1. Low pressure tube: Seamless tube with pressure under 6.4Mpa, and pipe diameter less than ¦µ250mm;
2. High pressure tube: All seamless tube with pressure higher than 6.4Mpa and diameter more than ¦µ250mm.
Specifications: ¦µ6-530mm*0.5-30mm
Material: 302, 304(L, N, LN), 316(L, LN), 317(L), 321, 347