BS 3293 Standard Welding Neck,Slip On Flange (150lb-600lb)

PDF: BS 3293 standard weld neck flange slip on flange dimensions

BS 3293 Standard Welding Neck,Slip On Flange (150lb-600lb).

British Standard BS 3293:1960-Carbon Steel Pipe Flanges (over 24 inches nominal size) for the Petroleum Industry,covers Class 150 lb to 600 lb weld neck and slip on flanges.

Dimensions and Tolerances. Tolerances on flange dimensions (BS 3293 : 1960)

	Dimension	Tolerance
		in	mm
Weld Neck and Slip On Flanges (pages 8-56 to8-59)	G (raised face diameter)	±1/64	±0.40
	C (flange thickness)	+3/16, -0	+4.76, -0
	D (overall length)	±1/8	±3.18
	E (outside diameter at welding end of weld neck hub)	+5/32, 1/32	+3.97, -0.79
	B (inside diameter of weld neck flange)	+1/8, 1/16	+3.18, -1.59
	B (inside diameter of slip on flange)	+1/16, -0	+1.59, -0
Ring Joint Facingon Weld Neck and Slip On Flanges (see below)	L (depth of groove)	+1/64, -0	+0.40, -0
	M (width of groove)	±0.008	±0.20
	K (pitch diameter of groove)	±0.005	±0.13

 Ring Joint Facings-BS 3293.

BS 3293 weld neck flange slip on flange dimensions class150.

BS 3293 weld neck flange slip on flange dimensions class300.

BS 3293 weld neck flange slip on flange dimensions class400.

BS 3293 weld neck flange slip on flange dimensions class600.