What is the lead time for orders?

The average lead time is within 15 workdays, applicable to both peak and off-season periods.

What payment terms are accepted?

We accept LC, T/T, PayPal, and Western Union for payments.

What surface treatments are applied?

Surface treatment includes whole phosphating, or inside phosphating combined with outside coating.

API 5CT Couplings for Threaded Tubing and Casing Pipes in Oilfield

Name: API 5CT Couplings for Threaded Tubing and Casing Pipes in Oilfield
Brand: Tianjin Dongfanglong Petroleum Equipment Manufacture Co., Ltd.
SKU: 2047265842

Tianjin, ChinaTianjin Dongfanglong Petroleum Equipment Manufacture Co., Ltd.

US$2.69

500 Pieces

Sample price:US$20.00/piece.Request sample

Product profile

Warranty

1years

Name

API 5CT Couplings for Threaded Tubing and Casing P

Thread

Nu EU

Model NO.

2-3/8-20

Grade

K55 J55 L80 N80 P110

Usage

Oil Pipe

Trademark

EASTLONG

Origin

China Puyang

HS Code

7307990000

Production Capacity

5000 PCS One Day

Key features

API 5CT Certified Quality: Authorized by American Petroleum Institute ensuring top-tier oilfield standards.

Wide Size Range: Casing couplings 4-1/2' to 20'; Tubing couplings 1.9' to 4-1/2'.

Multiple Steel Grades: Available in J55, K55, L80, N80, and P110 to suit various pressure needs.

Various Thread Types: Supports STC, LTC, BTC for casing and EUE, NUE for tubing connections.

Corrosion Protection: Features whole phosphating or inside phosphating with outside coating.

Established Manufacturer: Founded in 1999 with ISO9001 and BV supplier evaluations.

Fast Delivery: Average lead time within 15 workdays for both peak and off-season.

Global Export Experience: Exports to North America, Europe, Asia, Africa, and Oceania.

Company profile

Tianjin Dongfanglong Petroleum Equipment Manufacture Co., Ltd.Tianjin, China

Business Type: Manufacturer/FactoryExport Year: 2019-06-07Nearest Port: TIANJIN PORT, QINGDAO PORT, SHANGHAI PORTAverage Response Time: ≤18hTerms of Payment: LC, T/T, PayPal, etc.International Commercial Terms(Incoterms): FOB, EXW, CIF, DDP

AI-Powered supplier vetting

SummaryTianjin Dongfanglong Petroleum Equipment Manufacture Co., Ltd. is a China-based manufacturer founded in 1999, focused on oil pipes, pipe fittings, drilling and production tools, and petroleum automation equipment. The supplier reports ISO 9001 and ISO 14001 certification, 10 production lines, 11–20 years of R&D engineer experience, and 11–20 quality-control staff. It states that its capabilities cover design, development, manufacturing, testing, experimentation, and full-cycle service, supported by more than 30 independent intellectual property rights and an intelligent workshop. The company exports to broad global markets and reports export activity since 2019, but the provided information does not identify specific customer cases or independently verify the stated capabilities.

Supplier typeThe supplier is explicitly identified as a Manufacturer/Factory and a limited company based in Tianjin, China. Its stated business focuses on petroleum equipment, oil pipes, pipe fittings, drilling and production tools, and automation equipment, matching the listed industrial product categories.

CertificationsThe supplier reports holding ISO 14001 and ISO 9001 management-system certifications. These are explicit certification records in the provided data, although certificate scope and validity dates are not given.

R&D capabilityThe supplier reports more than 30 independent intellectual property rights, an intelligent workshop, numerical-control automation equipment capabilities, an e-commerce platform, and recognition as a national science and technology-based small and medium-sized enterprise. These statements provide explicit evidence of innovation-related infrastructure and activity.

Production capacityThe supplier describes an integrated chain covering design, development, manufacturing, testing, and experimentation; operates 10 production lines; and has an intelligent workshop. It also reports oil equipment and pipe-related manufacturing experience, with stated order fulfillment within 15 workdays in both off-peak and peak seasons, supporting a positive production-capability assessment.

Customization capabilityThe stated full-cycle integration of design, development, manufacturing, testing, and experimentation, together with numerical-control automation equipment and an intelligent manufacturing model, indicates the ability to develop and manufacture tailored petroleum equipment. However, no specific customized project examples, engineering-change process, or minimum-order requirements are provided.

Product Q&A

Q:What certifications does the product have?

The product holds API 5CT certification authorized by the American Petroleum Institute, ISO9001 Quality system certificates, and BV Quality supplier evaluation.

Q:What steel grades are available?

We offer multiple steel grades including J55, K55, L80, N80, and P110 to meet different operational requirements.

Q:What are the available sizes for couplings?

Casing couplings range from 4-1/2' to 20', and tubing couplings range from 1.9' to 4-1/2'.

Q:What thread types are supported?

We support STC, LTC, and BTC for casing pipes, and EUE and NUE for tubing pipes.

Q:What is the warranty period?

The product comes with a 1-year warranty.