Product Overview
Socket-weld flanges (referred to as SW flanges) are forged high-pressure pipe fittings specifically designed for small-diameter piping systems. The flange features an internal recessed socket; after the pipe is inserted, it is welded in place at the flange neck. These products offer convenient installation, excellent alignment, superior fatigue resistance, and reliable leak‑tight sealing, making them ideally suited for high‑pressure, high‑temperature, and low‑vibration service conditions.
Core Specifications
| Project | Details |
| Manufacturing process | Forging + CNC Precision Machining |
| Size range | 1/2" – 4" / DN15 – DN100 |
| Pressure rating | 150#, 300#, 600#, 900#, 1500#, 2500# |
| Material | Carbon Steel: ASTM A105N Stainless steel: A182 F304/L, F316/L Alloy steels: A350 LF2, A694 series NACE‑grade corrosion‑resistant materials are available. |
| Implementation Standard | ASME B16.5, GB/T 9112-9124, EN 1092, HG/T 20592, SH/T 3406 |
| Sealing surface | RF, FF, and RTJ are all optional. |
Surface Treatment and Quality Control
Surface treatment: Anti-corrosion spray painting, hot-dip galvanizing, electroplating, and custom rust‑preventive coatings.
The comprehensive quality inspection includes chemical composition analysis of the material, mechanical property testing, ultrasonic, penetrant, and magnetic particle nondestructive testing, hydrostatic pressure testing, and metallographic examination. All products undergo rigorous inspection prior to leaving the factory.
Application scenarios
It is widely used in the petrochemical, natural gas, power generation, shipbuilding, pharmaceutical, metallurgical, and urban pipeline industries, and is suitable for small-diameter, high-pressure critical piping systems.
Customized Services
We can provide non-standard dimensions, special pressure ratings, custom materials, product marking, and exclusive packaging solutions; we also support third-party testing to meet the specific requirements of various projects.
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Socket-weld flange
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Hengtong Pipe Fittings Group
Hebei Hengtong Pipe Fitting Group manufactures steel fittings with integrated R&D, production, sales and services. With independent IP rights, we focus on two core product lines: concrete pump components and premium industrial pipe fittings.
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Phone:+86-13283241111
Email: rae@htpipefittings.com
howard@htpipefittings.com
Address: Zhenggang Industrial Park, Yanshan County, Cangzhou City, Hebei Province, China
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