What is Heat resistant stainless steel pipe?

What is Heat resistant stainless steel pipe?

​​Heat resistant stainless steel pipe refers to stainless steel piping engineered to withstand continuous operating temperatures up to 1100°C (for austenitic grades like 310S) or 850°C (for duplex grades like 2205), with key variants including 310S (25% Cr, 20% Ni), 309S (23% Cr, 15% Ni), and 2205 (22% Cr, 5.5% Mo, 6% Ni) offering oxidation resistance in air up to 1000°C, 950°C, and 850°C respectively, mechanical strength retention exceeding 40% of room temperature yield strength at 800°C, and corrosion resistance to sulfidation, carburization, and thermal cycling in high-temperature environments such as industrial furnaces, petrochemical reactors, and exhaust systems.​

 

Common Grades and Their Uses

310S Stainless steel is a combination of good strength and corrosion resistance in temperature up to 2100oF (1149℃). Due to its relatively high chromium and nickel content it is superior in most environments to 304 or 309 stainless.
309S High corrosion-resistant, chromium nickel grade with carbon limited to .08 to reduce carbon precipitation during welding. Maximum Recommended Service Temperature Continuous 1100℃ /Intermittent 980℃
304H the carbon content is controlled to a range of 0.04-0.08 to provide improved high temperature strength to parts exposed to temperatures above 800°F (427℃)
321H advantage an excellent resistance to intergranular corrosion following exposure to temperatures in the chromium carbide precipitation range from 800 to 1500°F (427℃ to 816°C).
347H in higher elevated temperature allowable stresses for these stabilized alloys for ASME Boiler and Pressure Vessel Code applications. The 321 and 347 alloys have maximum use temperatures of 1500°F (816°C)

 

​​We supply both seamless and welded tubes meeting shell and tube heat exchanger requirements: ASTM A213/A213M seamless tubes, ASTM A556M-88/ASME SA556 heater tubes, and ASTM A249/A249M welded tubes, with all tubes available in size range of outer diameter (OD) 6.35mm - 76.2mm × wall thickness 0.91mm - 3.25mm, and heat exchanger tubes conforming to Standard Wire Gauge (SWG) or Birmingham Wire Gauge (BWG) standards.​​

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Commonly used grades include 1.4306 (304L) and 1.4404 (316L), suitable for various processing industries. Their characteristic requirements encompass bead worked welds (for enhanced joint strength), fixed lengths (typically 6 meters or customer-specified), and comprehensive testing (including hydrostatic pressure testing ≥1.5 times design pressure, eddy current testing per ASTM E213, and visual inspection per ASTM A450).​

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Packing and Marking

Packed in bundles or ply wooden box wrapped in plastic, and suitably protected for sea-worthily delivery or as requested.