 0.50%, Mo ≤ 0.15% Nb + V ≤ 0.06%, Nb + V + Ti ≤ 0.15% No intentional Boron; residual B ≤ 0.001% |
|||||||
Chemical Composition – API 5L X52 Buttweld Fittings (PSL 2)
| Grade | Chemical Composition % (Max) | Carbon Equivalent | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| C | Si | Mn | P | S | V | Nb | Ti | CE IIW | CE Pcm | |
| X52 | 0.26 | 0.45 | 1.60 | 0.030 | 0.030 | d | d | d | 0.43 | 0.25 |
|
Nb + V ≤ 0.06%, Nb + V + Ti ≤ 0.15% Cu ≤ 0.50%, Ni ≤ 0.30%, Cr ≤ 0.30%, Mo ≤ 0.15% No intentional Boron; residual B ≤ 0.001% |
||||||||||
Mechanical Properties – API 5L X52 Buttweld Fittings
| Grade | Yield Strength (Min) | Tensile Strength (Min) | Elongation |
|---|---|---|---|
| X52 | 52,000 PSI (360 MPa) | 66,700 PSI (460 MPa) | As per API 5L |
| Applicable for PSL 1 & PSL 2. Mechanical properties refer to parent material. | |||
Dimensional Tolerances – API 5L X52 Buttweld Fittings
| Parameter | Tolerance |
|---|---|
| Nominal Wall Thickness | −12.5% (minimum), no positive tolerance |
| Local Wall Thickness | Permitted if minimum thickness is maintained |
| Weld Area Thickness | Not less than specified minimum |
| Tolerances as per ASME B16.9. Special limits on request. | |