What are the payment terms?

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

What is the lead time for orders?

The average lead time is within 15 workdays for both peak and off-peak seasons.

Where is the manufacturer located?

Our factory is located in Tianjin Province, China, with over 285 employees.

High-Quality Threaded Couplings for Efficient Tubing and Casing

Name: High-Quality Threaded Couplings for Efficient Tubing and Casing
Brand: Tianjin Dongfanglong Petroleum Equipment Manufacture Co., Ltd.
SKU: 2121774852

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

Negotiable

1 Piece

Sample price:US$12.00/piece.Request sample

Product profile

After-sales Service

Yes

Warranty

1 Year

Manufacturing Process

CNC Milling

Model NO.

1.315-20"

Surface Treatment

Phosphating

Operation Pressure

Atmospheric Pressure

Material

Seamless Pipe

Product Name

Tubing Coupling

Size

1.315-41/2"

Thread

EU Nu

Grade

J55, K55, L80, N80, P110

Used for

Pipe Adapter

Surface

Painting

Transport Package

Wooden Case, Wooden Pallet

Specification

1.315-20"

Trademark

EASTLONG

Origin

Tianjin, China

HS Code

7307990000

Production Capacity

100000*/Month

Key features

Wide Size Range: Couplings available from 1.315 inches to 24 inches to fit various tubing and casing needs.

Multiple Thread Types: Supports NU, EU, NUE, EUE, TBG, UPTBG, and non-upset thread configurations.

High-Grade Materials: Manufactured from seamless pipe with grades J55, K55, L80, N80, P110, and C90.

Professional Surface Treatment: Options include whole phosphating or inside phosphating with outside coating.

20+ Years Experience: Over 20 years of manufacturing history with own factory and R&D center.

Robust Production Capacity: Equipped with 106+ manufacturing sets and 64 test devices for 24-hour supply.

Flexible Customization: Custom sizes, threads, and surface treatments available based on customer requests.

Secure Packaging Options: Packed in wooden cases, pallets, or iron cases to ensure safe global transport.

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.