Pressure-Temperature Ratings For Flanges

Material Group	Materials ₄(Spec-Grade)	See Notes
1.1	A105, A515-70	a,h
	A350-LF2, A537- C 1.1	d
	A516-70	a,g
1.2	A203-B, A203-E	a,h
1.3	A203-A, A203-D
1.3	A515-65, A516-65	a
1.4	A515-60	a,h
	A516-60	a,g
	A350-LF1	d
1.5	A182-F1	b
1.5	A204-A, A204-B	b
1.7	A182-F2	h
1.7	A204-C	g
1.9	A182-F11, A182-F12	c
1.9	A387-11C1.2	c
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Material Group	Materials ₄(Spec-Grade)	See Notes
1.10	A182-F22	c
1.10	A387-22C1.2	c
1.13	A182-F5, A182-F5a	-
1.14	A182-F-9	-
2.1	A182-F304	-
	A182-F304H	-
	A204-304	-
	A204-304H	-
2.2	A182-F316, A182-F316H	-
	A240-316	-
	A240-316H	-
	A204-317	-
2.3	A182-F304L, A240-304L	f
2.3	A182-F316H, A204-316L	g
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Material Group	Materials ₄(Spec-Grade)	See Notes
2.4	A182-F321, A240-321	h
	A182-F321H, A240-321H	-
2.5	A182-F347, A240-347	h
	A182-F347H, A240-347H	-
	A182-F348, A240-348	h
	A182-F348H	-
	A240-F348H	-
2.6	A240-309S	-
2.4	A182-F310, A240-310S	k
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Notes:

(a) Permissible but not recommended for prolonged use above 800ºF

(b) Permissible but not recommended for prolonged use above 850ºF

(d) Not to be used over 650ºF

(f) Not to be used over 800ºF

(g) Not to be used over 850ºF

(h) Not to be used over 1000ºF

(i) Not to be used over 1050ºF

(j) Not to be used over 1100ºF

(k) For service temperature 1050ºF and above, assurance must be provided that grain size is not finer than ASTM No. 6.