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4-1/2" N80q EU Tubing Coupling

Name: 4-1/2" N80q EU Tubing Coupling
Brand: Tianjin Dongfanglong Petroleum Equipment Manufacture Co., Ltd.
SKU: 2249580885

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

US$150.00

1 Piece

Product specifications

4-1/2

Sample price:US$88.00/piece.Request sample

Product profile

After-sales Service

Replacement Within Warranty

Warranty

Three Months

Certification

ISO 9001:2000, ISO 9001:2008

Model NO.

4-1/2 N80-Q EU

Power Source

Manual

Operation Pressure

Manual

Applicable Medium

Crude Oil

Structure

Coupling Type

Material

Transport Package

Box

Specification

22.9 × 31.1 × 31.1 cm

Trademark

DFL

Origin

China

HS Code

7307210000

Production Capacity

5000000 Pieces/Year

Key features

High Mechanical Strength: N80Q grade steel ensures superior yield and tensile strength for demanding well conditions.

Superior Sealing Performance: EU external upset thread design provides tight, leak-free connections with high torque resistance.

Precision Machining: High thread accuracy ensures smooth make-up and easy installation in oil and gas wells.

Corrosion Resistance: Optional surface treatments available to enhance protection in harsh environments.

Compact and Reliable: Standard 158.75 mm length, optimized for high-pressure tubing strings.

Global Certification: ISO 9001, ISO 14001, ISO 45001, HSE certified, and API 5CT authorized supplier.

Custom Engineering Service: Supports customization of thread types and steel grades to meet specific project needs.

Fast Delivery: Standard couplings delivered in 15-25 days; custom orders in 30-40 days.

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.

Product Q&A

Q:Can I customize the thread type or steel grade?

Yes, we support 000EUE, NU, LC, BTC, and premium thread options.

Q:What export documents do you provide?

Commercial invoice, packing list, MTC, certificate of origin, license copy, etc.

Q:How can I place an order?

Q:What is the warranty period?

We provide a three-month warranty with replacement within the warranty period.

Q:What are the main applications for this coupling?

Ideal for oil and gas production wells, medium to deep well tubing strings, high-pressure and geothermal wells, oilfield transportation lines, and workover and completion operations.