1.Size:1.9"~20"
2.Material:J55,K55,N80-1,N80-Q,P110 etc.
3.Thread:NU,EU,STC,LTC,BTC,VAM TOP and other special thread type.
4.Standard:API 5L,API 5CT ,ISO 9001:2008
5. Surface treatment: Whole phosphating, or inside phosphating and outside coating
Size as below :
NUE:1.9",2-3/8",2-7/8",3-1/2",4",4-1/2"
EUE:1.9",2-3/8",2-7/8",3-1/2",4",4-1/2"
STC:4-1/2",5",5-1/2",6-5/8",7",7-5/8",8-5/8",9-5/8",10-3/4",11-3/4",13-3/8",16",18-5/8",20".
LTC:4-1/2",5",5-1/2",6-5/8",7",7-5/8",8-5/8",9-5/8",20"
BTC:4-1/2",5",5-1/2",6-5/8",7",7-5/8",8-5/8",9-5/8",10-3/4",11-3/4",13-3/8",16",18-5/8",20".
