This page covers forged weld neck flanges supplied in common international standards and project-specific specifications. Weld neck flanges are preferred where a tapered hub and butt-weld connection help improve stress distribution at the joint. Material grade, facing type, pressure rating, and dimensions can be arranged according to ASME, EN, DIN, JIS, or custom requirements for industrial piping and pressure equipment projects. In actual flange procurement, customers usually confirm not only the nominal type but also the applicable standard system, pressure class, facing type, bore condition, and any required machining or inspection before ordering. This flange family is therefore suitable for projects that need a stronger hub transition and more reliable stress distribution at the welded joint, especially in process piping and pressure equipment service. Depending on the specification, products can be arranged in carbon steel, alloy steel, stainless steel, and other required materials, with standard or drawing-based dimensions for industrial use.
| Parameter | Description |
|---|---|
| Key Features | Tapered hub transition, weld prep readiness, sealing face accuracy |
| Typical Materials | A105, A182 F11/F22/F316, A350 LF2, per drawing |
| Applicable Standards | ASME B16.5 / B16.47, EN 1092-1, DIN, JIS, project custom |
| Pressure Class | Class 150 / 300 / 600 / 900 / 1500 / 2500 (ASME) |
| Size Range | 1/2"~60" (DN15~DN1500) / Large diameter per ASME B16.47 |
| Facing Type | RF / FF / RTJ as specified |
| Supply Condition | As-forged / Normalized / Quenched & tempered / Rough machined / Finished |
| Inspection & Docs | EN 10204 3.1 / MTC, UT/MT/PT per ITP, dimensional report, traceability marking |

Sign up
for Newsletter
Subscribe to the weekly newsletter for all the latest updates