API 5L Threaded Fittings are high-strength carbon steel fittings designed for oil, gas, water, and fluid transportation systems. These fittings are manufactured from API 5L grade materials and are widely used in piping systems where threaded connections are required for easy installation, maintenance, and leak-tight joints.
API 5L threaded pipe fittings are suitable for low to high-pressure applications and are commonly supplied with NPT or BSP threads. They offer excellent mechanical strength, dimensional accuracy, and resistance to pressure and harsh environmental conditions.
API 5L threaded fittings are available in multiple grades to meet different strength and pressure requirements. Commonly supplied grades include API 5L X42, X52, X56, X60, X65, X70, and X80.
API 5L X42 and X52 threaded fittings are suitable for moderate-pressure piping systems with good weldability and toughness. API 5L X56 and X60 threaded fittings are widely used in oil and gas transmission and industrial piping applications.
API 5L X65 and X70 threaded fittings are preferred for high-pressure and long-distance pipeline systems due to their superior mechanical properties, while API 5L X80 threaded fittings are used in critical and high-capacity pipeline and infrastructure projects.
Revinox is a trusted supplier of API 5L threaded fittings, offering products in standard and customized sizes with reliable threading and surface finishes to meet project-specific requirements.
API 5L Threaded Fittings, API 5L Carbon Steel Threaded Fittings, API 5L Threaded Fittings Manufacturer in India
Application of API 5L Threaded Fittings
| ● Oil & Gas Pipelines |
| ● Petrochemical & Refinery Industry |
| ● Water Transmission & Supply Systems |
| ● Onshore & Offshore Piping Projects |
| ● Industrial & Process Piping |
Specification Table of API 5L Threaded Fittings
| Specification | Details | |
|---|---|---|
| Standard | API 5L, ISO 3183 | |
| Type | Threaded Pipe Fittings | |
| Thread | NPT / BSP / BSPT | |
| Size | 1/8″ to 4″ (Custom sizes available) | |
| Grades | X42, X52, X56, X60, X65, X70, X80 | |
| Surface Finish | Black, Zinc Plated, Galvanized, Phosphated | |
Delivery Condition – API 5L Threaded Fittings
| PSL | Delivery Condition | Fitting Grades |
|---|---|---|
| PSL 1 | As-forged / Normalized | X42, X52 |
| Thermomechanically processed | X56, X60, X65, X70, X80 | |
| PSL 2 | Normalized | X42N, X52N, X56N, X60N, X65N, X70N, X80N |
| Quenched & Tempered | X52Q, X56Q, X60Q, X65Q, X70Q, X80Q | |
| Thermomechanical formed | X42M, X52M, X56M, X60M, X65M, X70M, X80M |
API 5L Threaded Fitting Grades (Sub-Products)
| ● API 5L X42 Threaded Fittings – Moderate strength piping systems |
| ● API 5L X52 Threaded Fittings – Oil & gas transmission lines |
| ● API 5L X56 Threaded Fittings – Medium to high pressure applications |
| ● API 5L X60 Threaded Fittings – High pressure pipeline systems |
| ● API 5L X65 Threaded Fittings – Long-distance oil & gas pipelines |
| ● API 5L X70 Threaded Fittings – High strength & large diameter pipelines |
| ● API 5L X80 Threaded Fittings – Critical and high-capacity pipeline projects |
Process of Manufacturing – API 5L Threaded Fittings
| Manufacturing Stage | PSL 1 | PSL 2 |
|---|---|---|
| Raw Material (API 5L Plate / Bar) | ✔ | ✔ |
| Hot Forging | ✔ | ✔ |
| Heat Treatment | Optional | Mandatory |
| CNC Machining & Threading | ✔ | ✔ |
| NDT & Mechanical Testing | Basic | Advanced |
| Surface Finishing & Inspection | ✔ | ✔ |
|
Thread Types: NPT / BSP / BSPT Common Fittings: Elbow, Tee, Coupling, Union, Plug, Cap, Reducer |
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Chemical Composition Table – API 5L Threaded Fittings (PSL 1)
| Fitting Grade | C max | Mn max | P max | S max | Nb + V + Ti max |
|---|---|---|---|---|---|
| API 5L X42 / X52 | 0.28 | 1.40 | 0.030 | 0.030 | 0.15 |
| API 5L X56 / X60 | 0.28 | 1.40 | 0.030 | 0.030 | 0.15 |
| API 5L X65 / X70 / X80 | 0.28 | 1.40 | 0.030 | 0.030 | 0.15 |
Chemical Composition Table – API 5L Threaded Fittings (PSL 2)
| Fitting Grade | C max | Mn max | P max | S max | CE (Max) |
|---|---|---|---|---|---|
| X42 / X52 | 0.24 | 1.40 | 0.025 | 0.015 | 0.43 |
| X56 / X60 | 0.22 | 1.50 | 0.025 | 0.015 | 0.43 |
| X65 / X70 / X80 | 0.20 | 1.60 | 0.025 | 0.015 | 0.45 |
Mechanical Properties – API 5L Threaded Fittings
| Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation % |
|---|---|---|---|
| API 5L X42 | 290 | 415 | 21 |
| API 5L X52 | 360 | 460 | 21 |
| API 5L X56 | 390 | 490 | 20 |
| API 5L X60 | 415 | 520 | 20 |
| API 5L X65 | 450 | 535 | 20 |
| API 5L X70 | 485 | 570 | 19 |
| API 5L X80 | 555 | 625 | 18 |
| Fitting Grade | Yield Strength (PSI Min) | Tensile Strength (PSI Min) | Elongation Min % |
|---|---|---|---|
| API 5L X42 Threaded Fittings | 42,000 | 60,000 | 21 |
| API 5L X52 Threaded Fittings | 52,000 | 66,000 | 21 |
| API 5L X56 Threaded Fittings | 56,600 | 71,100 | 20 |
| API 5L X60 Threaded Fittings | 60,200 | 75,400 | 20 |
| API 5L X65 Threaded Fittings | 65,300 | 77,000 | 19 |
| API 5L X70 Threaded Fittings | 70,300 | 82,000 | 18 |
| API 5L X80 Threaded Fittings | 80,000 | 90,000 | 18 |
API 5L Threaded Fittings – Tensile and Yield Properties (PSL1 & PSL2)
API 5L threaded fittings are manufactured from high-strength carbon steel materials to match the mechanical performance of corresponding API 5L pipe grades. These fittings provide excellent tensile strength, yield strength, and durability for high-pressure oil, gas, and fluid transmission systems.
API 5L Threaded Fitting Grades Offered:
- API 5L X42 Threaded Fittings
- API 5L X52 Threaded Fittings
- API 5L X56 Threaded Fittings
- API 5L X60 Threaded Fittings
- API 5L X65 Threaded Fittings
- API 5L X70 Threaded Fittings
- API 5L X80 Threaded Fittings
| Fitting Grade | Yield Strength (PSI Min) | Yield Strength (PSI Max) | Tensile Strength (PSI Min) | Tensile Strength (PSI Max) | Yield / Tensile Ratio (Max) |
|---|---|---|---|---|---|
| X56 | 56,600 | 79,000 | 71,100 | 110,200 | 0.93 |
API 5L Threaded Fittings – Dimensional Tolerances
API 5L threaded fittings are manufactured under strict dimensional controls to ensure precise threading, pressure integrity, and leak-free connections. Tolerances apply to outside diameter, wall thickness, thread form, and concentricity in accordance with applicable API and ASME requirements.
API 5L Threaded Fitting Grades Covered:
- API 5L X42 Threaded Fittings
- API 5L X52 Threaded Fittings
- API 5L X56 Threaded Fittings
- API 5L X60 Threaded Fittings
- API 5L X65 Threaded Fittings
- API 5L X70 Threaded Fittings
- API 5L X80 Threaded Fittings