Alloy 20 Valve Manufacturer in India

Alloy 20 valves may be selected for corrosive process services, particularly where conventional stainless-steel grades such as SS316 do not provide sufficient resistance to sulfuric acid. Alloy 20 also provides resistance to pitting and chloride stress-corrosion cracking in suitable environments, although material compatibility depends on the complete process chemistry, concentration and temperature. Valve type, trim and sealing materials should be selected according to the complete process chemistry and pressure-temperature conditions.

Alloy 20 vs SS316:

Alloy 20 may be considered where SS316 does not provide sufficient corrosion resistance, particularly in selected sulfuric-acid services. Its nickel, chromium, molybdenum and copper content contributes to its corrosion behaviour, but the final material choice should be based on acid concentration, temperature, contaminants and the complete process environment.

Alloy 20 Valve Types:

Alloy 20 Ball Valve: Tight shut-off for corrosive process lines.
Alloy 20 Butterfly Valve: Compact quarter-turn isolation or regulation for compatible corrosive process lines.
Alloy 20 Check Valve: Automatic prevention of reverse flow in compatible process lines.
Alloy 20 Gate Valve: Isolation with low flow restriction when fully open.
Alloy 20 Globe Valve: Throttling and controlled flow regulation.

Material Compatibility:

Material selection should consider the process medium, acid and chloride concentration, operating temperature, pressure and other constituents that can influence corrosion behaviour.

Alloy 20 Valve Specifications:

Parameter	Technical Details
Material	Alloy 20
UNS Grade	N08020
Werkstoff Number	2.4660
Cast Grade	ASTM A351 CN7M
Size	Configuration-dependent
Pressure Class	Configuration-dependent
PN Rating	Configuration-dependent according to valve design
Body / Bonnet	Alloy 20 construction according to valve design
Trim	Alloy 20 or compatible corrosion-resistant alloy
Seat Options	PTFE, RPTFE or metal-seated configurations, depending on valve type and service conditions
End Connections	Flanged, Butt Weld, Socket Weld, Threaded
Operation	Manual, gear, pneumatic or electric operation, depending on valve type
Design Standards	Applicable valve-specific design standard according to valve type and construction
Testing Standards	API 598, ISO 5208 or applicable project testing requirements, depending on valve design
Face-to-Face	ASME B16.10 where applicable to the selected valve design
Flanged Ends	ASME B16.5 where applicable
Butt-Weld Ends	ASME B16.25 where applicable

Alloy 20 Corrosion Resistance:

Alloy 20 contains significant nickel and chromium together with molybdenum and copper. Copper contributes to its resistance in selected sulfuric-acid environments, while nickel, chromium and molybdenum contribute to its overall corrosion behaviour. Actual suitability still depends on acid concentration, temperature and other constituents in the process stream.

Alloy 20 Valve Testing:

Inspection should include material identity and traceability, dimensional checks, pressure integrity, seat leakage and the condition of critical wetted surfaces. Material certification and traceability are particularly important for Alloy 20 pressure-containing and specified wetted components.

Testing can be performed according to applicable API 598, ISO 5208 and project requirements, with inspection documentation and material certificates provided where specified.

Alloy 20 Valve Applications:

Alloy 20 valves may be selected for:

Compatible Chemical Transfer: Isolation, flow control or transfer duties for corrosive process chemicals.
Sulfuric Acid Processing and Transfer: Selected duties where acid concentration, temperature and process chemistry support Alloy 20 selection.
Corrosive Petrochemical Process Lines: Isolation or flow-control duties where the process chemistry requires Alloy 20 construction.
Chemical Storage and Transfer: Valve duties for compatible corrosive chemicals after material-compatibility review.
Mining and Mineral Processing: Selected corrosive chemical or process-fluid duties where Alloy 20 is compatible with the actual medium.

Share the process medium, chemical concentration, operating temperature and pressure with Speciality Valve for Alloy 20 material suitability and valve configuration review.