What payment terms do you accept?

We accept LC, T/T, PayPal, and Western Union as payment methods.

What certifications does the company hold?

We hold ISO9001, ISO14001, ISO45001, HSE, and an authorized API 5CT certificate.

What is the difference between EUE and NUE couplings?

EUE couplings have higher joint strength and are 100% efficient, while NUE couplings have a smaller diameter suitable for limited clearance.

API 5CT Tubing and Casing Coupling 5-1/2 Bc L80-1 Coupling

Name: API 5CT Tubing and Casing Coupling 5-1/2 Bc L80-1 Coupling
Brand: Tianjin Dongfanglong Petroleum Equipment Manufacture Co., Ltd.
SKU: 2178021562

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

US$17.14

50 Pieces

Sample price:US$17.98/piece.Request sample

Product profile

Warranty

1 Year

Name

API 5CT Tubing and Casing Coupling 5-1/2 Bc L80-1

Thread

Bc LC Sc

Grade

K55 J55 L80-1 N80q P110

Usage

Oil Pipe

Transport Package

Wooden Pallet

Specification

5-1/2

Trademark

EASTLONG

Origin

Puyang China

Production Capacity

5000 PCS One Day

Key features

API 5CT/5B Compliance: All couplings strictly meet API Specifications 5CT and 5B standards for oil and gas applications.

Wide Grade Selection: Available in J55, K55, N80, L80-1, and P110 grades to suit various well conditions.

EUE 100% Joint Efficiency: External Upset End design offers joint strength greater than the pipe body for tension and pressure.

Comprehensive Mechanical Testing: Includes tensile strength, impact test, chemical control, and sulfide stress cracking tests.

Premium Thread Options: Rigorous control over thread quantity, angle, and tolerances for enhanced connection integrity.

PSL-2 and PSL-3 Certification: Product Specification Levels available to ensure high-quality material performance.

ISO and API Certified: Certified by ISO9001, ISO14001, ISO45001, HSE, and authorized API 5CT certificate holder.

Fast Lead Time: Production completed within 15 workdays during both peak and off-peak seasons.

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.