Is this product API certified?

Yes, it is manufactured strictly in accordance with API 5CT standards and holds API certification.

5-1/2" Ltc Nq Casing Coupling (API Standard, Oil & Gas Drilling Use)

Name: 5-1/2" Ltc Nq Casing Coupling (API Standard, Oil & Gas Drilling Use)
Brand: Tianjin Dongfanglong Petroleum Equipment Manufacture Co., Ltd.
SKU: 1977615191

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

US$15.00

1 Piece

Sample price:US$15.00/piece.Request sample

Product profile

After-sales Service

Replacement Within Warranty

Warranty

Three Months

Certification

API

Model NO.

5 1/2 LTC NQ

Power Source

Manual

Operation Pressure

Manual

Applicable Medium

Crude Oil

Structure

Coupling

Material

Transport Package

Box

Trademark

DFL

Origin

China

HS Code

8431431000

Production Capacity

5000000 Pieces/Year

Key features

API 5CT Certified Quality: Manufactured strictly according to API 5CT standards with authorized API license.

High Strength Alloy Steel: Made of high-quality alloy steel for excellent strength and pressure resistance.

Reliable Threaded Connection: Precise threading ensures tight sealing and prevents leakage in harsh environments.

Corrosion Resistant Design: Suitable for challenging drilling conditions with excellent corrosion resistance.

Customizable Options: Supports customization of thread types (EUE, NU, LC, BTC) and steel grades.

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

Comprehensive After-Sales: Three-month warranty with replacement service and strong technical support.

Global Export Capability: Exported to 31 countries with full export documents including MTC and COO.

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.