PJ Tube Pressure Charts

Pressure Rating Charts

Below burst pressure estimates are based on using Barlow's Formula.

* Barlow’s Formula is expressed as:
Tubing - (2 * MTS * t)/d for estimating theoretical burst pressure.
Pipe - (2 * MTS * t)/D for estimating theoretical burst pressure.

For tubing, outside diameter (D) can be substituted in the calculation for a more conservative value, however the use of inside diameter (d) has been proven valid. The end user should determine the appropriate working pressure and safety factor for the specific application given all relevant operating conditions.

MTS = Minimum tensile strength (psi); MYS = Minimum yield strength (psi); t = Nominal wall thickness (inches); d = Nominal inside diameter (inches);
D = Nominal outside diameter (inches); Working pressure = 1/4 of theoretical burst pressure
Pressure ratings are based on 100° F operating environment only

** Theoretical yield pressure is the point of permanent deformation and calculated by substituting the MYS value in the equation.
*** Collapse pressure estimate shown is per API 5C3 calculation. Formula: (2 * MYS * (D/t - 1)) / (D/t)2

ASTM A312 PIPE PRESSURE RATINGS

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NPS Oustide Diameter	Sched	Actual O.D. (in)	Nom. Wall (in)	MYS (PSI)	MTS (PSI)	Theoretical Burst Pressure * (PSI)	Working Pressure (PSI) 25% of Burst	Theoretical Yield Point ** (PSI)	Collapse Pressure *** (PSI)
1/8"	10	0.405	0.049	30,000	75,000	18,148	4,537	7,259	6,381
1/8"	40	0.405	0.068	30,000	75,000	25,185	6,296	10,074	8,383
1/8"	80	0.405	0.095	30,000	75,000	35,185	8,796	14,074	10,773
1/4"	10	0.540	0.065	30,000	75,000	18,056	4,514	7,222	6,353
1/4"	40	0.540	0.088	30,000	75,000	24,444	6,111	9,778	8,184
1/4"	80	0.540	0.119	30,000	75,000	33,056	8,264	13,222	10,308
3/8"	10	0.678	0.065	30,000	75,000	14,381	3,595	5,752	5,201
3/8"	40	0.678	0.091	30,000	75,000	20,133	5,033	8,053	6,972
3/8"	80	0.678	0.126	30,000	75,000	27,876	6,969	11,150	9,078
1/2"	5	0.840	0.065	30,000	75,000	11,607	2,902	4,643	4,284
1/2"	10	0.840	0.083	30,000	75,000	14,821	3,705	5,929	5,343
1/2"	40	0.840	0.109	30,000	75,000	19,464	4,866	7,786	6,775
1/2"	80	0.840	0.147	30,000	75,000	26,250	6,563	10,500	8,663
3/4"	5	1.050	0.065	30,000	75,000	9,286	2,321	3,714	3,484
3/4"	10	1.050	0.083	30,000	75,000	11,857	2,964	4,743	4,368
3/4"	40	1.050	0.113	30,000	75,000	16,143	4,036	6,457	5,762
3/4"	80	1.050	0.154	30,000	75,000	22,000	5,500	8,800	7,509
1"	5	1.315	0.065	30,000	75,000	7,414	1,854	2,966	2,819
1"	10	1.315	0.109	30,000	75,000	12,433	3,108	4,973	4,561
1"	40	1.315	0.133	30,000	75,000	15,171	3,793	6,068	5,455
1"	80	1.315	0.179	30,000	75,000	20,418	5,105	8,167	7,056
1 1/4"	5	1.660	0.065	30,000	75,000	5,873	1,468	2,349	2,257
1 1/4"	10	1.660	0.109	30,000	75,000	9,849	2,462	3,940	3,681
1 1/4"	40	1.660	0.14	30,000	75,000	12,651	3,163	5,060	4,633
1 1/4"	80	1.660	0.191	30,000	75,000	17,259	4,315	6,904	6,109
1 1/2"	5	1.900	0.065	30,000	75,000	5,132	1,283	2,053	1,982
1 1/2"	10	1.900	0.109	30,000	75,000	8,605	2,151	3,442	3,245
1 1/2"	40	1.900	0.145	30,000	75,000	11,447	2,862	4,579	4,230
1 1/2"	80	1.900	0.2	30,000	75,000	15,789	3,947	6,316	5,651
2"	5	2.375	0.065	30,000	75,000	4,105	1,026	1,642	1,597
2"	10	2.375	0.109	30,000	75,000	6,884	1,721	2,754	2,627
2"	40	2.375	0.154	30,000	75,000	9,726	2,432	3,891	3,638
2"	80	2.375	0.218	30,000	75,000	13,768	3,442	5,507	5,002

TUBE PRESSURE RATINGS FOR ASTM - A269-A249 - 304L-316L

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OD inches	Ave. Wall inches	Min Yield Strength (PSI)	Min Tensile Strength (PSI)	Theoretical Burst Pressure * (PSI)	Working Pressure (PSI) 25% of Burst	Theoretical Yield Point ** (PSI)	Collapse Pressure *** (PSI)
0.25	0.020	30,000	75,000	14,286	3,571	5,714	4,416
0.25	0.028	30,000	75,000	21,649	5,412	8,660	5,967
0.25	0.035	30,000	75,000	29,167	7,292	11,667	7,224
0.25	0.049	30,000	75,000	48,355	12,089	19,342	9,455
0.25	0.065	30,000	75,000	81,250	20,313	32,500	11,544
0.375	0.020	30,000	75,000	8,955	2,239	3,582	3,029
0.375	0.028	30,000	75,000	13,166	3,292	5,266	4,145
0.375	0.035	30,000	75,000	17,213	4,303	6,885	5,077
0.375	0.049	30,000	75,000	26,534	6,634	10,614	6,816
0.375	0.065	30,000	75,000	39,796	9,949	15,918	8,597
0.5	0.020	30,000	75,000	6,522	1,630	2,609	2,304
0.5	0.028	30,000	75,000	9,459	2,365	3,784	3,172
0.5	0.035	30,000	75,000	12,209	3,052	4,884	3,906
0.5	0.049	30,000	75,000	18,284	4,571	7,313	5,304
0.5	0.065	30,000	75,000	26,351	6,588	10,541	6,786
0.5	0.083	30,000	75,000	37,275	9,319	14,910	8,307
0.625	0.020	30,000	75,000	5,128	1,282	2,051	1,859
0.625	0.028	30,000	75,000	7,381	1,845	2,953	2,568
0.625	0.035	30,000	75,000	9,459	2,365	3,784	3,172
0.625	0.049	30,000	75,000	13,947	3,487	5,579	4,335
0.625	0.065	30,000	75,000	19,697	4,924	7,879	5,591
0.625	0.083	30,000	75,000	27,124	6,781	10,850	6,910
0.625	0.095	30,000	75,000	32,759	8,190	13,103	7,734
0.625	0.109	30,000	75,000	40,172	10,043	16,069	8,639
0.75	0.028	30,000	75,000	6,052	1,513	2,421	2,156
0.75	0.035	30,000	75,000	7,721	1,930	3,088	2,669
0.75	0.049	30,000	75,000	11,273	2,818	4,509	3,664
0.75	0.065	30,000	75,000	15,726	3,931	6,290	4,749
0.75	0.083	30,000	75,000	21,318	5,330	8,527	5,905
0.75	0.095	30,000	75,000	25,446	6,362	10,179	6,637
0.75	0.109	30,000	75,000	30,733	7,683	12,293	7,453
0.75	0.120	30,000	75,000	35,294	8,824	14,118	8,064
0.875	0.020	30,000	75,000	3,593	898	1,437	1,340
0.875	0.028	30,000	75,000	5,128	1,282	2,051	1,859
0.875	0.035	30,000	75,000	6,522	1,630	2,609	2,304
0.875	0.049	30,000	75,000	9,459	2,365	3,784	3,172
0.875	0.065	30,000	75,000	13,087	3,272	5,235	4,126
0.875	0.083	30,000	75,000	17,560	4,390	7,024	5,152
0.875	0.095	30,000	75,000	20,803	5,201	8,321	5,807
0.875	0.109	30,000	75,000	24,886	6,221	9,954	6,543
0.875	0.120	30,000	75,000	28,346	7,087	11,339	7,100
1	0.028	30,000	75,000	4,449	1,112	1,780	1,633
1	0.035	30,000	75,000	5,645	1,411	2,258	2,027
1	0.049	30,000	75,000	8,149	2,037	3,259	2,796
1	0.065	30,000	75,000	11,207	2,802	4,483	3,647
1	0.083	30,000	75,000	14,928	3,732	5,971	4,567
1	0.095	30,000	75,000	17,593	4,398	7,037	5,159
1	0.109	30,000	75,000	20,908	5,227	8,363	5,827
1	0.120	30,000	75,000	23,684	5,921	9,474	6,336
1	0.134	30,000	75,000	27,459	6,865	10,984	6,963
1.25	0.035	30,000	75,000	4,449	1,112	1,780	1,633
1.25	0.049	30,000	75,000	6,380	1,595	2,552	2,260
1.25	0.065	30,000	75,000	8,705	2,176	3,482	2,958
1.25	0.083	30,000	75,000	11,485	2,871	4,594	3,719
1.25	0.095	30,000	75,000	13,443	3,361	5,377	4,213
1.25	0.109	30,000	75,000	15,843	3,961	6,337	4,776
1.25	0.120	30,000	75,000	17,822	4,455	7,129	5,207
1.25	0.134	30,000	75,000	20,468	5,117	8,187	5,742
1.5	0.035	30,000	75,000	3,671	918	1,469	1,367
1.5	0.049	30,000	75,000	5,243	1,311	2,097	1,896
1.5	0.065	30,000	75,000	7,117	1,779	2,847	2,487
1.5	0.083	30,000	75,000	9,333	2,333	3,733	3,136
1.5	0.095	30,000	75,000	10,878	2,719	4,351	3,559
1.5	0.109	30,000	75,000	12,754	3,188	5,101	4,043
1.5	0.120	30,000	75,000	14,286	3,571	5,714	4,416
1.5	0.134	30,000	75,000	16,315	4,079	6,526	4,881
1.5	0.148	30,000	75,000	18,439	4,610	7,375	5,336
1.75	0.035	30,000	75,000	3,125	781	1,250	1,176
1.75	0.049	30,000	75,000	3,864	966	1,546	1,434
1.75	0.065	30,000	75,000	6,019	1,505	2,407	2,146
1.75	0.083	30,000	75,000	7,860	1,965	3,144	2,711
1.75	0.095	30,000	75,000	9,135	2,284	3,654	3,080
1.75	0.109	30,000	75,000	10,672	2,668	4,269	3,504
1.75	0.120	30,000	75,000	11,921	2,980	4,768	3,832
1.75	0.134	30,000	75,000	13,563	3,391	5,425	4,242
1.75	0.148	30,000	75,000	15,268	3,817	6,107	4,645
1.75	0.165	30,000	75,000	17,430	4,357	6,972	5,124
2	0.035	30,000	75,000	2,720	680	1,088	1,032
2	0.049	30,000	75,000	3,864	966	1,546	1,434
2	0.065	30,000	75,000	5,214	1,303	2,086	1,887
2	0.083	30,000	75,000	6,788	1,697	2,715	2,387
2	0.095	30,000	75,000	7,873	1,968	3,149	2,715
2	0.109	30,000	75,000	9,175	2,294	3,670	3,092
2	0.120	30,000	75,000	10,227	2,557	4,091	3,384
2	0.134	30,000	75,000	11,605	2,901	4,642	3,751
2	0.148	30,000	75,000	13,028	3,257	5,211	4,111
2	0.165	30,000	75,000	14,820	3,705	5,928	4,542

Rated Internal Working Pressure for Copper Tube: ACR (Air Conditioning and Refrigeration Filed Service)

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Tube Size (OD)	S=6000 psi 100 F	S=5100 psi 150 F	S=4900 psi 200F	S=4800 psi 250F	S=4700 psi 300 F	S=4000 psi 350F	S=3000 psi 400F
0.1250	3074	2613	2510	2459	2408	2049	1537
0.1875	1935	1645	1581	1548	1516	1290	968
0.2500	1406	1195	1148	1125	1102	938	703
0.3125	1197	1017	977	957	937	798	598
0.3750	984	836	803	787	770	656	492
0.5000	727	618	594	581	569	485	363
0.6250	618	525	504	494	484	412	309
0.7500	511	435	417	409	400	341	256
0.8750	582	495	475	466	456	388	291
1.1250	494	420	404	395	387	330	247
1.3750	439	373	358	351	344	293	219
1.6250	408	347	334	327	320	272	204

Pressure Rating for Seamless Stainless Coils ASTM A269 316/316L

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OD (Inches)	Ave. Wall (Inches)	Min Yield Strenght (PSI)	Min Tensile Strenght (PSI)	Theroetical Burst Pressure (PSI)
0.125	0.035	30,000	75,000	95,455
0.25	0.035	30,000	75,000	29,167
0.25	0.035	30,000	75,000	29,167
0.25	0.049	30,000	75,000	48,355
0.25	0.065	30,000	75,000	81,250
0.375	0.035	30,000	75,000	17,213
0.375	0.035	30,000	75,000	17,213
0.375	0.049	30,000	75,000	26,534
0.375	0.065	30,000	75,000	39,796
0.5	0.035	30,000	75,000	12,209
0.5	0.049	30,000	75,000	18,284
0.5	0.049	30,000	75,000	18,284
0.5	0.065	30,000	75,000	26,351
0.75	0.049	30,000	75,000	11,273
0.75	0.065	30,000	75,000	15,726
6mm	1mm	30,000	75,000	37,500
8mm	1mm	30,000	75,000	25,000
10mm	1mm	30,000	75,000	18,750
12mm	1mm	30,000	75,000	15,000

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Pressure Charts

Pressure Rating Charts

Below burst pressure estimates are based on using Barlow's Formula.

ASTM A312 PIPE PRESSURE RATINGS

TUBE PRESSURE RATINGS FOR ASTM - A269-A249 - 304L-316L

Rated Internal Working Pressure for Copper Tube: ACR (Air Conditioning and Refrigeration Filed Service)

Pressure Rating for Seamless Stainless Coils ASTM A269 316/316L