ASTM A333 Gr 6 Low Temperature Carbon Steel Pipe for LNG Projects

ASTM A333 Gr 6 Low Temperature Carbon Steel Pipe is a seamless steel pipe engineers specifically design for low-temperature service applications. This ASTM A333 Gr 6 Low Temperature Carbon Steel Pipe undergoes rigorous Charpy V-notch impact testing at -46°C to ensure reliable performance in cold environments .

Product Parameters

Outer diameter range: 1/2 inch to 36 inches (21.3mm to 914.4mm).

Regular sizes include 1/2 inch, 1 inch, 2 inches, 4 inches, 6 inches, 8 inches, 10 inches, 12 inches, and larger diameters.

Wall thickness options follow Schedule 10 through Schedule 160, STD, XS, and XXS classifications .

Standard lengths come in 6 meters, 12 meters, or we can customize according to project requirements .

The processing technique involves seamless manufacturing with hot finishing or cold drawing methods.

The pipe meets ASTM A333 / ASME SA333 Grade 6 execution standards. Packaging includes steel strip bundles with waterproof wrapping, wooden protection, and plastic caps on both ends . We offer various surface treatments including black bare finish, oiled coating, varnish painting, shot blasting, or phosphating .

Chemical Composition (Typical %)

Carbon (C): 0.30 maximum
Manganese (Mn): 0.29 to 1.06
Phosphorus (P): 0.025 maximum
Sulfur (S): 0.025 maximum
Silicon (Si): 0.10 minimum

Physical Properties

Tensile Strength: 415 MPa (60,000 psi) minimum
Yield Strength: 240 MPa (35,000 psi) minimum
Elongation: 30 percent minimum in longitudinal direction
Impact Test: Minimum 18 J average at -46°C (-50°F)
Heat Treatment: Normalizing or quenching and tempering to control microstructure

Product Applications

This ASTM A333 Gr 6 pipe serves in LPG and propane storage facilities where operating temperatures reach -42°C. Petrochemical plants use it for ethylene and ammonia processing equipment . Cold-climate pipeline stations and arctic region projects rely on this material for reliable performance . Many mills also offer this product with dual certification to ASTM A106 Gr B Seamless Carbon Steel Pipe, giving buyers additional flexibility for projects requiring both specifications. Depressurization systems and gas expansion applications benefit from its excellent low-temperature toughness. Refrigeration plants and cryogenic storage facilities incorporate this pipe for handling liquefied gases.