What is the average lead time for orders?

The average lead time is within 15 workdays, regardless of peak or off-season.

What payment methods do you accept?

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

Where are your products exported to?

Our products are used in the USA, Brazil, Venezuela, India, Kazakhstan, Indonesia, and other regions.

Reliable 4inch Carbon Steel Coupling for Mining Use

Name: Reliable 4inch Carbon Steel Coupling for Mining Use
Brand: Tianjin Dongfanglong Petroleum Equipment Manufacture Co., Ltd.
SKU: 2117287962

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

1years

Warranty

1years

Transport Package

Pallets with Film

Specification

1100*990

Trademark

Eastlong

Origin

China

HS Code

7307990000

Production Capacity

1500000pieces/Year

Key features

API 5CT Certified Quality: Manufactured to strict API 5CT and API 5B standards for reliable performance.

Wide Grade Selection: Available in J55, K55, N80, L80, and P110 grades to suit various conditions.

Multiple Thread Types: Offers both NUE and EUE thread types for versatile connection options.

Diverse Size Range: Sizes from 1.9' to 4-1/2' with lengths from 2ft to 12ft available.

Global Export Experience: Products exported to USA, Brazil, India, and other international markets.

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

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