What payment methods do you accept?

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

Which ports are used for shipping?

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

What material grades are available?

Available grades include J55, P110, and L80.

High Quality API 5CT Tubing Casing Couplings 2-3/8 2-7/8 3-1/2

Name: High Quality API 5CT Tubing Casing Couplings 2-3/8 2-7/8 3-1/2
Brand: Tianjin Dongfanglong Petroleum Equipment Manufacture Co., Ltd.
SKU: 2131549172

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

US$5.00

10-999 Pieces

US$4.50

1,000+ Pieces

Sample price:US$20.00/piece.Request sample

Product profile

After-sales Service

1 Year

Warranty

1 Year

Transport Package

Pallets with Film

Specification

1100*1100

Trademark

Eastlong

Origin

China

HS Code

7307990000

Production Capacity

1500000pieces/Year

Key features

API 5CT Compliance: Strictly designed according to API specifications for reliable performance.

Comprehensive Warranty: Includes 1-year warranty and 1-year after-sales service coverage.

Multiple Coupling Types: Offers Non-upset, External-upset, Short Thread, Long Thread, and Buttress Thread options.

Versatile Size Range: Available in sizes 2-3/8, 2-7/8, and 3-1/2 inches for various applications.

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

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

Global Shipping Options: Ships via FOB, EXW, CIF, and DDP from Tianjin, Qingdao, and Shanghai ports.

Diverse Material Grades: Available in J55, P110, and L80 grades to meet specific project needs.

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.