Tolerance of flanges, dimension tolerance, welding neck, counter bore, diameter of hub, bolt hole spacing, bolt circle, Mumbai

TOLERANCE OF FLANGES

Tolerance of flanges, dimension tolerance, welding neck, counter bore, diameter of hub, bolt hole spacing, Mumbai

FLANGES

American Standard
- Class 150 Flanges
- Class 300 Flanges
- Class 600 Flanges
- Class 900 Flanges
- Class 1500 Flanges
- Class 2500 Flanges
- Schedule of Weldneck Flanges & Weights
- Tolerance of Flanges
British Standard
- BS 10 Table D & Table E
- BS 10 Table F & Table H
German Standard
BS EN 1092-1:2002
- PN 16 Dimensions
- PN 40 Dimensions

DIMENSIONS TOLERANCES OF FLANGES (in mm)

	Welding neck
*	outside diameter	O.D. 600 if smaller		+ 1.6 _
		O.D. over 600		+ 3.1 _


		250 and smaller		+ 0.7 _
	inside diameter	12 though 450		+ 1.6 _
	(bore)	500 and larger	+ 3.1	- 1.6


		1.6 raised face	+ 0.4 _
	diameter of	6.3 raised face tounge &
	contact face	groove male and female	+ 0.4 _


*	diameter of hub	125 and smaller	+ 2.2	- 0.7
	at point of weding	150 and larger	+ 4.0	- 0.7


	Thickness	450 and smaller	+ 3.1	- 0.0
		500 and larger	+ 4.7	- 0.0

	length through	250 and smaller		+ 1.6 _
	hub	300 and larger		+ 3.1 _


	bolt circle	600 and smaller		+ 0.7 _
		600 and larger		+ 1.6 _

	drilling	bolt hole spacing		+ 0.7 _


	eccenticity with respect
	to bore			0.70 max

	Threaded, Slip on lap joint, Socket welding and blind

*	outside diameter	O.D. 600 or smaller		+ 1.6 _
		O.D. over 600		+ 3.1 _

	inside diameter	threaded : to stand gauge limit
	(bore)	slop on .lap joint : socket-welding
		250 and smaller	+ 0.7	- 0.0
		300 and larger	+ 1.6	- 0.0

		threaded
	diameter of	250 and smaller	+ 0.7	- 0.0
	counter bore	300 and larger	+ 1.6	- 0.0

*	outside diameter	300 and smaller	+ 2.3	- 1.6
	of hub	350 and larger		+ 3.1 _

	diameter of	1.6 raised face		+ 0.7 _
	contact face	6.3 raised fact tongue & grooved
		male & female		+ 0.4 _

	Thickness	450 and smaller	+ 3.1	- 0.0
	hub	500 and larger	+ 4.7	- 0.0

*	length through	450 and smaller	+ 3.0	- 1.6
	hub	500 and larger	+ 4.8	- 1.6

		bolt circle		+ 1.6 _


	drilling	bolt hole spacing		+ 0.7 _

	eccenticity with respect
	to bore			0.70 max

H Not covered by ANSI - B 16.5