Recommendations to Metal Hose Selection

Metal hose overall length tolerance should be + 3% and -1%

For more severe metal hose operating conditions, namely at high temperatures and under conditions of significant dynamic loads, the maximum permissible operating pressure of Pop must be adjusted in accordance with the following formula:

P = P^t=20 x k_t х K_dyn

P

maximum allowable operating pressure at a given temperature and dynamic loads, bar

P^t=20

operating pressure at t = 200°C without significant dynamic loads, in accordance with metal hose parameters*, bar

k_t

adjusting factor for high temperatures in accordance with the table below

K_dyn

adjusting factor for dynamic loads in accordance with the table below

temperature °C
Material	20	50	100	150	200	250	300	350	400	450	500	550
factor kt
AISI 304	1,00	0,88	0,73	0,66	0,60	0,56	0,52	0,50	0,48	0,47	0,46	0,42
AISI 304L	1,00	0,87	0,72	0,65	0,59	0,55	0,51	0,48	0,46	0,45	0,44	0,43
AISI 316L	1,00	0,88	0,74	0,67	0,61	0,57	0,54	0,52	0,50	0,48	0,47	0,47
AISI 321	1,00	0,92	0,83	0,78	0,74	0,71	0,67	0,64	0,62	0,61	0,60	0,59

Load	Factor, Kdyn No vibrations, slow movements	Коэффициент, Kdyn Middle vibrations, frequent movements	Factor, Kdyn Strong vibrations, rhythmic movements
Static, laminar, homogeneous flow	1,00	0,80	0,40
Pulsating, turbulent flow	0,80	0,63	0,32
Part-time, rhythmic slugging	0,32	0,20	On request