LTCS (Low Temperature Carbon Steel) is used in piping system when there is a possibility of process fluid temperature falling below -20°F during operation. Low-temperature carbon steels have been chiefly used in low-temperature equipment such as chemical plant below -55 °F and especially for welded pressure vessels.
ASTM A333 / A333M,Standard Specification for Seamless and Welded Steel Pipe for Low-Temperature Service and Other Applications with Required Notch Toughness.It covers seamless and welded steel pipe for use at cold temperature service up to minus 50° F (minus 45° C) .
There are several grades in A333, each with different steelmaking approach to improve the steel’s impact properties at lower temperatures.Grades 1 and Grsde 6 are impact tested at -50°F and Gr6 is a commonly used grades.A333 Gr6 is used for pressure piping of compressed gas, where a crack would be expected to have catastrophic consequences.
Sometimes ASTM A106 Gr B material is replaced by ASTM A333 Gr 6 for LTCS in normal operation. There is no major difference in between these two materials in composition.Also no non-destructive testing is available which can ensure these two materials. So sometimes the material mix up may occur in construction sites.
WORLD-IRON STEEL stock the full range of carbon steel pipe including LTCS pipe according to ASTM A333 we also can provide customers with products based on their specified technical requirements.If we are helpful ,please mail to us : firstname.lastname@example.org