Classification Of Stainless Steel Pipes

I. Classification by Production Process

Seamless Stainless Steel PipeFormed by hot rolling/cold drawing, no weld seam, high pressure and temperature resistance, strong pressure-bearing capacity. Applied in chemical industry, high-pressure pipelines, boilers and fluid transportation.

Welded Stainless Steel PipeFormed by bending and welding steel coils, with straight seam or spiral seam, cost-effective. Widely used in decoration, water supply and drainage, structural pipelines and large-diameter projects.

 

 

II. Classification by Material Grade

201: Economical type, special for decoration, indoor guardrails and furniture pipes.

304 / 304L: General austenitic stainless steel, good corrosion resistance, applied in civil use, chemical industry, water supply and drainage, and decoration.

316 / 316L: Acid and alkali resistant, seawater resistant, stronger corrosion resistance, applied in coastal areas, chemical industry, medical industry and food equipment.

321: High temperature resistant, intergranular corrosion resistant, applied in boilers, high-temperature pipelines and thermal equipment.

309S / 310S: Ultra-high temperature resistant, applied in furnace tubes, heat treatment equipment and high-temperature flues.

2205 Duplex Steel: High strength, strong corrosion resistance, applied in chemical industry, seawater and pressure vessels.

III. Classification by Shape

Round pipe

Square tube

Rectangular tube

Oval / Special shape pipe

 

IV. Classification by Surface Treatment

2B Industrial Finish

BA Bright Finish

No.4 Brushed Finish

8K Mirror Finish

Frosted, Colored, Wood Grain, Sandblasted

 

V. Classification by Wall Thickness

Thin-walled pipe: Decoration, guardrails, furniture

Thick-walled pipe: Machining, pressure-bearing, bushings, engineering structures

 

VI. Classification by Application Industry

Decorative Use: Guardrails, handrails, doors and windows, curtain walls, shelves

Industrial Fluid Use: Water supply and drainage, oil and gas, chemical industry, medical industry, food pipelines

Boiler/Heat Exchanger Use: High temperature and pressure resistant heat exchange tubes

Mechanical Structure Use: Equipment frames, spare parts, shaft processing

Large-diameter Engineering Use: Municipal pipelines, environmental protection, power plant ASTM A409 engineering pipes

 

VII. Classification by Execution Standard

GB (National Standard), ASTM A240/A312/A409 (American Standard), JIS (Japanese Standard), DIN (German Standard)