Welded Fittings

(Total 2 Products)

Forged Stainless Steel Threadolet

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Brand:Xinhuafeng
Min. Order:1 Piece/Pieces
Transportation:Ocean,Land,Air
Packaging:wooden case packing
Supply Ability:100000 Piece/ per Month

Threadolet: Advanced Branch Pipe Fitting Revolutionizing Pipeline ConnectionsAs a cutting-edge reinforced pipe fitting for branch pipe connections, Threadolet has gained widespread popularity in foreign markets in recent years, effectively...

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Slip-On Flange- Butt Weld & Flat Face Types

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Brand:Xinhuafeng
Min. Order:1 Piece/Pieces
Model No:ASTM A105
Transportation:Ocean,Land,Air
Packaging:wooden case packing
Supply Ability:100000 Piece/ per Month

Introduction to Welding LoopsWelding loops can be regarded as a special pipe fitting or connection method that plays a vital role in pipe systems. They connect pipes together by welding to form a continuous and complete pipe system, and can be...

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Welded Fittings are essential pipeline components creating permanent, high-strength connections in fluid systems through welding, designed to handle high pressures, temperatures, and demanding operational conditions. Unlike threaded or flanged fittings, they form a continuous bond with pipes via fusion welding, eliminating potential leak paths and ensuring structural integrity in critical applications across industries.

Available in diverse configurations, common types include elbows (45°, 90°), tees, reducers, caps, and crosses, each engineered to facilitate directional changes, branch connections, diameter transitions, or end sealing. They are categorized by welding method: Butt-Weld Fittings with flush-end connections for high-pressure systems, Socket-Weld Fittings where pipes insert into a socket before welding (ideal for small diameters), and Lap-Joint Fittings combining welding with Flange-like flexibility for alignment adjustments.

Materials are selected based on media compatibility and environmental factors: carbon steel fittings (ASTM A234) excel in industrial oil, gas, and water systems; stainless steel variants (ASTM A403) resist corrosion in chemical processing, food production, and marine environments; and alloy steel fittings withstand extreme temperatures in power plants and refineries. Specialized materials like duplex stainless steel or nickel alloys suit highly corrosive or high-temperature applications.

Welding processes vary by fitting type and material: TIG (Tungsten Inert Gas) welding ensures precision for thin-walled fittings, while MIG (Metal Inert Gas) welding offers efficiency for thicker sections. Proper welding techniques, including pre-heating and post-weld heat treatment, enhance joint strength and prevent brittleness in high-stress systems.

In system integration, welded fittings work synergistically with critical components: they connect to weld neck flanges for transition to flanged systems, pair with welded valves in high-pressure lines, and complement expansion joints to absorb thermal movement. They integrate seamlessly with steel pipes in industrial networks, ensuring uniform flow in complex layouts from oil pipelines to chemical plants.

Key advantages include exceptional pressure tolerance, leak resistance, and longevity. The welded bond eliminates risks, handling pressures up to 10,000 psi and temperatures exceeding 1,000°F. Their smooth internal surfaces minimize pressure loss and turbulence, optimizing system efficiency. By providing permanent, reliable connections, welded fittings form the backbone of industrial, energy, and infrastructure pipelines requiring uncompromising performance in demanding operational environments.

Welded Fittings

Welded pipe fittings refer to pipe fittings connected to pipes by welding. They are commonly used for steel pipes, non-ferrous metal pipes, polyvinyl chloride pipes, etc. They are particularly suitable for long pipelines, but not for pipelines that need to be disassembled frequently. Welded pipe fittings are important components that connect pipe fittings to pipes through welding processes to form a complete pipeline system.

Material

carbon steel, stainless steel, alloy steel, non-ferrous metals and plastics etc.

Application scenarios

petroleum, chemical, electric power, metallurgy, shipbuilding, food, medicine and other industries

Product Detail

When selecting welded pipe fittings, it is necessary to ensure that the selected pipe fittings can meet the use requirements and the appropriate welding process.

Selection principles: When selecting welded pipe fittings, it is necessary to comprehensively consider factors such as the working pressure, temperature, medium characteristics and installation environment of the pipeline system to ensure that the selected pipe fittings can meet the use requirements.

Welding process: When welding pipe fittings, the commonly used welding methods are fusion welding and brazing. Fusion welding is suitable for most metal pipe fittings, while brazing is mostly used for non-ferrous metal pipe fittings such as copper pipes. Specific welding processes include manual arc welding, gas shielded welding, argon arc welding, etc.

For occasions where sealing is required, the radius elbow may be equipped with sealing elements such as gaskets, O-rings, etc. These sealing elements can effectively prevent medium leakage and ensure the safety and stability of the pipeline system.

CUSTOMER

VOICE

WHAT A CLIENT SAY?

Most customers are satisfied with the durability of welded pipe fittings, believing that they can withstand certain pressure and wear and are suitable for a variety of industrial environments. Some customers specifically mentioned that welded pipe fittings used under harsh conditions (such as high temperature, high pressure, and corrosive environment) still perform well. Most customers are satisfied with the appearance and workmanship of welded pipe fittings, believing that their surface is smooth, burr-free, and the welding quality is good. Some customers specifically mentioned that the manufacturer pays attention to detail processing in the production process of welded pipe fittings, which improves the overall quality of the product. Most customers believe that welded pipe fittings are cost-effective and can reduce production costs while ensuring quality. Some customers specifically mentioned that compared with similar products, welded pipe fittings have obvious advantages in performance and service life.

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Application areas

The application areas of pipelines are very wide, mainly including municipal engineering, building water supply and drainage, industrial production, agricultural irrigation, new energy and other fields.

FAQ

Important things you should know

What are the specifications and models of welded pipe fittings?

1.2-inch welded pipe fittings, with a diameter of about 4 cm. 1.5-inch welded pipe fittings, with a diameter of about 4.8 cm. 2-inch welded pipe fittings, directly about 5 cm. 2.5-inch welded pipe fittings, with a diameter of about 6.5 cm. 3-inch welded pipe fittings, with a diameter of about 8 cm. 4-inch welded pipe fittings, with a diameter of about 10 cm. And so on.

Common pipe connection methods and leakage causes?

Threaded connection, leakage causes: (1) The thread processing of the pipeline does not meet the requirements, the thread is too deep and worn, causing leakage at the threaded connection. (2) When installing the threaded joint, the thread and the fitting are too loose, the filler of the threaded connection is not installed in place or the material quality does not meet the requirements, causing leakage at the connection. (3) After the pipeline is installed, the pressure and tightness tests are not fully carried out, and the cracks in the pipeline, the sand holes on the fittings, and the inadequate construction of the interface are not discovered and handled in time. (4) The spacing of the pipeline brackets is improperly set, the elevation deviation, and the overall force of the pipeline is uneven after installation, resulting in the existence of a shoulder at the joint; the pipe diameter change uses a larger and smaller head and the length of the short thread is too long, resulting in leakage due to uneven force. (5) The foundation involved in the underground pipeline is not compacted properly, the force at the pipeline connection is concentrated or too large, and the connection is broken.

What are the 8 common connection methods for pipelines?

According to the purpose and pipe material, the commonly used connection methods for pipes are: threaded connection, flange connection, welding, groove connection (clamp connection), sleeve connection, compression connection, hot melt connection, socket connection, etc.

How to weld the pipe on one side and double side?

Use 422 welding rod with a diameter of 3.2 mm, a gap of 3 to 4 mm, and single-sided welding and double-sided forming technology. When welding, the electrode is tilted downward by about 70 to 80 degrees, the current is about 115 amperes, and the thrust is about three units. Each arc should accurately press one-third of the molten iron, open the molten hole, ensure that the back is welded through, and complete the welding process quickly and stably.

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Welded Fittings

Forged Stainless Steel Threadolet

Slip-On Flange- Butt Weld & Flat Face Types

Forged Stainless Steel Threadolet

Slip-On Flange- Butt Weld & Flat Face Types