Tubing Selection

General Information Tubing Selection Stud Forms Tightening Torques Installation Index

We recommend stainless steel cold drawn fully annealed seamless tubing to DIN 17458 or equivalent and provide tolerances to DIN 2391 part 1
The following tube wall thickness are recommended with stainless steel Bite-Lok® Tube Fittings

TUBE O.D.	Tolerance	Wall Thickness	Weight	Calculated pressure DIN 2413
mm	mm	mm	kg/m	I Bar	III Bar
6	±0.1	1	0.125	372	357
6		1.5	0.168	526	505
6		2	0.200	662	636
6		2.25	0.211	725	696
8	±0.1	1	0.175	347	277
8		1.5	0.244	412	396
8		2	0.300	526	505
8		2.25	0.344	630	604
10	±0.1	1	0.255	294	238
10		1.5	0.319	357	343
10		2	0.401	458	439
10		2.25	0.469	551	529
10		3	0.525	638	612
12	±0.08	1	0.275	245	201
12		1.5	0.394	368	291
12		2	0.501	391	376
12		2.25	0.594	474	455
12		3	0.615	551	529
12		3.5	0.744	624	599
15	±0.08	1.5	0.507	294	238
15		2	0.651	321	309
15		2.25	0.782	391	376
15		3	0.901	458	439
16	±0.08	2	0.701	368	291
16		2.25	0.845	370	355
16		3	0.977	433	416
18	±0.08	1.5	0.620	245	201
18		2	0.801	327	262
18		2.25	0.967	333	320
18		3	1.126	391	376

TUBE O.D.	Tolerance	Wall Thickness	Weight	Calculated pressure DIN 2413
mm	mm	mm	kg/m	I Bar	III Bar
20	±0.08	2.5	1.095	368	291
20		3	1.277	357	343
20		3.5	1.443	408	392
20		4	1.600	458	439
22	±0.08	2	1.002	267	218
22		2.5	1.220	334	267
22		3	1.426	328	315
25	±0.08	2	1.152	235	193
25		2.5	1.408	294	238
25		3	1.635	353	281
25		4	2.092	378	363
25		4.5	2.307	418	402
25		5	2.501	458	439
28	±0.08	2	1.302	210	174
28		2.5	1.594	263	214
28		3	1.874	315	253
28		4	2.402	342	328
28		5	2.876	415	399
30	±0.08	3	2.028	294	238
30		4	2.605	321	309
30		5	3.400	391	376
35	±0.15	2	1.644	168	141
35		2.5	2.018	210	174
35		3	2.392	252	206
35		4	3.086	336	269
35		5	3.742	342	328
35		6	4.351	401	385
38	±0.15	4	3.405	309	249
38		5	4.131	318	305
38		6	4.807	373	358
38		7	5.426	427	410
42	±0.2	3	2.930	210	174
42	±0.2	4	3.798	280	227

Note : Parallel sleeves are recommended where thin walled tube are subject to serve strains.

Calculated pressures to DIN 2413, scope of application I,
for primarily static load conditions at temperatures up to 120ºC.
YIELD POINT/RP1.0 :225N/mm2 (to DIN 17458)
DESIGN FACTOR :1.5
ALLOWANCE FACTOR C1 :10% of wall thickness
ALLOWANCE FACTOR C2 :0 (no allowance for corrosion)
For a diameter ratio of u = OD/ID>1.35,
calculation made to DIN 2413/III and based on a pulsating
fatigue limit of 225 N/mm2.

Calculated pressures to DIN 2413, scope of application III,
for pulsating load conditions at temperatures up to 120ºC.
PULSATING FATIGUE LIMIT :216 N/mm2 (assumed value)
ALLOWANCE FACTOR C1 :10% of wall thickness