Which ports are used for export?

We ship from Tianjin Port, Qingdao Port, and Shanghai Port.

Is the product certified by API?

Yes, the product holds the API 5CT certificate authorized by the American Petroleum Institute.

What is the size range for the tubing coupling?

The tubing coupling size ranges from 1.9 inches to 4.5 inches.

Steel Pipe Casing Coupling API 5CT 3 1/2 Eue P110 Tubing Connection Tool Coupling

Name: Steel Pipe Casing Coupling API 5CT 3 1/2 Eue P110 Tubing Connection Tool Coupling
Brand: Tianjin Dongfanglong Petroleum Equipment Manufacture Co., Ltd.
SKU: 2054108072

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

US$9.35

50 Pieces

Sample price:US$20.00/piece.Request sample

Product profile

Warranty

1years

Certification

API 5CT

Name

Steel Pipe Casing Coupling API 5CT 3 1/2 Eue P110

Model NO.

3-12

Thread

Nu EU

Grade

K55 J55 L80 N80 P110

Transport Package

Wooden Pallet

Specification

3-1/2

Trademark

EASTLONG

Origin

Puyang China

HS Code

7307990000

Production Capacity

5000 PCS One Day

Key features

API 5CT Certified Quality: Authorized API 5CT certificate ensures compliance with American Petroleum Institute standards.

Wide Grade Selection: Available in J55, K55, L80, N80, and P110 grades to meet diverse engineering requirements.

Multiple Thread Types: Supports NUE, EUE, LTC, STC, and BTC thread types for versatile connection options.

Comprehensive Size Range: Tubing couplings from 1.9''-4.5'' and casing couplings from 4.5''-20'' available.

Established Manufacturer: Founded in 1999 with 35 senior engineers and ISO9001 certification for reliable production.

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

Flexible Payment Terms: Accepts LC, T/T, PayPal, and Western Union for convenient transaction methods.

Global Export Experience: Exports to North America, Europe, Asia, and Africa with multiple port options.

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.