What is the warranty period?

The product comes with a 1-year warranty covering mechanical defects.

What is the size range of the couplings?

We carry sizes from 2-3/8 inches up to 20 inches depending on the grade and type.

Where are the products exported to?

Our products are exported to 31 countries and regions including North America, Russia, and the Middle East.

API 5CT Tubing and Casing Coupling for Oil Pipe 2-3/8 2-7/8 3-1/2

Name: API 5CT Tubing and Casing Coupling for Oil Pipe 2-3/8 2-7/8 3-1/2
Brand: Tianjin Dongfanglong Petroleum Equipment Manufacture Co., Ltd.
SKU: 2075367132

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

US$2.36

500 Pieces

Sample price:US$50.00/piece.Request sample

Product profile

Warranty

1 Year

Name

API 5CT Tubing and Casing Coupling for Oil Pipe 2-

Thread

EU Nu Bc LC Sc

Model NO.

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

Grade

K55 J55 L80 N80 P110

Usage

Oil Pipe

Transport Package

Wooden Pallet

Specification

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

Trademark

EASTLONG

Origin

Puyang China

HS Code

7307990000

Production Capacity

5000PCS One Day

Key features

API 5CT Certification: Products meet API 5CT specifications with authorized certification from American Petroleum Institute.

Wide Grade Selection: Available in J55, K55, N80, L80, P110 and other steel grades for various applications.

Thread Interchangeability: Processed by CNC lathes ensuring commonality and interchangeability of EU, NU, LC, SC threads.

Comprehensive Testing: Complete testing capabilities including tape, pitch, tooth depth, and profile analysis.

ISO Management Certified: Certified under ISO9001, ISO14001, ISO45001, and HSE management systems.

Fast Lead Time: Peak and off-peak season lead times both within 15 working days.

Global Export Experience: Products exported to 31 countries including USA, Russia, and UAE since 2019.

Flexible Payment Terms: Accepts LC, T/T, PayPal, and Western Union for international transactions.

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.