1 high pressure steel pipe 2 OD 28-810mm 3 thickness 5-28mm 4 the lowest price Seamless Steel Pipeseamless steel pipe Is widely used in transportation of oil, natural gas, gas, water and some solid materials, pipes, etc., lighter, is an economic cross-section steel, widely used in the manufacture structural parts and mechanical parts, such as oil drill pipe, automobile drive shaft, bicycle stand, ...