Standard
ASME B16.5, ASME B16.47
Size Range
½" – 60" NPS (type-dependent); Class 150 – Class 2500
Category
Fittings
Pipe flanges in carbon, stainless, and alloy steel manufactured to ASME B16.5 and ASME B16.47, covering NPS ½" through 60" across pressure Classes 150 through 2500. ZC supplies 14 flange types — from weld neck and blind flanges for high-pressure applications to slip-on, socket welding, and threaded flanges for lower-pressure systems — in raised face (RF), ring-type joint (RTJ), and flat face (FF) connection face configurations.
Applications
- → Pipe-to-pipe and pipe-to-equipment connections — bolted joints for assembly and disassembly access
- → Pressure vessel nozzle connections — long welding neck and nozzle flanges on reactors and separators
- → Process plant maintenance isolation — blind flanges on inspection nozzles for routine opening
- → Pipeline positive isolation — spectacle blind and spade flanges where valve leakage is unacceptable
- → Orifice metering stations — orifice flanges for liquid and gas flow measurement per ASME B16.36
- → Offshore and subsea manifold connections — high-pressure RTJ flanges Class 900–2500
- → Pump and compressor tie-in points — flanged joints for equipment pull-out clearance
- → High-purity and corrosion-resistant systems — A182 F304/F316 for chemical and pharmaceutical service
Standards & Certifications
- ASME B16.5 — Pipe flanges and flanged fittings NPS ½ – 24 — primary dimensional standard
- ASME B16.47 — Large diameter pipe flanges NPS 26 – 60 (Series A and Series B)
- MSS SP-44 — Steel pipeline flanges — Class 150–2500 for high-pressure service
- ASME B16.36 — Orifice flanges — radial tapped holes for meter connections
- ASTM A105 — Carbon steel forgings for ambient- and higher-temperature service
- ASTM A350 — Low-alloy steel forgings for notch-toughness service — LF2 for sub-zero temperature
- ASTM A694 — Carbon and alloy steel forgings for high-yield pipeline flanges — F52–F70
- ASTM A182 — Stainless and alloy steel flanges for high-temperature service — F304, F316, F11, F22
- EN 10204 3.1 — Mill test certificate for material and inspection traceability
Materials
| Material Category | ASTM / ASME Grades |
|---|---|
| Carbon steel | ASTM A105/N, ASTM A350 LF2 CL1, ASTM A694 F52/F60/F65/F70 |
| Stainless steel | ASTM A182 F304/F304L/F310/F316/F316L/F317/F321 |
| Alloy steel | ASTM A182 F11/F12/F22 |
Supply Enquiry — Pipe Flange
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