AAP weld neck flange, 1"

This AAP weld neck flange is made from carbon steel to ANSI B16.5 Class 300. It is supplied in 9 sizes from 1" (25mm) to 12" (300mm).

A weld neck flange has a long tapered hub that is butt welded to the pipe, which passes load smoothly into the pipe wall. It is the usual choice where pressure, temperature or cyclic loading is higher. Forged steel flanges are commonly specified in the oil, gas, petrochemical and mining sectors, where pressure, temperature and safety considerations are higher. They are hot forged and then machined. A105 forgings are not recommended for prolonged use above 427 °C.

Where this product is used

• Pipework with higher pressure, temperature or cyclic loading
• Joints to flanged valves, pumps and vessels where a butt weld is specified
• Connections to pressure vessel and equipment nozzles
• Oil, gas, petrochemical and mining pipework

Features

• 9 sizes from 1" (25mm) to 12" (300mm)
• Made to ANSI B16.5 Class 300
• Material: carbon steel (ratings for ASTM A105 forgings)
• Raised face, 1.6mm raised face height
• Maximum working pressure 5,110 kPa (51.1 bar) up to 38 °C
• Tapered hub, butt welded to the pipe
• Marked where possible with heat number, size, table, grade and dimensional standard

Key specifications

Choosing the right option

Match the standard and table or class to the mating flange and compare the drilling dimensions, because flanges made to different standards are not interchangeable. Gaskets and bolting are not included.

Related AAP products: AAP Blind Flange, ANSI B16.5 Class 300, AAP Slip-On Weld Flange, ANSI B16.5 Class 300, AAP Screwed Flange NPT, ANSI B16.5 Class 300, AAP Weld Neck Flange, ANSI B16.5 Class 150.