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Cap & Plug
Caps and plugs close pipeline ends.
Request a Quote for This Product Download catalogue (PDF)Series & Variants
- Ellipsoidal Cap — butt-weld, medium/large bore, excellent load behavior
- Hex / Round Head Plug — small-bore forged, threaded or socket-weld
Typical Order Examples
ASME B16.9 Cap 14" SCH XS ASTM A234 WPB
ASME B16.11 Hex Head Plug 1" 3000LB NPT ASTM A105
Standards & Equivalence
Butt-weld: ASME B16.9 ↔ GB/T 12459. Forged threaded / SW: ASME B16.11 ↔ GB/T 14383
Size Range
| Common | Caps 1/2" – 48"; plugs 1/8" – 4" |
|---|---|
| Minimum | 1/8" (DN6) threaded plug; 1/2" (DN15) butt-weld cap |
| Maximum | Caps pressed up to 102" (DN2600) |
Certifications & Audit Standards
- Butt-weld caps: PED 2014/68/EU + PED 4.3 · AD 2000 W0 · NACE MR0175
- Forged plugs: ASTM A105 with residual-element limits & normalizing
- MSS SP-25 marking — full heat-number traceability
- 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 |