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Forged Fittings &
Clad Pipe Solutions

Premium bimetal composite pipes, high-pressure forged fittings, flanges, olets, and anti-corrosion piping systems for global industrial applications.

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Industrial Expertise

Serving oil, gas, chemical, and power generation sectors worldwide.

Global Certifications

ISO, API, ASME, PED, GOST, and classification society approvals.

Export-Ready

Products exported to Middle East, Europe, Asia, and Americas.

Factory Overview

About Longtaidi

Longtaidi Technology (Beijing) Co., Ltd. is headquartered in Tongzhou District, Beijing, with its manufacturing base in Cangzhou Economic Development Zone — strategically located within the Beijing-Tianjin-Hebei metropolitan circle.

We are a professional high-tech enterprise integrating the design, research, manufacturing, and sales of bimetal-lined pipes and fittings. Our mission is to deliver high-end, high-quality products that serve as a reliable bridge between global partners and industrial excellence.

10+
Years Experience
50+
Countries Served
1000+
Projects Delivered

Our Products

High-performance piping components engineered for durability, corrosion resistance, and extreme pressure environments.

Mechanically Lined Pipes

Mechanically Lined Pipes

Bimetal composite pipes with corrosion-resistant inner layer and carbon steel outer shell. Ideal for chemical and offshore applications.

Standards: ASME B36.10M, API 5L
Overlay Clad Pipe

Overlay Clad Pipe

Weld overlay process applied to carbon steel base for superior corrosion resistance in aggressive environments.

Materials: 316L, 825, 625, C276
Clad Pipe Fittings

Clad Pipe Fittings

Elbows, tees, reducers with internal cladding for seamless integration into clad piping systems.

Standards: ASME B16.9, B16.11
Forged Fittings

Forged Fittings

High-pressure forged fittings made from A105, F304, F316, etc. Used in petrochemical and power plants.

Pressure: 3000# to 9000#
Socket Weld Fittings

Socket Weld Fittings

Precision-forged socket weld elbows, tees, couplings. Ideal for small-bore high-pressure lines.

Standard: ASME B16.11
Threaded Fittings

Threaded Fittings

NPT and BSPT threaded fittings in carbon and stainless steel for reliable leak-free connections.

Sizes: 1/8" to 4"
Flangeolet

Flangeolet

Combination of flange and olet for direct branch connections with flanged termination.

Material: A105, SS304, SS316
Butt Weld Fittings

Butt Weld Fittings

Seamless and welded elbows, tees, reducers, caps in carbon and alloy steels.

Standards: ASME B16.9, MSS SP-75
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Advanced Manufacturing Technology

Precision engineering and proven processes ensure reliability and performance.

Weld Overlay Process

Our overlay clad pipes are manufactured using automated submerged arc welding (SAW) or gas tungsten arc welding (GTAW) to deposit a corrosion-resistant alloy layer on carbon steel substrates.

  • Uniform thickness control
  • Minimal dilution of base metal
  • Full penetration and defect-free overlay
  • Post-weld heat treatment (PWHT) available
Weld Overlay Process
Forging Technology

Forging Technology

We utilize hot forging processes to produce high-strength fittings with excellent grain structure and mechanical properties.

  • Closed-die forging for precision
  • Heat treatment for enhanced strength
  • Machining to tight tolerances
  • NDT inspection (UT, PT, MT)

Global Certifications

Our quality management systems meet the highest international standards.

ISO 9001

ISO 9001

ISO 14001

ISO 14001

OHSAS 45001

OHSAS 45001

ASME

ASME U/PP

API

API Q1

PED

PED

Additionally certified by classification societies: CCS, LR, BV, ABS, and Russian GOST. Our products comply with ASME, ASTM, API, and HG/T standards.

Frequently Asked Questions

What is a clad pipe?

A clad pipe is a composite pipe with a carbon steel outer layer and a corrosion-resistant alloy inner layer. It combines strength and cost-efficiency with excellent resistance to corrosion, erosion, and high temperatures.

What is the difference between mechanically lined and overlay clad pipes?

Mechanically lined pipes use a pre-formed corrosion-resistant liner inserted into a carbon steel pipe, while overlay clad pipes are made by welding a corrosion-resistant alloy layer directly onto the inner surface of a carbon steel pipe.

What does A105 mean?

A105 is an ASTM specification for carbon steel forgings used for piping components. It is a low-carbon, manganese-silicon steel suitable for high-pressure applications.

What is a flangeolet?

A flangeolet is a pipe fitting that combines a flange and an olet (branch connection). It allows for a direct flanged branch connection from a main pipe, simplifying installation and reducing leak points.

Do you offer custom sizes and materials?

Yes, we provide OEM and ODM services. We can manufacture fittings and pipes according to customer specifications, including special dimensions, materials, and testing requirements.

Get in Touch

Reach out for product inquiries, quotes, or technical support.

Contact Information

Email: longtaidi.tech@gmail.com

Mobile/WhatsApp: +86 156 0116 3555

Tel: +86 0317 6298 666

WeChat: +86 156 0116 3555

Skype: +86 156 0116 3555

Address: No.332, 406 Building, Jingzhou Park, Tongzhou District, Beijing, China.

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