Fittings

Buttweld Fittings

Nominal pipe size Nps(in)	Outside	L		R		G
	Diameter at bevel	End to end		Redius of fillet		Diameter of lap
	D	MSS SP-43	ASME	A type	B type
1/2	21.3	51	76	3	0.8	35
3/4	26.7	51	76	3	0.8	43
1	33.4	51	102	3	0.8	51
1 1/4	42 2	51	102	5	0.8	64
1 1/2	48.3	51	102	6	0.8	73
2	60.3	64	152	8	0.8	92
2 1/2	73.0	64	152	8	0.8	106
3	88.9	64	152	10	0.8	127
3 1/2	101.6	76	152	10	0.8	140
4	114.3	76	152	11	0.8	157
5	141.3	76	203	11	1.6	185
6	168.3	89	203	13	1.6	218
8	219.1	102	203	13	1.6	270
10	273.0	127	254	13	1.6	324
12	323.8	152	254	13	1.6	381
14	355.6	152	305	13	1.6	413
16	406.4	152	305	13	1.6	470
18	457.0	152	305	13	1.6	533
20	508.0	152	305	13	1.6	584
22	559	152	305	13	-	641
24	610	152	305	13	1.6	692

Remark:

the lap wall thickness ” T” no less than the nominal wall thickness. when the surface is tongue and groove or convex etc. sealing surface, must increase the lap thickness.
the stub ends apply in connection with sch40s or thinner tubes
R conform to the radius from ANSI B16.9 lap under the flange, pls specify the type of the fillet radius when ordering.
if there is any special requirements of L & G, pls specify when ordering.

R is only effective for MSS SP-43 lap joint stub ends

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