1. Steel pipes SMLS/ERW/SAW
Material Specification
API 5L Grade B
ASTM A53 Grade B
ASTM A106 Grade B
ASTM A333 Grade 6(low temperature)
ASTM A335 P5/P11/P22(high temperature)
Wall Thickness SCH. 40-SCH. 160

2. Galvanized steel pipes:
Material Specification
TIS 276/277-2532 Type2/Type4
BS 1387 - 1985 BS-L/BS-M/BS-H
3. Stainless steel pipes SMLS/Welded:
Material Specification
ASTM TP304/304L/316/316L
Wall Thickness SCH. 10-SCH. 160
All these products with accurate geometrical dimensions, widely used in various pipelines which convey gas, water, electricity and oil ect. The whole ranges of specifications are available.