Copper – Internal Working Pressure Type L*

Calculated Rated Internal Working Pressure for Copper Tube: Type L*

Nominal or standard size, in inches	Annealed***
	S= 6000 psi 100F	S= 5100 psi 150F	S= 4900 psi 200F	S= 4800 psi 250F
1/4	912	775	745	729
3/8	779	662	636	623
1/2	722	613	589	577
5/8	631	537	516	505
3/4	582	495	475	466
1	494	420	404	395
1-1/4	439	373	358	351
1-1/2	408	347	334	327
2	364	309	297	291
2-1/2	336	285	274	269
3	317	270	259	254
3-1/2	304	258	248	243
4	293	249	240	235
5	269	229	220	215
6	251	213	205	201
8	270	230	221	216
10	271	231	222	217
12	253	215	207	203

Nominal or standard size, in inches	Annealed***
	S= 4700 psi 300F	S= 4000 psi 350F	S= 3000 psi 400F
1/4	714	608	456
3/8	610	519	389
1/2	565	481	361
5/8	495	421	316
3/4	456	388	291
1	387	330	247
1-1/4	344	293	219
1-1/2	320	272	204
2	285	242	182
2-1/2	263	224	168
3	248	211	159
3-1/2	238	202	152
4	230	196	147
5	211	179	135
6	196	167	125
8	212	180	135
10	212	181	136
12	199	169	127

Nominal or standard size, in inches	Drawn**
	S= 10,300 psi 100F	S= 10,300 psi 150F	S= 10,300 psi 200F	S= 10,300 psi 250F
1/4	1569	1569	1569	1569
3/8	1341	1341	1341	1341
1/2	1242	1242	1242	1242
5/8	1086	1086	1086	1086
3/4	1002	1002	1002	1002
1	850	850	850	850
1-1/4	755	755	755	755
1-1/2	702	702	702	702
2	625	625	625	625
2-1/2	577	577	577	577
3	545	545	545	545
3-1/2	522	522	522	522
4	504	504	504	504
5	462	462	462	462
6	431	431	431	431
8	464	464	464	464
10	466	466	466	466
12	435	435	435	435

Nominal or standard size, in inches	Drawn**
	S= 10,000 psi 300F	S= 9,700 psi 350F	S= 9,400 psi 400F
1/4	1524	1478	1432
3/8	1302	1263	1224
1/2	1206	1169	1133
5/8	1055	1023	991
3/4	972	943	914
1	825	801	776
1-1/4	733	711	689
1-1/2	682	661	641
2	607	589	570
2-1/2	560	544	527
3	529	513	497
3-1/2	506	491	476
4	489	474	460
5	449	435	422
6	418	406	393
8	451	437	424
10	452	439	425
12	423	410	397

* Based on maximum allowable stress in tension (psi) for the indicated temperatures (F).

** When brazing or welding is used to join drawn tube, the corresponding annealed rating must be used.

*** Types M and DWV are not normally available in the annealed temper. Shaded values are provided for guidance when drawn temper tube is brazed or welded. For more information, see Pressure Ratings and Burst Strength.