What is the maximum pressure rating?

The pressure rating can reach up to 15,000 PSI, depending on the size and grade.

What are the available shipping terms?

We offer FOB, EXW, CIF, and DDP international commercial terms.

Are the couplings suitable for sour service wells?

Yes, we provide NACE MR0175-compliant couplings suitable for H2S/CO2 environments.

Durable Casing Pipe Coupling for Secure Joint Solutions

Name: Durable Casing Pipe Coupling for Secure Joint Solutions
Brand: Tianjin Dongfanglong Petroleum Equipment Manufacture Co., Ltd.
SKU: 2118443442

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

US$40.00

1-49 Pieces

US$37.50

50-99 Pieces

US$34.90

100-999 Pieces

US$29.90

1,000+ Pieces

Product profile

Warranty

3 Months

Certification

ISO 9001:2000

Surface Treatment

Polishing

Model NO.

5-1/2

Structure

Seamless Pipe

Material

Seamless Pipe

Type

Casing Coupling

Transport Package

Wooden Pallet

Trademark

DFL

Origin

China

Production Capacity

50000

Key features

ISO 11960 Compliance: Manufactured to strict ISO 11960 standards for seamless performance.

Wide Size Range: Available in sizes from 4-1/2 inches to 20 inches.

Multiple Thread Types: Supports STC, LTC, BTC, and Premium thread types.

High Pressure Rating: Pressure rating up to 15,000 PSI depending on size and grade.

Diverse Material Grades: Offers J55, K55, N80, L80, P110, 13Cr, and Duplex Steel options.

Sour Service Compliance: NACE MR0175-compliant for H2S/CO2 environments.

OEM Custom Solutions: OEM support available for specific sizes, threads, or materials.

ISO 9001 Certified: Quality management certified under ISO 9001:2000.

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.