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Tube Performance Data

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Performance Data

Tube

Stainless steel	Copper
ASTM A269	ASTM B68
ASTM A213	ASTM B75
ASTM A249	ASTM B88

Common Tube Materials and Sizes

CM TECH’s standard tubing materials are 304/304L
semi-seamless and 316/316L seamless stainless steel,
type 1220 copper tube. In case of using other materials,
available upon requested.

- CM TECH Tubing bundle options

Material Thickness)	Size
Material Thickness)	1/4	3/8	1/2
304/304L
0.035	O	O	O
0.049	O	O	O
316/316L
0.035	O	O	O
0.049	O	O	O
Copper
0.030	O
0.032		O
0.049			O
PFA Teflon
0.030	O	O
0.060			O

- Size & Bend Radius.

Tube O.D	Nominal Bundle O.D(in)	Minimum bend radius(in)	Run length(m)
1/4	1.5	7.0	250~300
3/8	1.6	7.0	250~300
1/2	1.8	8.0	250~300
3/4	2.0	10.0	250~300

- WORKING PRESSURE @ 200℃ (Unit:PSI)

TUBE WALL THICKNESS
Tube O.D	304 welded stainless steel		316 seamless stainless steel		#1220 copper
Th’k	0.035	0.049	0.035	0.049	0.035	0.049
1/4	4222	6164	4967	7252
3/8	2740	3942	3224	4637	556	861
1/2	2154	3080	2543	3624	410	600
3/4	1416	2010	1666	2565		390

- Pressure Rating

Type	Tube Size(inch)		Tubing Pressure Rating(PSI) vs. Temperature
	O.D.	Wall Th’k	100℉	37.7℃	200℉	93.3℃	300	148.8	400	204.4	500	260	600	315.5
	O.D.	Wall Th’k	Burst Pressure	Operation Pressure	Burst Pressure	Operation Pressure	Burst Pressure	Operation Pressure	Burst Pressure	Operation Pressure	Burst Pressure	Operation Pressure	Burst Pressure	Operation Pressure
Copper	1/4	0.030	7230	1450	6630	1330	5730	1150	3620	730
	3/8	0.032	5040	1010	4620	930	3990	800	2520	510
	1/2	0.035	4050	810	3710	750	3200	640	2020	410
	1/2	0.049	5900	1180	5400	1080	4700	940	2950	590
304(L) welded	1/4	0.030	20100	5025	20100	5025	18200	4550	16900	4225	16300	4075	15900	3975
	3/8	0.032	12800	3200	12800	3200	11600	2900	10800	2700	10400	2600	10200	2550
	1/2	0.035	9400	2350	9400	2350	8500	2125	7900	1975	7600	1900	7500	1875
	1/2	0.049	13500	3375	13500	3375	12300	3075	11400	2850	10900	2725	10700	2675
316(L) Seamless	1/4	0.030	23650	5910	23645	5910	23300	5825	19880	4970	19180	4795	18700	4675
	3/8	0.032	15060	3765	15060	3765	13640	3410	12700	3175	12240	3060	12000	3000
	1/2	0.035	11060	2765	11060	2765	10000	2500	9300	2325	5940	2235	8820	2205
	1/2	0.049	15880	3970	15880	3970	14480	3620	13420	3355	12820	3205	12580	3145
316(L) Welded	1/4	0.030	20100	5025	20100	5025	18200	4550	16900	4225	16300	4075	15900	3975
	3/8	0.032	12800	3200	12800	3200	11600	2900	10800	2700	10400	2600	10200	2550
	1/2	0.035	9400	2350	9400	2350	8500	2125	7900	1975	7600	1900	7500	1875
	1/2	0.049	13500	3375	13500	3375	12300	3075	11400	2850	10900	2725	10700	2675

*Reference:

Pressure data for metal tubing is taken from American National Standard Code for Pressure Piping,
“Power Piping, ANSI B31.1 – B30-1993AEdition.” The values stated for operating (opr.)
pressure are the maximum internal service pressure determined using the calculated burst pressure
and an associated design factor. The equations and stress values were extracted from the above listed document.

Burst Pressure = K d-0.8t

Where K=efficiency of weld (0.85);
           (K=1 for seamless)
           s=tensile strength of stainless steel (PSI)
           D=tube O.D. in inches
           t=tube wall thickness in inches

the operating pressure is taken to be 25% of the burst pressure, which is a 4 to design factor.

- Performance Characteristics.

Steam Pressure & Temperature			50 PSIG @ 150℃		80 PSIG @ 165℃		120 PSIG @ 175℃		150 PSIG @ 185℃		230 PSIG @ 205℃
Ambient Temperature			27℃		27℃		27℃		27℃		27℃
Tube O.D.(in)	Bundle O.D. (in)	Insulation Th’k(in)	Heat Loss	Jacket Temp	Heat Loss	Jacket Temp	Heat Loss	Jacket Temp	Heat Loss	Jacket Temp	Heat Loss	Jacket Temp
1/4	0.81	0.20	28.5	120	31.9	125	35.3	130	37.4	133	41.8	139
3/8	1.015	0.24	33.6	118	37.6	122	41.6	127	44.1	130	49.3	136
1/2	1.14	0.24	40.4	121	45.3	125	50.1	130	53.0	133	59.3	140

- HEAT LOSS is measured in Btu/hr., per linear meter of tubing.

Tube Size(in)		Insulation th’k(in)	Jacket Th’k(in)	Bundle O.D.(in)	Heat gain / loss rates & R-factor @ 20℃ ambient temperature
Tube Size(in)					Process,LN2=-195℃		Process, Liquid CO2=-56℃		Process, Steam=204℃
O.D.	W.T				Heat gain Rate (BTU/hr)ft	R=factor,℉ (BTU/hr)ft.	Heat gain Rate (BTU/hr)ft	R=factor,℉ (BTU/hr)ft.	Heat gain Rate (BTU/hr)ft	R=factor,℉ (BTU/hr)ft.
1/4	0.030	0.36	0.08	1.13	18.3	21.3	10.7	13.0	30.9	10.7
3/8	0.032	0.36	0.08	1.26	23.0	17.0	13.4	10.4	38.5	8.6
1/2	0.035	0.36	0.08	1.38	27.5	14.2	16.0	8.8	45.7	7.2
1/4	0.035	0.36	0.08	1.13	18.3	21.3	10.7	13.0	30.9	10.7
3/8	0.035	0.36	0.08	1.26	23.0	17.0	13.4	10.4	38.5	8.6
1/2	0.035	0.36	0.08	1.38	27.5	14.2	16.0	8.8	45.7	7.2
1/4	0.030	0.72	0.08	1.85	13.5	29.0	8.1	17.3	23.5	14.0
3/8	0.032	0.72	0.08	1.98	16.3	24.0	9.7	14.4	28.3	11.7
1/2	0.035	0.72	0.08	2.10	18.9	20.7	11.3	12.4	32.8	10.1
1/4	0.035	0.72	0.08	1.85	13.5	29.0	8.1	17.3	23.5	14.0
3/8	0.035	0.72	0.08	1.98	16.3	24.0	9.7	14.4	28.3	11.7
1/2	0.035	0.72	0.08	2.10	18.9	20.7	11.3	12.4	32.8	10.1
1/4	0.030	0.96	0.08	2.33	12.0	32.5	7.2	19.3	21.2	15.6
3/8	0.032	0.96	0.08	2.46	14.3	27.3	8.6	16.3	25.1	13.1
1/2	0.035	0.96	0.08	2.58	16.4	23.8	9.9	14.2	28.8	11.5
1/4	0.035	0.96	0.08	2.33	12.0	32.5	7.2	19.3	21.2	15.6
3/8	0.035	0.96	0.08	2.46	14.3	27.3	8.6	16.3	25.1	13.1
1/2	0.035	0.96	0.08	2.85	16.4	23.8	9.9	14.2	28.8	11.5