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Product profile
After-sales Service
YesWarranty
1 YearManufacturing Process
CNC MillingSurface Treatment
PhosphatingOperation Pressure
Atmospheric PressureMaterial
Seamless PipeProduct Name
Tubing CouplingSize
1.315-41/2"Thread
EU NuGrade
J55, K55, L80, N80, P110Used for
Pipe AdapterSurface
PaintingTransport Package
Wooden Case, Wooden PalletSpecification
1.315-20"Trademark
EASTLONGOrigin
Tianjin, ChinaHS Code
7307990000Production Capacity
100000*/MonthKey features
Wide Grade Range: Available in J55, K55, N80-1, N80-Q, L80, C90, and P110 grades.
Extensive Size Options: Coupling sizes range from 1.315 inches to 24 inches.
Custom Thread Types: Offers NU, EU, NUE, EUE, TBG, UPTBG, and various upset types.
Flexible Surface Treatment: Options include whole phosphating or inside phosphating with outside coating.
Customizable Product Specs: Product name, size, thread, grade, and surface can be customized per request.
Robust Manufacturing Capacity: Equipped with over 106 sets of manufacturing and 64 sets of test devices.
Rapid Production Capability: 24-hour production capabilities ensure continuous supply.
Experienced Manufacturer: Over 20 years of history in manufacturing and sales with own factory.
Company profile
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:What grades are available for this casing coupling?
A:
We supply J55, K55, N80-1, N80-Q, L80, C90, and P110 grades.
Q:What is the size range of the couplings?
A:
The coupling sizes range from 1.315 inches to 24 inches.
Q:Can the thread type be customized?
A:
Yes, we offer NU, EU, NUE, EUE, TBG, UPTBG, and non-upset or external-upset types.
Q:What surface treatment options are available?
A:
Options include whole phosphating or inside phosphating with outside coating.
Q:Do you offer custom product specifications?
A:
Yes, we supply premium thread products based on customer requests for name, size, thread, grade, and surface.
Send Inquiry
*To:
Tianjin Dongfanglong Petroleum Equipment Manufacture Co., Ltd.
Tianjin Dongfanglong Petroleum Equipment Manufacture Co., Ltd.*Content:
Supplier replies will be sent to your registered email
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