ASTM A182 254 SMO Valves


Arrow Piping Solutions is a leading manufacturer and exporter of ASTM A182 254 SMO Valves in India. These valves are crafted using 254 SMO, an austenitic stainless steel grade with outstanding performance in marine environments, cryogenic conditions, and high-temperature applications. Our SMO 254 Valves are engineered to handle extreme conditions and offer exceptional corrosion resistance, mechanical strength, and pressure ratings.


The austenitic microstructure of 254 SMO ensures high impact strength at both room and cryogenic temperatures (as low as -196°C). Our UNS S31254 SMO 254 Cryogenic Globe Valves are ideal for extremely low-temperature use. Additionally, with high nickel content and proper heat treatment, our SMO 254 Ball Valves perform efficiently in high-temperature applications like ballast water systems, heat exchangers, firefighting systems, and cooling systems in marine settings.

SMO 254 Valve Fittings

All valves are manufactured using hot forged bar stock, then heat-treated per ASTM specifications. Every SMO 254 Valve from Arrow Piping Solutions undergoes strict quality control, including leak testing, pressure testing, and compliance with ANSI/ASME/API/MSS standards.

254 SMO Valve Specifications

Grade/Alloy254 SMO
UNS NumberUNS S31254
ForgingA182 F44
CastingA351 CK3MCuN
Size1/2" to 4" (DN25-DN200)
Thread TypesNPT, BSPP, ISO 6149, SAE
Connection TypesWelded, Socket, Clamped, Flanged, Threaded
Pressure ClassPN10 / PN16 / 3000PSI / 6000PSI / 10000PSI
Temperature RangeUp to 371°C (Grafoil), 232°C (PTFE)
OperationManual, Pneumatic, Electric Actuator
Seal MaterialsPTFE, PPL, Graphite
StandardsASME B16.34, B16.5, API 6D, ISO, DIN, 3A, JIS
Manufacturing ProcessForged Bar Stock
PackagingPVC Package, Wooden Case or Custom

Pressure Ratings (ASME B16.34 - A182 F44)

Temperature (°F)Pressure (PSI)
-20 to 100275 to 6000 PSI
200230 to 5000 PSI
400190 to 4140 PSI
600140 to 3640 PSI
80080 to 3360 PSI
100020 to 2675 PSI
120020 to 1285 PSI
150010 to 230 PSI

Types of 254 SMO Valves We Offer

  • SMO 254 Globe Valves
  • Alloy 254 SMO Gate Valves
  • SMO 254 Needle Valves (Compact, Mini, Hexagonal)
  • 254 SMO Ball Valves – 2 Way, 3 Way, 5 Way, Lockable
  • UNS S31254 Butterfly Valves (Triclamp/Threaded)
  • Low Pressure Pneumatic Ball Valves
  • High Pressure Hydraulic Valves (6000 – 10000 PSI)
  • Manifold Valves – OS-LOK Instrumentation Type

Applications of SMO 254 Valves

  • Marine Environments
  • Heat Exchangers
  • Ballast & Cooling Systems
  • Food & Beverage Industry
  • Dairy & Pharmacy Equipment
  • Firefighting Systems
  • Pulp & Paper Industry
  • Chemical Processing
  • Cosmetics & Personal Care
  • Oil & Gas Refineries
  • Water Treatment
  • Instrumentation Panels

Arrow Piping Solutions also stocks compatible valves from trusted brands like Swagelok, Parker, DK LOK, DUOLOK, GYROLOK, and TYLOK. We provide OEM services and customized valve solutions as per project needs from our port in Mumbai, India.