Lightest, most economical connection. Uniform barrel with nut relief.
Photo TODO: Intermediate Barrel studio shot
I-1 / I-2 / I-3PV connections
Intermediate Barrel
Three steps of added reinforcement between HB and E.
I-1, I-2, I-3 are trademarks of FCI
Pressure vessel connections
Pressure vessel connections specifications
- Family:
- LWN · HB · I-1 · I-2 · I-3 · E · SB (Q = insert lip)
- Sizes:
- NPS ½–24 (Class 150–1500); NPS ½–12 (Class 2500)
- Large-diameter:
- ASME B16.47 Series A & B, NPS 26–60, Class 75–900
- Also:
- Studding outlets · butt-weld stub ends · blind flanges
- Codes:
- ASME VIII Div 1, B16.5 (standard); VIII Div 2, I, III, B31.1, B31.7 (on request)
- Standard grade:
- SA-105
- Other grades:
- SA-182 F11/F22/F91/F304/F316/F51…, SA-350 LF2/LF3, SA-266, SA-541, SA-765, A694, B564
- Special chemistry:
- HF alkylation (HF-N), API 934-A/C/E Cr-Mo, low J/X factor
- Heat treat:
- Normalized above Class 300
- Facing:
- RF (std), FF, RTJ
- Lengths:
- 9 / 12 / 16 in standard; any length on request
Same family
More connections
Thicker barrel and automatic nut stop. Sch 80 bore through 12 in.
Barrel OD equals flange OD. Most reinforcement of the standard family.
Barrel OD exceeds flange OD. You specify the OD.
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Tell us the material, size, class, quantity and need-by date. We quote forgings rough, proof machined or finished.