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Welding Neck Flanges: This flange is circumferentially welded into the system at its neck which means that the integrity of the butt welded area can be easily examined by radiography. The bores of both pipe and flange match, which reduces turbulence and erosion inside the pipeline. The weld neck is therefore favoured in critical applications. http://www.pipelineflange.com

Standards:

ASME (ANSI) B16.5 Class150, Class 300, Class 400, Class 600, Class 900, Class 1500, Class 2500.

ASME B16.47 Series A (MSS-SP44) Class150, Class 300, Class 400, Class 600, Class 900.

ASME B16.47 Series B (API 605) Class75, Class150, Class 300, Class 400, Class 600, Class 900.

BS 3293 Class150, Class 300, Class 400, Class 600

DIN 2630, rated pressure 1 and 2.5.

DIN 2631, rated pressure 6.

DIN 2632, rated pressure 10.

DIN 2633, rated pressure 16.

DIN 2634, rated pressure 25.

DIN 2635, rated pressure 40.

DIN 2636, rated pressure 64.