Malleable Iron 330 Flat Seat Union NPT Thread

Size: 3/8”-4”
aterial: ASTM A197/A197M
Dimension: ASME B16.3, B16.14
Union Dimension:B16.39
Thread: ASME B1.20.1
Pressure Rating: 363PSI,CLASS150
Surface Treatment: Black
Certificate: UL Listed / FM Approved / NSF 61
Application: Fire Protection,Waterworks,HVAC,Plumbing,GAS,Irrigation,or other piping systems

We’re here to help:
Easy ways to get the answers you need.

Product Description

Products Details

Union joints can be widely used in pipes, water meters and valves of different diameters. Due to the socket structure, the cost of pipe joints is reduced, and installation, use and maintenance are very convenient. At the same time, it also has a very high leak-proof ability, which has great market prospects.

1. High union strength and good ductility. 2. The connection is convenient, fast and easy to operate. 3. Convenient and intuitive detection. 4. Construction connection no electricity, no gas, no open flame operation, no oil leakage, no pollution, no rain or wind, all-weather construction. 5. Strong applicability, flexible operation in narrow and narrow places with dense reinforcement and arrangement.

Fluid Tech group union, three parts perfect fit, high thread accuracy, good air tightness, no water leakage, no air leakage, widely used in fire protection system and water system.

Product Drawing

Size A(mm) PCS/CTN. Size A(mm) PCS/CTN.
1/4” 1 1/2” 68 36
3/8” 280 2” 76 28
1/2” 46 180 2 1/2” 83 12
3/4” 50 120 3” 80 10
1” 56 88 4” 100 6
1 1/4” 63 56 6”


Advantages of threaded unions:

Threaded union refers to the pipe connection with thread, which is the most common pipe fitting in industry and life. The threaded union makes the connection of the pipe simpler, and the disassembly and replacement are easier, which greatly saves the cost of pipe connection. Industrial thread unions are generally made of metal, with high pressure resistance, and materials include carbon steel, stainless steel, alloy steel, brass, etc.; The thread union materials used in life generally include PC, PVC, PE, etc.
1. The thread union has high strength and good ductility, which can give full play to the strength and ductility of the steel base metal.
2. Convenient, fast and simple operation.
3. The detection is convenient and intuitive.
4. The straight thread of steel bar processing can be prefabricated, and the sleeve can be produced by factory, which does not occupy the construction period and has high processing efficiency.
5. No electricity, no gas, no open flame operation, no oil leakage and no pollution, no wind or rain, all-weather construction.
6. Strong applicability, flexible operation in small site where the steel bar arrangement is dense.
7. It can connect horizontal, vertical and oblique HRB335 and HRB400 grade steel bars of the same diameter or different diameter.

Application and Case

Products are used in fire protection system, water system, HVAC system, plumbing, gas system, irrigation system, etc.These products are used in many projects , such as Beijing Airport, Shanghai World Trade Center, Canton Tower and other famous landmark projects.