Standards guide
OCTG Thread Connections: STC, LTC, BTC
Ordering notes for casing and tubing connection types.
Practical Standard Review
OCTG connection selection affects coupling, thread protector, drift, make up, and field compatibility. Buyers should confirm thread type, coupling type, range, length, grade, and inspection scope.
Himount Steel reviews the ordered standard, grade, product form, dimension tolerance, inspection level, packing method, and shipment route before confirming price and lead time. Final supply always follows the buyer specification and accepted mill test certificate.
Key Ordering Points
| Main comparison | OCTG connection selection affects coupling, thread protector, drift, make up, and field compatibility. Buyers should confirm thread type, coupling type, range, length, grade, and inspection scope. |
|---|---|
| Confirm in RFQ | STC, LTC, BTC or premium connection, coupling, size, weight, range, drift, and protector |
| Risk to avoid | Do not quote casing only by grade and OD; connection controls the final supply. |
| Documentation | Confirm MTC type, heat number traceability, inspection record, and any buyer approval wording. |
| Next step | Send the project specification or previous PO so Himount Steel can check the supply route. |
Buyer Checks Before Quotation
- Use the project specification as the authority when grade names look similar.
- Confirm product form, size, tolerance, delivery condition, and inspection plan together.
- Ask for comparable references only as RFQ aids, not automatic substitutions.
- Review certificate wording before shipment if the project has strict acceptance rules.
Related Himount Pages
Prepare A Complete Steel Inquiry
Send the product standard, grade, size list, quantity, drawings, inspection scope, certificate request, packing method, and destination port. Himount Steel will review the technical route before quotation.