Sealing Materials (Sealing Cord) For Met [Sealing Materials (Sealing Cord) For Metallic Threaded Joints In Contact With 1St,2Nd And 3Rd Family Gases And Hot Water Non- Hardening Jointing Compounds Conforming To Bs Specification En751-2- 1997 Class Arp Compound With Dvgw/Csa/Nsf/Ansi-61/ As-Nzs-4020 Approval,]