March 21, 2018ASTM A 312 stainless steel Perforated Well Casing PipeASTM A 312 Perforated Well Casing Pipe 1. Our perforated pipe use J55/K55/N80 casing and tubings of API standard and stainless steel casing pipe, with High overall strength, not so easy to deform. 2. The hole is uniform and smooth […]