What are the lead times?

Both peak season and off-season lead times are within 15 working days.

What are the main products?

Our main products include API 5CT Tubing and Casing Pipe, Pup Joints, Couplings, and Down Hole Tools/Cementing Tools.

API Petroleum Tubing Coupling 5-1/2 "" Geological Mining Well Cementing Tool Casing Tubing Coupling

Name: API Petroleum Tubing Coupling 5-1/2 "" Geological Mining Well Cementing Tool Casing Tubing Coupling
Brand: Tianjin Dongfanglong Petroleum Equipment Manufacture Co., Ltd.
SKU: 2120252752

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

US$7.00

10-99 Pieces

US$6.80

100+ Pieces

Sample price:US$7.00/piece.Request sample

Product profile

Products Name

API Petroleum Tubing Coupling 5-1/2 "" Geological

Used for

Oil Drilling and Production

Size

5-1/2"

Model NO.

5-1/2"

Surface Treatment

Phosphating

Materidl

Seamless Pipe Cpllar

Stock

200

MOQ

Transport Package

Wooden Box

Specification

5-1/2"

Trademark

EASTLONG

Origin

Henan, China

HS Code

7307990000

Production Capacity

50000/Year

Key features

API 5CT Certification: Meets API 5CT standards with over 17 years of certification history.

OEM Customization: Supports OEM branding and customization for specific requirements.

Diverse Material Options: Available in J55, K55, L80, N80, and P110 alloy materials.

1-Year Warranty: Comes with a comprehensive 1-year warranty coverage.

Quality Assurance: Includes pre-production samples and final inspection before shipment.

Global Export Experience: Selling to North America, Middle East, and other global markets since 1999.

Multiple Payment Terms: Accepts T/T, L/C, D/P, D/A, Cash, USD, EUR, and CNY.

Fast Lead Time: Peak and off-peak season lead times are within 15 working 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:Who are we?

We are based in Tianjin, China, started in 1999, with 101-200 employees. We sell to North America, Middle East, South Asia, Eastern Europe, South America, and Southeast Asia.

Q:How can you guarantee quality?

We always conduct a pre-production sample before mass production and perform a final inspection before shipment.

Q:What products can you buy from us?

We supply API Couplings, Tubing Couplings, Casing Couplings, API Pup Joints/Crossovers, and Tubing Centralizers.

Q:Why should you buy from us?

We have over 15 years of experience, are one of the largest manufacturers of API couplings in China and the world, and operate the biggest plant and workshop.

Q:What services can you provide?

We accept delivery terms FOB, CFR, CIF, EXW; payment currencies USD, EUR, CNY; and payment types T/T, L/C, D/P, D/A, Cash. We speak English, Chinese, French, and Korean.