This page covers forged lap joint flanges for piping systems that use a separate stub end and backing flange arrangement. Lap joint flanges are valued for installation flexibility and maintenance convenience, especially where frequent dismantling or corrosion-related material combinations are involved. We can supply this flange type in multiple standards and materials according to customer piping requirements and drawings. Lap joint flanges are often used together with stub ends where the piping system requires easier alignment, repeated dismantling, or flexibility in rotating the backing flange during installation. For this reason, customers usually evaluate not only flange size and standard, but also the matching stub-end arrangement, material combination, and pressure class for the complete joint. Forged manufacture provides a reliable backing flange for industrial piping projects and can be adapted to common international standards or special customer specifications.
| Parameter | Description |
|---|---|
| Key Features | Rotatable design, used with stub ends, ease of disassembly |
| Typical Materials | A105, A182 F304/F316, A350 LF2 |
| Applicable Standards | ASME B16.5, EN 1092-1, DIN, JIS |
| Pressure Class | Class 150 / 300 (ASME), PN6~PN40 (EN) |
| Size Range | 1/2"~24" (DN15~DN600) |
| Facing Type | RF / FF |
| Supply Condition | As-forged / Normalized / Rough machined / Finished |
| Inspection & Docs | EN 10204 3.1 / MTC, dimensional report, traceability marking |

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