Loose steel pipe flange with weld-on collat

Loose steel pipe flange with weld-on collat

Loose steel pipe flange with weld-on collat

Loose Steel Pipe Flange with Weld-On Collar is a flexible pipe connection component, featuring a loose flange ring paired with a weld-on collar (hub) that is welded to the pipe, complying with ANSI/ASME, GB, or DIN international standards.

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Description

Core Advantages

  • Weld-on collar ensures strong connection stability, while the loose flange ring allows angular adjustment for easy alignment during installation.
  • Reduces welding stress on the flange itself, enhancing pressure-bearing capacity and durability in medium-pressure systems.
  • Available in carbon steel, stainless steel, alloy steel materials, adapting to diverse media and working conditions with good corrosion resistance.
  • Complies with global standards for high interchangeability, seamlessly matching with international pipelines, valves, and fittings.

Application Scenarios

Widely used in oil & gas, petrochemical, water treatment, municipal engineering, and power generation systems. It reliably connects medium-diameter pipes carrying water, steam, oil products, natural gas, and general industrial fluids, suitable for scenarios requiring easy installation, angular adjustment, or periodic maintenance of pipelines.

Additional information

Size

DN10, DN15, DN20, DN25, DN32, DN40, DN50, DN65, DN80, DN100, DN125, DN150, DN200, DN250, DN300, DN350, DN400, DN450, DN500, DN600

nominal pressure

PN6, PN10, PN16

Material

Carbon Steel: ASTM A105, 20#, Q235, 16Mn, ASTM A350 LF1, LF2 CL1/CL2, LF3 CL1/CL2, ASTM A694 F42, F46, F48, F50, F52, F56, F60, F65, F70;
Stainless Steel: ASTM A182 F304, 304L, F316, 316L, 1Cr18Ni9Ti, 0Cr18Ni9Ti, 321, 18-8;

Production Standards

National Standard (GB): GB/T9112-2000 (GB9113·1-2000 ～ GB9113·4-2000)
Marine Standard: GB/T10747-89
American Standard (ANSI): ANSI B16.5 Class150, 300, 600, 900, 1500 (WN, SO, BL, TH, LJ, SW)
Japanese Standard (JIS): JIS 5K, 10K, 16K, 20K (PL, SO, BL, WN, TH, SW)
German Standard (DIN): DIN2573, 2572, 2631, 2576, 2632, 2633, 2543, 2634, 2545 (PL, SO, WN, BL, TH)
Ministry of Chemical Industry Standard (HG): HG5010-52 ～ HG5028-58, HGJ44-91 ～ HGJ65-91, HG20592-97 Series, HG20615-97 Series
Ministry of Machinery Industry Standard (JB): JB81-94 ～ JB86-94, JB/T79-94 ～ JB/T86-94, JB/T74-1994
Pressure Vessel Standard: JB1157-82 ～ JB1160-82, JB4700-2000 ～ JB4707-2000, B16.47A/B, B16.39, B16.48

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