Stainless Steel Thick-walled Pipe

What is thick-walled stainless steel pipe?

Thick-walled stainless steel pipe has a wall-to-OD ratio typically above 10%, designed for high-pressure, high-temperature, or high-stress applications. It is produced by cold-drawing or hot-extrusion from solid billets and is used in hydraulic cylinders, pressure vessels, and chemical reactors.

What pressure ratings do thick-walled stainless steel pipes support?

Working pressure depends on OD, wall thickness, and grade. Working pressure should be calculated from OD, wall thickness, grade, design code, temperature, and corrosion allowance for each project. Pressure calculations and hydrostatic test certificates are provided with each order.

What size range is available for thick-walled stainless steel pipe?

Thick-walled stainless steel pipe is available in outer diameter from 6 mm to 2000 mm with wall thickness of 5 mm or above. Grades include 304, 316L, 321, 316Ti, and duplex 2205/2507. Customer drawings with specific bore and OD combinations are accepted.

What standards apply to thick-walled stainless steel pipe?

Our thick-walled pipes comply with ASTM A312, ASTM A358, EN 10216-5, and EN 10217-7. Available testing includes hydrostatic test, ultrasonic inspection (UT), and PMI (positive material identification) per customer project specification.

Which grade is best for high-pressure stainless steel pipe service?

Grade 316L is standard for high-pressure corrosion-resistant service. Grade 321 or 316Ti is recommended above 500°C for stabilized creep resistance. Duplex 2205 offers approximately double the yield strength of 304/316L, enabling thinner walls and lighter weight at equivalent pressure rating.