API 602 Forged Steel Valves
API 602 forged steel globe valves provide tight shutoff and flow regulation in small sizes on steam vent, drain, sampling and instrument lines. The forged body is reliable in high-pressure and vibrating service.
Overview
For API 602 globe valves, a bolted bonnet OS&Y design is standard; where zero external leakage is required, a welded bonnet or bellows seal design can be selected. Ends are NPT threaded, socket-weld (ASME B16.11), butt-weld or flanged.
Technical specifications
| Size | ½”–2″ (DN15–DN50) |
|---|---|
| Pressure class | Class 800 and 1500 (API 602); Class 2500 to ASME B16.34; Class 150–1500 for flanged types |
| End connections | NPT, SW, BW, flanged |
| Bonnet | Bolted, welded (API 602); pressure seal to ASME B16.34; bellows seal option |
| Materials | A105N, LF2, F11, F22, F316, F51 |
Key features
- Tight shutoff and regulation in small sizes
- Welded bonnet and bellows seal options
- Forged body for high pressure and vibration
Standards and construction
- Design: API 602 / ISO 15761, ASME B16.34
- End connections: socket weld (ASME B16.11), threaded NPT (ASME B1.20.1), butt weld (ASME B16.25), flanged (ASME B16.5)
- Bonnet types: bolted bonnet (OS&Y), welded bonnet; pressure seal designs to ASME B16.34
- Port: standard (reduced) or full port
- Testing: API 598; on request, packing type-tested for low emissions (ISO 15848-1 / API 624)
Material combinations
| Combination | Body / bonnet | Trim | Typical service |
|---|---|---|---|
| A105 / F6a | A105 | 13Cr (F6a) | General hydrocarbon, water, air, steam |
| A105 / F6a + hardfacing | A105 | 13Cr + CoCr hardfaced seat | Steam, high temperature, abrasive service |
| LF2 / 304 | A350 LF2 | 304 | Low temperature (down to approximately −46 °C) |
| F11 / F6a + hardfacing | A182 F11 | 13Cr + CoCr hardfacing | Superheated steam, high temperature |
| F304 / 304 | A182 F304 | 304 | Corrosive service |
| F316 / 316 | A182 F316 | 316 | Corrosive and chemical service |
| F51 / F51 | A182 F51 (duplex) | F51 | Chloride environments; seawater depending on conditions |
Documentation and testing
On industrial projects the documentation package matters as much as the valve. We confirm the certificate and test scope for every line item at quotation stage:
- EN 10204 3.1 material certificates for pressure-retaining and wetted parts, traceable by heat number
- EN 10204 3.2 with third-party inspection, on request
- Pressure test reports to API 598 or EN 12266-1: shell, seat and, where specified, gas tests
- Fire-test certificates (API 607 / ISO 10497) for fire-safe type-tested designs
- PMI reports for alloy and stainless materials
- Dimensional, visual and coating inspection records
- PED 2014/68/EU CE declaration for equipment within its scope
- NACE MR0175 / ISO 15156 compliance statement for sour (H₂S) service
Technical datasheet
Frequently Asked Questions
Where are forged globe valves used?
At drain and vent points on steam lines, at sampling and instrument connections, and on small-bore chemical injection and bypass lines.
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View detailsRequest a quote: API 602 Forged Steel Globe Valve
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