API 602 Forged Steel Valve Manufacturer

API 602 forged steel gate, globe, and check valve manufacturer in India. Class 800 to 4500. A105, F304, F316, F11, F22. Threaded, socket weld, butt weld. Export to Middle East & worldwide.

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What is API 602?

API 602 (Compact Steel Gate Valves) covers forged steel gate, globe, and check valves in sizes NPS 4 and smaller. These compact-design valves are used extensively in instrumentation, sampling, and process piping where space is limited.

Valve Types

  • Compact Gate Valve (Rising Stem)
  • Globe Valve (Straight, Angle, Y-Pattern)
  • Piston Check Valve
  • Swing Check Valve
  • Needle Valve

Materials

  • ASTM A105 / A105N (Carbon Steel)
  • ASTM A182 F304/F304L (SS304)
  • ASTM A182 F316/F316L (SS316)
  • ASTM A182 F11 (1.25Cr-0.5Mo)
  • ASTM A182 F22 (2.25Cr-1Mo)
  • ASTM A182 F51 (Duplex 2205)

Pressure Classes

  • Class 800 (PN 130)
  • Class 1500 (PN 250)
  • Class 2500 (PN 420)
  • Class 4500

End Connections

  • Threaded (NPT, BSP)
  • Socket Weld (SW)
  • Butt Weld (BW)
  • Flanged (RF, RTJ)

Frequently Asked Questions

What is the difference between API 602 and API 600 valves?
API 600 covers large cast steel gate valves (NPS 2.5 and above) while API 602 covers compact forged steel valves (NPS 4 and below). API 602 valves are typically lighter, more compact, and available in higher pressure classes (up to Class 4500). They use forged bodies rather than castings for superior metallurgical properties.
What sizes are covered under API 602?
API 602 covers valve sizes from NPS 1/4" (DN8) through NPS 4" (DN100). The most common sizes are 1/2" through 2" in Class 800 for process instrumentation and sampling lines.
What pressure testing standard applies to API 602 valves?
API 602 valves are tested per API 598 or BS EN 12266-1. Shell test pressure is 1.5x the CWP rating, and seat test is 1.1x the CWP rating. Low-pressure air seat test at 0.6 bar is also performed.
Can API 602 valves be used for sour service (H₂S)?
Yes, when manufactured with NACE MR0175/ISO 15156 compliant materials. Common sour service materials include A105N (HRC ≤ 22), F316/F316L, and F51 Duplex. We supply API 602 valves with full NACE compliance documentation.

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