U BEND
U BEND - industrial steel product
Carbon & Alloy Elbow Tee Reducer Cap Flange ASME B16.9 GB/T12459
Factory supply seamless carbon & alloy pipe fittings, custom wall thickness & radius, heat treatment, 100% UT/MT/PT NDT, complete MTC certification for thermal power, chemical and overseas EPC pipeline projects.
Butt weld pipe fittings allow for changing the direction of flow, reducing pipe sizes and attaching auxiliary equipment.
A common example using welded pipe fitting is a pipe reduced by concentric reducer, welded to a weld neck flange and connected to an equipment.
Pipe flanges are basically plates or rings used to connect pipes, valves and other piping equipment to form a piping system.
A flange standard lays down the dimensions, surface finish, facing type, marking, material and technical specifications for flanges.
Expansion joints are installed in a piping system to absorb vibration and shock.
Expansion joint comes in two forms either restrained or unrestrained styles and although the bellows membrane incorporated in both styles look similar it is of great importance to recognize that they are used for entirely different applications.
They are designed to provide a secure and leak-free connection while withstanding corrosive environments and high temperatures.
Fittings are components used to connect, join, or adapt different parts of a piping or tubing system. They serve multiple purposes across plumbing, HVAC, manufacturing, and construction applications.
Fittings create secure, leak-free joints between pipes, tubes, or hoses.
Flanged
Butt Welded
Allow changes in flow direction using elbows, bends, and sweeps.
Adapt pipes or tubes of different diameters to ensure system compatibility.
Enable splitting of flow into multiple directions using tees, crosses, and laterals.
Integrate valves or flow-control devices to regulate or stop flow as required.
Include pressure-relief valves or regulators to maintain safe operating pressures.
Provide inspection ports, unions, and couplings to simplify maintenance and testing.
Connect piping systems to pumps, tanks, heat exchangers, and other equipment.
Note: Fitting selection depends on fluid type, pressure, temperature, and system layout. Proper specification ensures safety, reliability, and long-term performance.
Seamless pipe fittings are hot-formed, weld-free components designed to change pipeline direction, branch flow, adjust diameter and seal pipe ends. They are widely used with seamless steel pipes in power generation, petrochemical, district heating and oil & gas transmission systems.
All seamless fittings are manufactured by integral hot forming without internal welds, ensuring high safety under long-term high-temperature and high-pressure service.
We supply a full range of carbon and alloy fittings compliant with ASME and Chinese GB standards, compatible with ASTM A335 alloy pipes and GB 20# / 15CrMoG boiler tubes. Custom bend radius, wall thickness, heat treatment and anti-corrosion options are available for domestic tenders and overseas EPC pipeline projects.
| Fitting Type | Typical Specifications | Function |
|---|---|---|
| Seamless Elbow | 45° / 90° / 180° Short Radius (SR) / Long Radius (LR) |
Change fluid flow direction |
| Equal / Reducing Tee | Straight tee, lateral reducing tee | Branch pipeline for flow diversion |
| Concentric / Eccentric Reducer | Concentric straight, eccentric anti-cavitation | Adjust pipeline inner diameter |
| Pipe Cap / End Cap | Hemispherical, elliptical flat cap | Seal pipeline terminal |
| Stub End (Lap Joint) | Standard wall thickness for loose flange | Support lap joint flange connection |
| Forged Flanges | WN / SO / BL Class 150–2500, PN10–PN160 |
Detachable pipeline connections |
| Standard System | Standard Code | Scope |
|---|---|---|
| ASME | ASME B16.9 | Factory-made seamless butt-welding fittings |
| ASTM Material | ASTM A234 WPB / WP11 / WP22 | Carbon & alloy fitting material specification |
| Chinese GB | GB/T 12459 | Hot-formed seamless butt-welding fittings |
| Chinese Boiler | GB/T 13401 | Large-diameter welded fittings |
| Flange Standard | ASME B16.5 / GB/T 9113 | Forged flanges and gaskets |
Visual Inspection is conducted on fittings to check any surface imperfections. Both fittings body and weld are checked for any visible surface imperfections such as dents, die marks, porosity, undercuts, etc. Acceptance as per applicable standard.
For packing of carbon steel flanges with painting,we would use the bubble wrap to protect the painting.For flanges without painting or oiled with long-term shipment,we would suggest client to use the anti-tarnish paper and plastic bag to prevent the rust.
Ceramic lined pipe is made through self-propagating high-temperature synthesis (SHS) technique.
Cast basalt lined steel pipe is composed by lined with cast basalt pipe, outside steel pipe and cement mortar filling between the two layers.
Ceramic tile lined pipes have very uniform coating of specially formulated ceramic material that is affixed to the inner of the pipe.
The material of the rare earth alloy wear-resistant pipe is ZG40CrMnMoNiSiRe, which is also the grade of rare earth alloy steel.
Tubes Erosion Shields are used to protect boiler tubing from the highly erosive effects of high temperatures and pressures thereby greatly extending tube life.
The ASTM A213 T91 seamless tubes are primarily used for boiler, superheater, and heat-exchanger.
When you partner with Sunny Steel, you can stop worrying about meeting deadlines thanks to our responsive and timely service. You'll also say goodbye to unnecessary shopping around. Instead, you'll get white glove service from an expert who understands your needs and can get you the materials you need quickly.
