ASA 150 Raised Face Weld Neck Schedule 40 ASTM A182 304L
The ASA 150 Raised Face Weld Neck Schedule 40 ASTM A182 304L is a precision forged pipe flange built for low-pressure industrial systems where reliability and corrosion resistance are non-negotiable. Rated to Class 150, safely handling up to 285 psi at ambient temperatures, -it delivers dependable joint integrity across a wide range of process conditions. Its raised face profile ensures consistent gasket seating and a leak-tight seal, while the long tapered weld neck hub distributes mechanical stress evenly along the pipe wall, reducing the risk of fatigue failure at the joint. Dimensionally matched to Schedule 40S stainless piping, it integrates without modification into standard pipeline configurations. The flange is forged from low-carbon 304L stainless steel, a material specification chosen deliberately: the reduced carbon content inhibits carbide precipitation during welding, protecting the surrounding heat-affected zone from intergranular corrosion and weld decay. This makes it particularly well-suited to aggressive service environments, including chemical and petrochemical fluid transfer lines, food, beverage, and pharmaceutical process utilities where material purity is critical, and water treatment applications such as desalination and municipal distribution systems.

Summary: 

• Pressure Rating: Class 150 (ASA/ANSI B16.5) - up to ~285 psi at room temperature
• Face Type: Raised Face (RF)
• End Connection: Weld Neck (WN) with long tapered hub for butt-weld attachment
• Wall Compatibility: Schedule 40S stainless steel piping
• Material: ASTM A182 Grade 304L forged low-carbon stainless steel

Applications: 

• Chemical processing
• Food & pharma 
• Water treatment
• General corrosive fluid handling