API 5CT K55 seamless casing pipes with couplings

Factory-Direct API 5CT K55 Seamless Casing Pipe — 9-5/8 in, PSL1, BTC, R3

API 5CT PSL1 K55 seamless casing pipe in 9-5/8 in (244.5 mm) OD, with BTC threads, R3 lengths of approximately 11.5 m, paint and couplings. Published nominal weights include coupling equivalent. MOQ is 28 metric tonnes, FOB any Chinese port.

Last reviewed: 6 November 2026.

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API 5CT PSL1 K55 9-5/8 in / 244.5 mm BTC R3 / approx. 11.5 m Painted with couplings

Key product facts

32.3 and 36.0 lb/ft included MOQ 28 metric tonnes MTC per production batch Algeria and Iraq support Send size and tonnage

PRODUCT IDENTITY

API 5CT PSL1 K55 seamless casing for oil and gas wells

This page covers 9-5/8 in OD K55 seamless casing for surface, intermediate and production casing programmes. The pipe is supplied with BTC threads, couplings, paint and R3 lengths of approximately 11.5 m. Final grade, dimensions, thread, length, inspection and document scope are confirmed against the purchase order and signed contract.

Surface casingIntermediate casingProduction casingWorkoverOCTG stock

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API 5CT casing pipes handled with protected ends — Seamless casing handled with protected ends before loading.

Specifications

9-5/8 in K55 casing sizes

Nominal weight includes coupling equivalent. Confirm final order weight against the manufacturer's weight table for the corresponding contract.

Standard	Grade / PSL	Outside diameter	Wall thickness	Nominal weight	Thread	Length	Finish
API 5CT	K55 / PSL1	9-5/8 in (244.5 mm)	7.92 mm	32.3 lb/ft approx. 48.1 kg/m	BTC	R3, approx. 11.5 m	Painted, with couplings
API 5CT	K55 / PSL1	9-5/8 in (244.5 mm)	8.94 mm	36.0 lb/ft approx. 53.6 kg/m	BTC	R3, approx. 11.5 m	Painted, with couplings

Weight basis: nominal weight includes coupling equivalent. It is not the plain-end theoretical weight of the pipe body. The manufacturer's contract-specific weight table governs final loading and shipping calculations.

Commercial terms

Reference terms, subject to the signed contract

Delivery	FOB any Chinese port; named loading port confirmed in the signed contract
Reference price	USD 690–780 per metric tonne FOB any Chinese port, subject to size, wall thickness, quantity, coating and inspection requirements. Reference only; the signed contract governs.
Payment	30% T/T deposit; 70% before factory release
MOQ	28 metric tonnes
Lead time	20–30 working days after receipt of deposit, subject to rolling production scheduling
Included documents	Manufacturer-issued EN 10204 3.1 mill test certificate per production batch against the corresponding contract; packing list, commercial invoice, bill of lading and certificate of origin
Quoted separately	Hydrostatic test reports, NDT reports and special coating reports

Inspection and documents

Contract-linked traceability

The manufacturer issues the EN 10204 3.1 mill test certificate for each production batch against the corresponding contract. Hydrostatic and NDT reports and special coating reports are quoted separately.

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Mill certificate

EN 10204 3.1 certificate issued by the manufacturer for the production batch and corresponding contract.

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Inspection

Hydrostatic and NDT requirements are confirmed according to the purchase order; reports are quoted separately.

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Traceability

Size, wall, grade, heat number and bundle marking are checked against the supply documents.

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Third-party inspection

SGS, BV, Intertek, TUV or the buyer's nominated inspector can be coordinated before release.

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Export documents

Packing list, commercial invoice, bill of lading and certificate of origin are included.

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Loading records

Bundle count, markings and loading photographs are recorded before departure.

Quote-ready checklist

Send the information needed for a comparable quotation

Commercial	Technical	Inspection
Quantity in metric tonnes	API 5CT / PSL1 / K55	EN 10204 3.1 MTC
Destination and FOB loading port	9-5/8 in OD, wall and lb/ft	Hydrostatic test report
Required shipment date	BTC, R3, paint and couplings	NDT or special coating report
Contract or tender requirements	Coupling and thread protectors	Third-party inspector

Market support

Algeria and Iraq procurement support

Support is available for OCTG importers, distributors, drilling contractors and project buyers. Ports, inspection scope and document requirements are confirmed per order.

Algeria

English and French communication, K55 casing specification review, EN 10204 3.1 documentation and third-party inspection coordination. Delivery is quoted FOB any Chinese port.

Iraq

Support for 9-5/8 in K55 casing enquiries, BTC and R3 confirmation, batch documentation and loading records. Delivery is quoted FOB any Chinese port.

FAQ

API 5CT K55 casing questions

What is API 5CT PSL1 K55 seamless casing pipe?

It is seamless casing for oil and gas well construction, manufactured to API 5CT at product specification level PSL1 in steel grade K55.

Does the published weight include the coupling?

Yes. The nominal weights of 32.3 lb/ft for 7.92 mm wall and 36.0 lb/ft for 8.94 mm wall include the coupling equivalent. Final order weights are confirmed against the manufacturer's weight table for the corresponding contract.

What does BTC and R3 mean?

BTC means buttress casing thread, threaded and coupled. R3 is API length Range 3, approximately 11.5 m; the final length requirement is confirmed in the contract.

Is this PSL1 or PSL2?

This page covers API 5CT PSL1 K55 casing. Other product specification levels and grades can be reviewed against a separate enquiry.

What documents are supplied?

The manufacturer provides an EN 10204 3.1 mill test certificate for each production batch against the corresponding contract. Packing list, commercial invoice, bill of lading and certificate of origin are included. Hydrostatic and NDT reports and special coating reports are quoted separately.

What are the MOQ, payment and lead time?

The MOQ is 28 metric tonnes. Payment is 30% T/T deposit and 70% before factory release. Lead time is 20–30 working days after receipt of the deposit, subject to rolling production scheduling.

What is the delivery term?

FOB any Chinese port. The named loading port and all commercial terms are confirmed in the signed sales contract.

Request a quotation

Send casing size, weight and tonnage

Send the wall thickness, lb/ft or kg/m basis, quantity, destination, inspection requirements and required documents.

Sales e-mail	info@yuxindapipe.com
WhatsApp / Phone	+86 188 9221 5978
LinkedIn	Jiangyu Xue on LinkedIn
Delivery	FOB any Chinese port; named port confirmed in the contract
Working hours	Monday–Saturday, 08:30–20:00 (GMT+8)