Natural Gas Infrastructure SSAW Spiral Welded Pipe API 5L Standard

Large Diameter Spiral Welded Pipe SSAW

Specifications

Large diameter spiral welded pipe (SSAW) is manufactured by helically forming steel coils into a cylinder and welding the seams using double-sided submerged arc welding (SAW). This process allows for cost-efficient production of pipes with diameters typically ranging from 219mm to 3500mm. Highly versatile, these pipes are widely used in municipal water, oil and gas, and structural construction projects due to their high strength, durability, and flexible production capabilities.

Large Diameter Spiral Welded Pipe Chemical Composition

Sources American Standard API SPECIFICATION 5L Table 4 — Chemical composition for PSL 1 pipe with t ≤ 25,0 mm (0.984 in)

Large Diameter Spiral Welded Pipe Mechanical Properties

Sources American Standard API SPECIFICATION 5L Table 6 — Requirements for the results of tensile tests for PSL 1 pipe

Large Diameter Spiral Welded Pipe Manufacturing process

Raw Material Inspection → Strip Joining → Pre-forming Treatment → Conveyor Control → Roll Forming → Gap Control → Welding → NDT (Non-Destructive Testing) → Single Pipe Cutting → Batch Inspection → Defect Repair → Weld Inspection → Hydrostatic Testing → End Finishing

Large Diameter Spiral Welded Pipe Application

• High-pressure long-distance hydrocarbon transmission pipelines
• Natural Gas Infrastructure
• Municipal Water Supply Systems
• Large diameter water transmission mains
• Regional water transfer and diversion projects
• Potable water distribution backbone networks
• Raw water intake lines for treatment plants
• Hydroelectric Power Generation
• Marine and Offshore Applications

Large Diameter Spiral Welded Pipe Packing & Loading

→SSAW Pipe is transported in containers

(Nesting Packaging): Large-diameter SSAW pipes can be nested within one another, similar to Russian dolls, to utilize the internal space of larger pipes and minimize the volume of the cargo. This is a "game-changer" for reducing freight expenses and improving supply chain efficiency.

SSAW Pipe is transported by bulk carrier

Jinxi Steel, a professional manufacturer of steel pipes and fittings, is located in Changsha City. Guided by the scientific development concept, Jinxi Steel will comprehensively reform and develop, adhere to the path of quality and efficiency under the guidance of science and technology, persist in disruptive development, implement a strategy of focusing on Central China and developing Southwest China, strive to achieve a production scale of over 10 million tons and annual sales revenue of over 30 billion yuan, and join the ranks of the world's top 500 steel enterprises.

Jinxi Steel enjoys a superior geographical location and convenient transportation, possessing spacious modern plants and multiple steel pipe and fitting manufacturing plants. The company specializes in the production of high-tech, high-value-added steel. Meanwhile, Jinxi Steel has become a major steel supplier for industries such as automobiles, home appliances, containers, oil and gas exploration, and pressure vessels, exporting its products to more than 40 countries and regions in the Middle East, South America, Europe, Africa, and Asia.

Storing 200,000 tons of various steel products in a 500,000-square-meter warehouse, we have built first-class seamless steel pipe, high-frequency welding, and submerged arc welding hot rolling and cold drawing production lines. The company consistently adheres to standards from authoritative organizations such as GB, ASTM, DIN, JIS, and ISO. Annual production of seamless and welded steel pipes of various standards reaches 500,000 tons. Our products are widely used in industries such as petroleum, chemical, pharmaceutical, papermaking, shipbuilding, food, nuclear power, and ammunition. Furthermore, we employ various testing methods to inspect finished products, including eddy current testing, ultrasonic testing, and spectral analysis. In addition, we have obtained ISO9001:2008, SGS, BV, RINA, and ISO14001:2004 certifications, ensuring the high quality of our products.