... Drill Pipe We can produced drilling pipe(API5D,APISEPC7,API5CT) of 2-3/8",2-7/8",3-1/2,4",4-1/2",5",5-1/2"oil drilling pipe :-Drilling pipe ... visual inspection1) Certificate: API 5DP-0002,API Q1-0964, ISO 9001,ISO 14001,OHSAS 180012) OD:2 3/8” TO 5 1/2” of label 1 ... protectors on the connections. Drill pipes of our company are produced in accordance to Standards of API 5DP, API7 &7-1, NS-1. RUSSIA ...