What payment terms do you accept?

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

What is the difference between NUE and EUE couplings?

EUE couplings have a larger outer diameter and 100% joint efficiency, while NUE couplings are smaller and have lower joint strength.

Where are your products exported to?

Our products are exported to 31 countries and regions including the United States, Russia, and the United Arab Emirates.

2 Nu EU with Coupling

Name: Tubing and Casing Coupling 2-3/8 2-7/8 3-1/2 Nu EU with Coupling
Brand: Tianjin Dongfanglong Petroleum Equipment Manufacture Co., Ltd.
SKU: 2135309662

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

US$3.26

500 Pieces

Sample price:US$4.59/piece.Request sample

Product profile

Warranty

1year

Specification

2-3/8 2-7/8 3-1/2

Trademark

EASTLONG

Origin

Puyang Henan

Production Capacity

5000 PCS One Day

Key features

API 5CT/5B Compliance: All couplings meet API Specifications 5CT/5B for seamless steel tubing and casing connections.

Wide Size Range: Available in sizes 2-3/8" to 4-1/2" including NUE and EUE types.

Multiple Grade Options: Offered in J55, K55, N80, L80, and P110 grades to suit various well conditions.

100% Joint Efficiency: EUE design provides tension and pressure strength greater than the pipe body.

Comprehensive Quality Control: Includes tensile, impact, and sulfide stress cracking tests with PSL-2 or PSL-3 certification.

ISO and API Certified: Company holds ISO9001, ISO14001, ISO45001, HSE, and API 5CT certificates.

Fast Lead Time: Production completed within 15 workdays for both peak and off-peak seasons.

Global Export Capability: Products exported to 31 countries including USA, Russia, and UAE via multiple ports.

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: ≤15hTerms 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.