Completion Operations - Buying tubulars
When buying tubulars, reference should be made on purchase orders to relevant international standards, such as API Specification 5CT and API Standard 5B on specifications for casing, tubing and threads.
In the case of tubulars for example:
1.API SPEC 5CT, "Specification for casing and tubing". Covers seamless and welded casing and tubing, couplings, pup joints and connectors in all grades. Processes of manufacture, chemical and mechanical property requirements, methods of test and dimensions are included.
2.API STD 5B, "Specification for threading, gauging, and thread inspection for casing . . .