High pressure and low temperature pipe fittings

High Pressure and Low Temperature Pipe Fittings

Product Overview:
High pressure and low temperature pipe fittings are precision-engineered components used to connect, control, or redirect piping systems operating under high internal pressure and extremely low temperatures. These fittings are essential in critical systems such as cryogenic pipelines, LNG processing, petrochemical plants, and power generation applications. Manufactured from impact-resistant alloys, they offer outstanding toughness, strength, and sealing performance in challenging environments.

Key Standards:

• ASME/ANSI: B16.9, B16.11, B16.5

• MSS SP: SP-75, SP-83

• Material Standards: ASTM A420 (WPL6, WPL3), ASTM A350 (LF2, LF3), ASTM A234 (WPB, WP11, WP91), etc.

• Testing Standards: ASTM A370, ASTM E23, ASTM A105, EN10204

Common Materials:

• Carbon steel (low-temp grades): ASTM A420 WPL6 / WPL3

• Alloy steel (high-pressure grades): ASTM A234 WP11 / WP22 / WP91

• Stainless steel: ASTM A403 WP304 / WP316

• Duplex & Nickel alloys: For severe service applications

Available Types:

• Butt Weld Fittings: Elbows, Tees, Reducers, Caps

• Forged Fittings: Socket weld & threaded (90° elbows, tees, couplings, unions)

• Flanges: Weld neck, blind, slip-on, socket weld

• Special fittings: Y-fittings, swages, olets

Size Range:

• NPS: 1/2" to 48" (larger sizes available on request)

• Pressure Ratings: 150# to 2500# (Class or SCH10 to XXS)

• Temperature Range: -196°C to +650°C (depending on material)

Key Features:

• Excellent impact resistance at cryogenic temperatures

• High strength and pressure resistance

• Smooth interior for optimal flow and reduced pressure drop

• Precision machining for leak-free connections

• Heat treated and tested for reliability under extreme service

Applications:

• LNG and cryogenic gas plants

• Low-temperature service pipelines

• Offshore platforms and subsea applications

• Refineries and chemical processing

• Nuclear and thermal power stations

Quality Control & Certification:

• 90% dimensional inspection

• Charpy impact testing at -46°C or -101°C as required

• NDT: UT/RT/MT/PT

• Heat treatment: Normalizing, quenching, tempering

• Certified to EN10204 3.1/3.2 with third-party inspection (SGS, BV, TUV)