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Forged Flange
Flanges provide bolted connections between piping, equipment and valves.
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- Welding Neck (WN) — high pressure & severe service
- Slip-On (SO) — easy alignment, moderate pressure
- Blind (BL) — closes pipe ends
- Threaded (TH) — no welding, low-pressure systems
- Lap Joint (LJ) — with stub end, for corrosive / non-ferrous lines
- Socket Welding (SW) — small-bore high-pressure lines
Typical Order Examples
ASME B16.5 Flange 6" Class 300 WN RF SCH 40 A105
EN 1092-1 Type 11 (WN) DN150 PN40 16Mo3
Standards & Equivalence
ASME B16.5 (≤24") / B16.47 (>24", Series A/B) ↔ EN 1092-1 ↔ JIS B2220 ↔ GB/T 9112–9124 / HG/T 20592–20615
Size Range
| Common | 1/2" – 24" (ASME B16.5); 26" – 60" (ASME B16.47) |
|---|---|
| Minimum | 1/2" (DN15); instrument threaded flanges down to 1/4" (DN8) |
| Maximum | Standard up to 60" (DN1500); custom wind-power / hydro flanges to 200" (DN5000)+ |
Certifications & Audit Standards
- ASTM A105 / A182 with residual-element limits, normalizing / solution treatment
- MSS SP-25 marking — heat number, rating & grade stamped, 100% traceability
- CRN (Canadian Registration Number) — wall & stress design audit
- PED 2014/68/EU + PED 4.3 · AD 2000-Merkblatt W0
- Marine class: ABS · DNV · LR · BV · CCS
Weight Calculation Formulas
Theoretical weights at carbon steel density 7.85 kg/dm³ — multiply by 1.01 for SS304, 1.02 for SS316L.
| Formula (kg) | |
|---|---|
| Variables |