ASME B16.5 blind flanges, Class 300

Every size in the table, in mm, with a 3D model drawn from the same figures. See blind flanges for materials, standards and the marking.

Drag to turn the flange. Scroll or pinch to zoom.

6" Class 300 blind

Dimensions

Standard

Rating

Type

Units

Swipe the table sideways for every column. Choose a size to show it in the viewer.

Blind flanges, ASME B16.5 Class 300, dimensions in mm
DNNominal size	OFlange diameter	TfFlange thickness	RRaised face diameter	TrRaised face height	WBolt circle (PCD)	dBolt hole diameter	nNumber of holes	kgWeight, approx.	Enquiry list
15	95	12.7	34.9	2	66.7	15.9	4	0.7
20	115	14.3	42.9	2	82.6	19	4	1.2
25	125	15.9	50.8	2	88.9	19	4	1.5
32	135	17.5	63.5	2	98.4	19	4	2
40	155	19.1	73	2	114.3	22.2	4	2.9
50	165	20.7	92.1	2	127	19	8	3.4
65	190	23.9	104.8	2	149.2	22.2	8	5.1
80	210	27	127	2	168.3	22.2	8	7
90	230	28.6	139.7	2	184.2	22.2	8	8.9
100	255	30.2	157.2	2	200	22.2	8	11.8
125	280	33.4	185.7	2	235	22.2	8	15.5
150	320	35	215.9	2	269.9	22.2	12	21.3	In the viewer
200	380	39.7	269.9	2	330.2	25.4	12	35.2
250	445	46.1	323.8	2	387.4	28.6	16	57
300	520	49.3	381	2	450.8	31.7	16	82
350	585	52.4	412.8	2	514.4	31.7	20	106
400	650	55.6	469.9	2	571.5	34.9	20	140
450	710	58.8	533.4	2	628.6	34.9	24	178
500	775	62	584.2	2	685.8	34.9	24	223
600	915	68.3	692.2	2	812.8	41.3	24	345

Dimensions in mm, for reference. Tolerances and full requirements as per the applicable standard. Confirm against your specification before ordering.

Source: Shiv Shakti Machine Tools Flange Catalogue, edition 2026 (draft), page 9, weights page 15. “–” means the catalogue lists no value.

[CONFIRM: table checked and signed off by the owners (unverified)][CONFIRM: whether the flange thickness includes the raised face]