Brass is a common material for gas valves, regulator bodies, nozzles and couplings because it machines accurately, forms good sealing surfaces and resists corrosion in many environments. Gas components are safety-related, so the specification needs to be thorough.
Define the application first
- Gas type — LPG, natural gas, compressed air, oxygen or others. Compatibility differs.
- Pressure and temperature range — operating and test pressures.
- Applicable standard — the national or product standard the part must meet, and any approval marks your market requires.
Choose grade and process accordingly
Valve bodies and fittings are commonly hot-forged from CW617N, then machined for threads and sealing faces. Smaller parts such as nozzles, jets and stems are turned from free-cutting CW614N. Consider plating where the environment is humid or corrosive.
Leak testing
State how parts must be tested — air under water, pressure decay or another method — and the acceptance criteria. Testing can be done on every piece or on a sample, depending on the part.
Media and material compatibility
Brass is not suitable for every gas. Ammonia can cause stress-corrosion cracking in brass, and equipment for acetylene is normally restricted to alloys with limited copper content. Always confirm compatibility for your specific media and local rules.
Threads and sealing
Choose the thread type for the sealing method: parallel threads with a face or O-ring seal, or taper threads with an approved sealant. See our thread standards guide for the differences.
We manufacture to your drawing and specification. Responsibility for approvals and regulatory compliance remains with the specifier, and we will supply the material and inspection records you need. Explore our gas parts range.
Have a drawing or specification in mind? Send it to our export desk and we will respond with a clear quotation.