P/T Ratings for P355QH1 Flanges

EN 1092-1 flanges made from P355QH1 forgings of EN 10222-4 can be furnished in PN designations from PN 2.5 through PN 400. EN 10222-4 P355QH1, with the steel number of 1.0571, is a weldable fine grain steel with high proof strength. It is categorized into flange material group 8E3 according to EN 1092-1. EN 10222-4 standard is specifying strength values depending on different ranges of product thicknesses. The flange thickness (v_R) related material values shall be used in calculation. For flanges with different v_R, the pressure-temperature rating can be given for each v_R. The pressure-temperature (P/T) rating tables below indicate the maximum allowable pressure (PS) in bar unit at the maximum allowable temperature (TS) in °C unit for P355QH1 flanges manufactured in accordance with EN 1092-1 in different PN designations.

TS, °C	PS, bar (50＜vR≤100)	PS, bar (100＜vR≤150)
RT	2.5	2.5
100	2.5	2.5
150	2.5	2.5
200	2.5	2.5
250	2.5	2.5
300	2.4	2.3
350	2.2	2.1
400	1.9	1.7

*P/T ratings for P355QH1 flanges of PN 2.5.

TS, °C	PS, bar (50＜vR≤100)	PS, bar (100＜vR≤150)
RT	6.0	6.0
100	6.0	6.0
150	6.0	6.0
200	6.0	6.0
250	6.0	6.0
300	5.8	5.6
350	5.4	5.0
400	4.7	4.2

*P/T ratings for P355QH1 flanges of PN 6.

TS, °C	PS, bar (50＜vR≤100)	PS, bar (100＜vR≤150)
RT	10.0	10.0
100	10.0	10.0
150	10.0	10.0
200	10.0	10.0
250	10.0	10.0
300	9.8	9.3
350	9.0	8.4
400	7.9	7.0

*P/T ratings for P355QH1 flanges of PN 10.

TS, °C	PS, bar (50＜vR≤100)	PS, bar (100＜vR≤150)
RT	16.0	16.0
100	16.0	16.0
150	16.0	16.0
200	16.0	16.0
250	16.0	16.0
300	15.6	14.9
350	14.4	13.4
400	12.7	11.2

*P/T ratings for P355QH1 flanges of PN 16.

TS, °C	PS, bar (50＜vR≤100)	PS, bar (100＜vR≤150)
RT	25.0	25.0
100	25.0	25.0
150	25.0	25.0
200	25.0	25.0
250	25.0	25.0
300	24.5	23.3
350	22.6	21.0
400	19.8	17.5

*P/T ratings for P355QH1 flanges of PN 25.

TS, °C	PS, bar (50＜vR≤100)	PS, bar (100＜vR≤150)
RT	40.0	40.0
100	40.0	40.0
150	40.0	40.0
200	40.0	40.0
250	40.0	40.0
300	39.2	37.3
350	36.1	33.7
400	31.8	28.0

*P/T ratings for P355QH1 flanges of PN 40.

TS, °C	PS, bar (50＜vR≤100)	PS, bar (100＜vR≤150)
RT	63.0	63.0
100	63.0	63.0
150	63.0	63.0
200	63.0	63.0
250	63.0	63.0
300	61.8	58.8
350	57.0	53.1
400	50.1	44.1

*P/T ratings for P355QH1 flanges of PN 63.

TS, °C	PS, bar (50＜vR≤100)	PS, bar (100＜vR≤150)
RT	100.0	100.0
100	100.0	100.0
150	100.0	100.0
200	100.0	100.0
250	100.0	100.0
300	98.0	93.3
350	90.4	84.2
400	79.5	70.0

*P/T ratings for P355QH1 flanges of PN 100.

TS, °C	PS, bar (50＜vR≤100)	PS, bar (100＜vR≤150)
RT	160.0	160.0
100	160.0	160.0
150	160.0	160.0
200	160.0	160.0
250	160.0	160.0
300	156.9	149.3
350	144.7	134.8
400	127.2	112.0

*P/T ratings for P355QH1 flanges of PN 160.

TS, °C	PS, bar (50＜vR≤100)	PS, bar (100＜vR≤150)
RT	250.0	250.0
100	250.0	250.0
150	250.0	250.0
200	250.0	250.0
250	250.0	250.0
300	245.2	233.3
350	226.1	210.7
400	198.8	175.0

*P/T ratings for P355QH1 flanges of PN 250.

TS, °C	PS, bar (50＜vR≤100)	PS, bar (100＜vR≤150)
RT	320.0	320.0
100	320.0	320.0
150	320.0	320.0
200	320.0	320.0
250	320.0	320.0
300	313.9	298.6
350	289.5	269.7
400	254.4	224.0

*P/T ratings for P355QH1 flanges of PN 320.

TS, °C	PS, bar (50＜vR≤100)	PS, bar (100＜vR≤150)
RT	400.0	400.0
100	400.0	400.0
150	400.0	400.0
200	400.0	400.0
250	400.0	400.0
300	392.3	373.3
350	361.9	337.1
400	318.0	280.0

*P/T ratings for P355QH1 flanges of PN 400.