what is PSL1 and PSL 2 in API ?
在加拿大 1. special testing program for reeling installation 2. sour service severity 1 3 .sour service severity 3 4. special pre-cleaning suitable for internal coating. 5.sweet service 6.what is PSL1 and PSL 2 in API ? 评论 nobody knows? who can t...华人论坛