| BS1640 PART 3 | K7766 | BRITISH STANDARDS INSTITUTION |
| BS1640/TEE6X6X4IN/WPB/SCH40 | K6451 | BAE SYSTEMS MARINE LIMITED |
| QCA/BS1640/TEE6X6X4IN/WPB/SCH40 | K2516 | MINISTRY OF DEFENCE NAVY SHIPS SUPPORT AGENCY |
| TABLE7 SCHED40 6X6X4 | K7766 | BRITISH STANDARDS INSTITUTION |