Butt-Weld Pipe Fittings
Formed and fabricated fittings for pressure piping systems and demanding project service.
- Elbows
- Tees & crosses
- Concentric & eccentric reducers
- Caps & formed heads

Industrial pipe, fittings and flanges manufactured for critical energy, petrochemical and infrastructure projects worldwide.
Proven supply credentials
Product center
From core pressure-piping components to flexible products, supports and coordinated pipe supply, Longrun provides one accountable source for project requirements.
View all products and size capabilitySelected product views
View manufacturing galleryFormed and fabricated fittings for pressure piping systems and demanding project service.
Large-diameter and project-specific bends produced to drawing, radius and angle requirements.
Standard and customized forged connection components for industrial piping packages.
Flexible metallic products engineered to accommodate movement and connection requirements.
Factory-fabricated components and assemblies prepared for efficient project installation.
Coordinated pipe supply for complete project packages and matched component delivery.
Materials: carbon steel, alloy steel and stainless steel
Standard products and made-to-drawing project components
Manufacturing in focus
A closer look at Longrun's finished pipeline components, traceable product identification and in-process dimensional control.
Manufacturing confidence
Founded in 2005 in Yanshan, Hebei, Longrun operates a 125,000 m² manufacturing base with 321 employees and an annual production capacity of approximately 40,000 tons.
Longrun is a supplier to CNPC, SINOPEC and CNOOC, with pipeline products serving major energy projects.
Forming, machining, heat treatment and testing coordinated under one system.
Chemical, mechanical, hydrostatic and non-destructive testing across the production cycle.
Export experience across Southeast Asia, South Africa and Europe.
A 321-person team supported by engineers, technicians and licensed specialists.
Production capabilities
Verified qualifications
Our management systems and manufacturing capabilities are independently assessed for global energy, pressure equipment and marine projects.

Quality management system for the manufacture and sale of seamless pipe fittings.
Registration Q1-3309 · Valid through Mar 2029

Material quality assurance for butt-weld fittings and forged flanges under PED 2014/68/EU.
Certificate 03270/5/2025-CERT-01 · Valid through Feb 2028

China Classification Society works approval for steel pipe fittings intended for ships.
Certificate QH24PWA00038 · Valid through Feb 2030

Environmental management system covering pipe fittings, forged flanges, expansion joints and pipe supports.
ISO 14001:2015 · Valid through Jun 2029

Occupational health and safety management system for the principal manufacturing scope.
ISO 45001:2018 · Valid through Jun 2029
Products manufactured to international specifications
Selected project references
A selection of international and domestic supply experience across power, nuclear, steel, oil & gas and renewable energy projects.
Renewable Energy
Pipe fittings
Power Generation
Pipe fittings
Power Generation
Pipe fittings
Steel & Coking
Stainless steel pipe fittings
Nuclear Power
Corrosion-resistant pipes and pipe fittings
Nuclear Power
RCC-M grade pipe fittings
Oil & Gas
Pipes, fittings and flanges
Offshore Energy
Seamless steel pipes and pipe fittings
Project titles and supply scopes are translated from company qualification records. Contract values, quantities and commercially sensitive details are intentionally omitted.
Frequently asked questions
Explore 50 practical answers covering Longrun, product capabilities, materials, quality control and project ordering.
Hebei Longrun Pipeline Group is a China-based manufacturer and project supplier of pipe fittings, forged flanges, pipe bends and other pipeline components.
Longrun was established in 2005.
The company is located in Yanshan County, Cangzhou, Hebei Province, one of China's major pipeline-equipment manufacturing centers.
Longrun operates a manufacturing base covering approximately 125,000 square meters.
The company has an annual production capacity of approximately 40,000 tons.
Longrun has approximately 321 employees, including engineers, technicians, production specialists and qualified inspection personnel.
Longrun is a supplier to CNPC, SINOPEC and CNOOC.
Yes. Longrun has supplied products to projects in Southeast Asia, South Asia, the Middle East, South Africa and Europe.
Longrun serves oil and gas, petrochemical, power generation, nuclear power, marine, steel, mining, infrastructure and municipal pipeline projects.
Yes. Longrun supports EPC contractors with standard products, customized components and complete project piping packages.
The product range includes pipe fittings, pipe bends, forged flanges, expansion joints, metal hoses, pipe supports, prefabricated piping assemblies and steel pipe supply.
Longrun supplies elbows, tees, crosses, reducers, caps, formed heads and other made-to-drawing butt-weld fittings.
Longrun manufactures seamless and welded elbows in carbon steel, alloy steel and stainless steel.
Yes. Equal tees, reducing tees and crosses can be produced according to the required material, dimensions and standard.
Longrun supplies concentric and eccentric reducers for industrial piping systems.
Yes. Pipe caps, end caps and formed heads can be manufactured according to standard or project-specific requirements.
Yes. Pipe bends can be produced according to the required diameter, wall thickness, radius, angle, material and drawing.
Longrun's equipment supports the production of large-diameter bends up to DN2000, subject to material and technical evaluation.
Longrun can manufacture seamless tees up to DN700, subject to wall thickness, material and specification.
Yes. Longrun has production capability for seamless stainless steel elbows up to DN600, subject to technical requirements.
Available flange types include weld neck, slip-on, blind, socket-weld, threaded and customized forged flanges.
Yes. Longrun produces metal bellows expansion joints and customized expansion components.
Yes. Metallic flexible hoses and related connection assemblies are included in Longrun's product range.
Yes. Longrun manufactures pipe supports, hangers and customized supporting components.
Yes. Pipe spools and factory-prefabricated piping assemblies can be produced according to approved drawings.
Yes. Longrun can coordinate the supply of seamless and welded steel pipes as part of a complete project package.
The principal material categories are carbon steel, alloy steel and stainless steel.
Yes. Custom products can be manufactured according to customer drawings, samples, data sheets or project specifications.
Yes. Pipes, fittings, flanges, supports and fabricated components can be coordinated under one project package.
Yes. The company supports standard products, special dimensions and fully customized project components.
Products can be manufactured according to applicable ASME, ASTM, EN, DIN, GOST and JIS requirements.
Yes. Customer specifications can be reviewed together with the applicable product standard and drawings.
Yes. Longrun holds API Spec Q1 certification for its quality-management system within the certified manufacturing scope.
Yes. Longrun holds CE/PED certification covering applicable butt-weld fittings and forged flanges.
Yes. Longrun holds CCS Works Approval for applicable steel pipe fittings intended for ship applications.
Longrun holds ISO 14001 environmental-management and ISO 45001 occupational health and safety certifications.
Materials are controlled through identification, documentation and inspection throughout the manufacturing process.
Testing capabilities include chemical analysis, mechanical testing, impact testing, tensile testing, hydrostatic testing and dimensional inspection.
Available NDT methods include ultrasonic, radiographic, magnetic-particle and liquid-penetrant testing, depending on product requirements.
Third-party inspection can be coordinated when required by the customer or project specification.
The documentation package can include material certificates, inspection records, test reports, dimensional reports and other agreed quality documents.
Yes. Inspection and test requirements can be reviewed and agreed before production.
Please provide the product description, material grade, standard, size, wall thickness or schedule, quantity, inspection requirements and delivery destination.
Yes. The engineering team can review drawings and technical requirements before confirming manufacturability and pricing.
Trial orders can be considered after reviewing the product, quantity, material and production requirements.
Minimum order quantities depend on the product type, material, size and manufacturing process. Please contact the sales team for confirmation.
Lead time depends on product type, material availability, quantity, testing requirements and the agreed delivery schedule.
Urgent requirements can be evaluated against material availability and the current production schedule.
Yes. Packaging, marking and international delivery requirements can be agreed for each order.
Send your inquiry, drawings or bill of quantities to sales@longrunpipeline.com for technical and commercial review.
Start a conversation
Send your drawings, specifications or bill of quantities to our export team.