What quality checks are performed?

We conduct spot inspections and finished product inspections at each step of the production procedure.

What certifications does the product have?

Our API 5CT casing couplings are certified under ISO 9001:2008 and meet API Specification 5CT.

What steel grades are available?

We offer J55, N80, L80, and P110 steel grades to meet various operational requirements.

High Pressure API 5CT Casing Coupling for Oil and Gas

Name: High Pressure API 5CT Casing Coupling for Oil and Gas
Brand: Tianjin Dongfanglong Petroleum Equipment Manufacture Co., Ltd.
SKU: 2113176662

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

Negotiable

100 Pieces

Sample price:US$100.00/piece.Request sample

Product profile

Certification

ISO 9001:2008, API 5CT

Transport Package

Tray

Specification

1100*1100*1000

Model NO.

1.315"-4 1/2"

Production Capacity

500000

Key features

API 5CT Certified Quality: Meets API Specification 5CT standards with ISO 9001:2008 certification for reliability.

Wide Size Range: Available in tubing sizes 1.9'-4.5' and casing sizes 4.5'-20' for diverse applications.

Multiple Thread Types: Supports NU, EU, STC, LTC, and BTC thread types to match specific casing requirements.

Various Steel Grades: Manufactured in J55, N80, L80, and P110 grades to suit different pressure and stress conditions.

Robust Surface Treatment: Options include whole phosphating or inside phosphating with outside coating for corrosion resistance.

Rigorous Quality Inspection: Ensures product integrity through spot inspection and finished product checks during production.

Flexible Payment Terms: Accepts T/T, Western Union, LC, PayPal, and other standard international payment methods.

Fast Lead Time: Average production time is 15-25 days, with peak season lead times within 15 workdays.

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:How can I place an order?

You can contact us by email with your order details or place the order online.

Q:What payment methods do you accept?

We primarily use T/T and Western Union. Other accepted methods include LC, PayPal, and Western Union.

Q:What is the order procedure?

We discuss details via email or TM, issue a PI for confirmation, collect deposit or full payment, produce the goods, and arrange shipment after balance payment.

Q:What is the lead time for production?

We usually need 15-25 days if items are not in stock. Peak season lead time is within 15 workdays.

Q:How do you handle defective products?

We provide replacements or credit to the customer, which can be included in the next shipment.