SS316L Perforated Stainless Steel Casing Pipe 1. Our perforated pipe uses ASTM A312 or ASTM A409 standard stainless steel casing pipes, with High overall strength, not so easy to deform. 2. The hole is uniform and smooth without burrs. 3. Perforated casing pipe is easy to operate and convenient to use. 4. The hole size and number can be customer designed. 5. The connection types are also customer designed. API/ISO Casing and tubing material: H40,J55,K55 M65,N80,L80, P110,Q125 etc API/ISO Casing and tubing size: 2 3/8inch - 20inch Connection type of API/ISO tubing: EUE,NUE Connection type of API/ISO casing: STC,LTC,BTC We also can manufacture other special connection types according to clients\' requirement.