Key Components:
90°/45° elbows, tees, crosses, reducers, unions, pipe joints and connector bodies, flanges, socket-weld fittings, plugs and caps, pipe supports and clamps; nominal sizes DN15-DN300 and individual weights from 0.1 kg to 60 kg.
Precision Casting Solutions for Pipe Fittings
Pipe fitting castings are key pressure-bearing parts used for connection, direction changes, diameter transitions, branching, and sealing in pipeline systems. They are widely applied in oil and gas transmission pipelines, petrochemical piping, power plants and heating networks, shipbuilding and offshore piping, municipal water supply and drainage, fire protection systems, and building MEP systems. Pipe fittings directly withstand medium pressure, temperature fluctuation, and corrosion, so their quality is critical to pipeline safety.
We use low-temperature wax silica sol investment casting to produce high-pressure, corrosion-resistant, and irregular pipe fittings. The castings offer high dimensional accuracy, smooth surfaces, dense structure, and can be machined for threads, bevels, flange sealing faces, drilling, and tapping, enabling ready-to-install delivery.
Pressure Safety: 100% visual and dimensional inspection, with RT/UT NDT and hydrostatic testing available to ensure pipeline safety.
Complete Material Range: Carbon steel WCB/WCC/A105, stainless steel CF8/CF8M/316L, low-alloy steel, and duplex steel for different media and corrosion requirements.
Precision Near-Net Forming: Complex irregular fittings are formed in one piece, with smooth internal walls and reduced welding and assembly labor.
Finished-Part Delivery: Threads (NPT/BSPP/BSPT/metric), bevels, flange sealing faces, drilling, and tapping can be completed before shipment.
Stable Volume Supply: Automated shell-making and melting lines ensure batch consistency for project procurement and supporting supply.
The following are typical examples of pipe fitting castings (8 items shown); other specifications can be customized based on customer drawings and equipment models:
| No. | Part Name | Common Materials | Process / Remarks |
|---|---|---|---|
| 1 | 90°/45° Elbow | WCB / WCC / CF8M / 20# | Streamlined inner wall, socket weld or butt weld |
| 2 | Tee / Cross | WCB / CF8M / 20# / Q355B | Pressure pipeline branch, equal or reducing type |
| 3 | Union | 45 Steel / 42CrMo / 304 / 316 | Thread + spherical seal, high-pressure union |
| 4 | Reducer | WCB / CF8M / Q355B | Concentric or eccentric, pipeline diameter transition |
| 5 | Flange (Weld Neck / Socket Weld) | WCB / S355JR / 304 / 316 | Precision sealing face, high pressure rating |
| 6 | Pipe Joint / Connector Body | 45 Steel / 42CrMo / 316L | CNC-turned threads, flare or ferrule type |
| 7 | Socket-Weld Fitting | A105 / 20# / CF8M / 304 | Small-diameter high-pressure, 3000#/6000# |
| 8 | Pipe Support / Clamp | S355JR / Q355B / 42CrMo | Pipe support and fixing, weldable |
- Material Traceability: Each heat is analyzed by spectrometer, and heat numbers are linked to castings; EN 10204 3.1 material certificates are available.
- Dimensional Accuracy: Center-to-end distance, end-face angle, and thread precision are inspected according to GB/T 12459, ASME B16.11/B16.3, and related standards.
- Non-Destructive Testing: High-pressure fittings can undergo 100% RT or sampled UT/MT as required, ensuring no cracks, lack of fusion, or critical defects.
- Pressure Testing: Hydrostatic testing at 1.5 times nominal pressure can be performed, with no leakage or visible deformation during holding.
- Thread Inspection: NPT, BSPP, metric, and other threads are checked 100% with thread ring gauges and plug gauges to ensure interchangeable assembly.
- Stainless steel socket-weld fittings for petrochemical piping: CF8M/316L, 3000#/6000# pressure class, supplied to petrochemical engineering companies.
- Oilfield high-pressure unions and pipe connectors: 42CrMo/45 steel quenched and tempered, thread + spherical seal, used for fracturing and cementing equipment.
- Carbon steel elbows and tees for fire protection and municipal piping: WCB/Q355B, batch supply with prefabricated bevels for direct welding.
- Recommended combinations: Elbow + tee + reducer + flange sets; union + connector body + plug pipe connection sets.
- Custom threaded, socket-weld, flanged, and high-pressure fittings are available from drawings or samples.
Frequently Asked Questions (FAQ)
Pipe fitting castings can be produced to international standards or customer drawings, with pressure testing, thread inspection, and corrosion protection as required.
Which standards can pipe fittings comply with?
We can produce according to ASME B16.11 for socket-weld fittings, ASME B16.3 for threaded fittings, GB/T 12459, GB/T 14383, MSS SP-83/SP-95, and customer drawings.
What pressure ratings are available for high-pressure fittings?
Socket-weld and threaded fittings can be manufactured to Class 3000, Class 6000, and even Class 9000, with wall thickness and materials selected according to the relevant standard.
Can you supply threaded fittings and guarantee thread precision?
Yes. We can machine NPT, BSPP (G), BSPT (R), metric M, and other threads with CNC lathes, and inspect them 100% using thread ring gauges and plug gauges.
Can pipe fittings receive anti-corrosion treatment?
Yes. Carbon steel fittings can receive black oxide, electro-galvanizing, hot-dip galvanizing, epoxy coating, or anti-corrosion wrapping; stainless steel fittings can be pickled and passivated.
Request a Quote for Pipe Fitting Castings
Please provide fitting type, nominal diameter, pressure rating, material standard, and quantity; we will quote within 24 hours.