Thick Wall Steel Pipe

Tianjin BRISK STEEL is one of the manufacturers of thick wall steel pipe in China. Our products are mainly exported to the Middle East, Southeast Asia, Europe, New Zealand, and other regions.If you would like to learn more about our products, feel free to contact us and send your purchase list.

 PRODUCT

Tianjin BRISK STEEL focus on produce and supply hollow section and steel pipe

Square And Rectangular Steel Tube

• Common Size Range
  Small Sizes: 50×50, 80×80, 100×100
  Medium Sizes: 120×120, 150×150, 200×200
  Large Sizes: 300×300, 400×400, 500×500 and above
  Wall Thickness: Primarily 4–30mm
• Commonly used in engineering: wall thicknesses of 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 20mm and above.
• Extra-thick walls: wall thickness ≥ 20mm.

Circle Steel Pipe

• Common Size Range
  Outer Diameter (D): φ10mm–φ1200mm+, Small Diameter (φ10–89mm), Medium Diameter (φ89–219mm), Large Diameter (φ219mm+)
  Wall Thickness (t): 3mm–150mm+, Standard 6–100mm, Extra Thick up to 200mm+
  Length: Standard length 6–12m, Custom length/cut to size available
• Typical Specifications: φ25×5, φ48×10, φ159×25, φ325×40, φ630×80

Welded Thick-Wall Square and Rectangular Tubes 

• Process Flow:
  Steel strip/plate → Leveling → Bending → High-frequency welding/submerged arc welding → Shaping → Straightening → Cutting → Flaw Detection → Surface Treatment

1. Features:
   Complete range of specifications, moderate cost
   Large diameter and thick-walled tubes are easier to achieve
   Welds are present, requiring non-destructive testing

Cold-drawn/Cold-rolled Seamless Square and Rectangular Tubes (High-Precision Thick-Walled)

• Transformation from seamless round tubes into square and rectangular shapes:
• Seamless round tube → Pickling → Cold drawing → Heat treatment → Finishing
• Features:
  Seamless, high precision, uniform wall thickness
  Suitable for machining and high-requirement structural components
  Primarily for small-diameter, thick-walled applications

Seamless Thick-Walled Pipe (Preferred for High Pressure/Critical Structures)

Hot Rolling/Hot Expansion

• Process Flow: Round billet → Heating → Piercing → Hot Rolling/Expansion → Sizing → Straightening → Finishing → Flaw Detection
• Features: Seamless, dense structure, high strength, good pressure resistance; wide wall thickness range (6–150mm+)
• Applications: High-pressure pipelines, boilers, petroleum, nuclear power, military

Cold Drawing/Cold Rolling

• Process Flow: Hot-rolled tube → Pickling → Cold Drawing/Cold Rolling → Heat Treatment → Finishing
• Features: High dimensional accuracy, smooth surface, uniform wall thickness; suitable for small-diameter thick-walled tubes (φ10–89mm)

Welded Thick-Walled Pipes (Large Diameter, Low Cost)

• Pattern Welding: Steel Plate → Rolling → Submerged Arc Welding / High-Frequency Welding → Weld Heat Treatment → Diameter Expansion / Straightening
• Features: Large diameter easily achievable, low cost; welds require rigorous flaw detection
• Applications: Large structures, municipal pipelines, storage tanks, bridge columns

 

• The biggest difference between thick-walled steel pipes and thin-walled steel pipes is the thickness of the steel pipe wall. Generally speaking, thin-walled steel pipes are cold-drawn technology, while thick-walled steel pipes and thick-walled steel pipes generally use hot-rolling technology, if they are distinguished by units of measure.

 

• Then, it is generally believed that the wall thickness/pipe diameter equal to 0.02 is the watershed between thick-walled steel pipes and thin-walled steel pipes, those with wall thickness/pipe diameter less than 0.02 are thin-walled steel pipes, and those larger than 0.02 are thick-walled steel pipes.

 

• In terms of use, thin-walled steel pipes Wall steel pipes are mostly used on pipes. Thick-walled steel pipes are mostly used in blanks for hollow parts. Use on pressure-bearing and important pipelines.