What payment methods do you accept?

We accept various payment terms including LC, T/T, PayPal, and Western Union.

What surface treatment is applied to the couplings?

The couplings undergo spray-paint surface treatment to enhance durability and corrosion resistance.

API 5CT Tubing and Casing Coupling

Name: API 5CT Tubing and Casing Coupling
Brand: Tianjin Dongfanglong Petroleum Equipment Manufacture Co., Ltd.
SKU: 2044939762

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

US$3.68-3.88

100 Pieces

Product profile

After-sales Service

1 Year

Warranty

1 Year

Certification

ISO 9001:2000, API 5CT

Model NO.

4 1/2 EUE J55

Surface Treatment

Spray-Paint

Centralizer Type

Semi-Rigid

Structure

Roller

Material

Cast Steel

Type

Casing Head

Steel Grade

J55, K55,C75, L80, N80, C95, P110,

Transport Package

Wood Pallet

Specification

1.66"-20"

Trademark

Eastlong

Origin

China

HS Code

730429

Production Capacity

1000000PCS/Year

Key features

Comprehensive Steel Grade Options: Available in J55, K55, C75, L80, N80, C95, and P110 grades to match pipe body requirements.

API 5CT & ISO 9001 Certification: Certified to meet API 5CT standards and ISO 9001:2000 quality management systems.

Robust 1-Year Warranty: Includes a full 1-year warranty coverage for mechanical defects and performance issues.

Specialized Tubing Coupling Types: Offers EUE (upset) and NUE (non-upset) types to prevent fatigue fracture in drilling.

Versatile Casing Coupling Designs: Includes LTC, STC, and BTC types for various casing pipe dimensions and connection needs.

Durable Cast Steel Construction: Manufactured from high-grade cast steel with spray-paint surface treatment for longevity.

Rapid Production Lead Time: Average lead time within 15 working days for both peak and off-peak seasons.

Flexible Payment Terms: Accepts LC, T/T, PayPal, and Western Union to accommodate diverse international buyers.

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: >24hTerms 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.