Type: Spectacle Blind Flange
Material: ASTM A182 F304
Size: 4 Inch (DN 100)
Pressure Class: 300 Lbs
Standard: ANSI B16.48
Surface Treatment: Without coating

Chemical Composition and Mechanical Property for 304
Steel Grade	Chemical Composition									Mechanical Performance
	C(Max)	Si(Max)	Mn(Max)	P(Max)	S(Max)	Ni	Cr	N(Max)	Mo	Tensile Strength (Min)	Yield Strength (Min)
										Mpa	Mpa
304	0.08	0.75	2.00	0.045	0.03	8.0–10.5	18.0–20.0	0.1	/	515	205

Spectacle Blind Flanges Class 300

NPS	Outside Ø A	Inside Ø B	Centerline C	Thickness t	Web Width W
1/2	51	16	65	6.4	38
3/4	64	21	80	6.4	38
1	70	27	90	6.4	38
1.1/4	79	42	100	6.4	38
1.1/2	92	48	115	6.4	38
2	108	61	125	9.7	51
2.1/2	127	73	150	9.7	51
3	146	89	170	9.7	64
3.1/2	162	102	185	12.7	64
4	178	114	200	12.7	64
5	213	141	235	15.7	76
6	248	168	270	15.7	76
8	305	219	330	22.4	76
10	359	273	385	25.4	102
12	419	324	450	28.4	102
14	483	356	515	31.8	108
16	536	406	570	38.1	108
18	594	457	630	41.1	114
20	651	508	685	44.5	121
24	772	610	810	50.8	140
NPS	Outside Ø A	Inside Ø B	Centerline C	Thickness t	Web Width W

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ANSI B16.48 ASTM A182 F304 Spectacle Blind Flange 300 LB 4 Inch

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Spectacle Blind Flanges Class 300

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