Weld Neck Flange
Forged flanges to ASME B16.5 and EN 1092-1, marked and traceable to the heat number.
Key facts
| Grades and materials we supply | A105, A350 LF2, A182 F304 / F316 / F316L / F321, A694 F52 / F60 |
|---|---|
| Size range | NPS 1/2" – 24" (DN15 – DN600); larger sizes to ASME B16.47 |
| Pressure class | Class 150 / 300 / 600 / 900 / 1500 / 2500 · PN10 – PN40 |
| Facing | RF, RTJ or FF, machined with concentric or spiral serration |
| Standard | ASME B16.5, ASME B16.47, EN 1092-1, JIS B2220, GB/T 9115 |
Grades we hold specifications for
Technical specifications
A weld neck flange is chosen when the joint has to survive pressure, vibration or thermal cycling — the taper hub moves the stress away from the weld. We supply forged and machined flanges in carbon steel, low-temperature steel and stainless, with facing, drilling and marking to the standard you specify.
Main applications
- Oil, gas and petrochemical piping
- Refinery and chemical plant
- Power generation
- Water and utility pipelines
- Shipbuilding and offshore
Packing and delivery
Wooden cases or pallets, each flange marked with size, class, material and heat number, with the mill test certificate and dimensional report in the document pack.
Standards
FAQ
Can the flanges be supplied with third-party inspection?
Yes — SGS, BV or Intertek inspection before loading, including dimensional and hardness checks. Tell us the scope and we will quote the inspection cost separately.
Do you supply flanges in duplex or special materials?
A182 F51 / F53 and other special grades are available against a firm enquiry with the quantity, since these are made to order rather than held in stock.
