p/T Ratings for P250GH Flanges (EN 1092-1)

EN 1092-1 flanges, either made from EN 10273 P250GH hot rolled bars or EN 10222-2 P250GH forgings, are classified into material group 3E0. The pressure-temperature ratings (p/T ratings) for P250GH indicate the maximum allowable pressure (M.A.S in bar unit) at maximum allowable temperature (Temp. in °C unit) for various PN designations of P250GH flanges. The p/T ratings are dependent on the actual flange thickness (v_R in mm unit).

Temp. °C	M.A.S for vR≤50 bar	M.A.S, for 50＜vR≤150 bar
RT	2.5	2.5
100	2.3	2.1
150	2.2	2.0
200	2.0	1.9
250	1.9	1.7
300	1.7	1.6
350	1.6	1.5
400	1.4	1.4
450	0.8	0.8

*The p/T ratings for PN 2.5 P250GH flanges.

Temp. °C	M.A.S for vR≤50 bar	M.A.S, for 50＜vR≤150 bar
RT	6.0	6.0
100	5.5	5.1
150	5.2	5.0
200	5.0	4.6
250	4.5	4.2
300	4.1	3.8
350	3.8	3.6
400	3.5	3.4
450	1.9	1.9

*The p/T ratings for PN 6 P250GH flanges.

Temp. °C	M.A.S for vR≤50 bar	M.A.S, for 50＜vR≤150 bar
RT	10.0	10.0
100	9.2	8.5
150	8.8	8.3
200	8.3	7.7
250	7.6	7.0
300	6.9	6.4
350	6.4	6.0
400	5.9	5.7
450	3.2	3.2

*The p/T ratings for PN 10 P250GH flanges.

Temp. °C	M.A.S for vR≤50 bar	M.A.S, for 50＜vR≤150 bar
RT	16.0	16.0
100	14.8	13.7
150	14.0	13.3
200	13.3	12.4
250	12.1	11.3
300	11.0	10.2
350	10.2	9.6
400	9.5	9.1
450	5.2	5.2

*The p/T ratings for PN 16 P250GH flanges.

Temp. °C	M.A.S for vR≤50 bar	M.A.S, for 50＜vR≤150 bar
RT	25.0	25.0
100	23.2	21.4
150	22.0	20.8
200	20.8	19.4
250	19.0	17.7
300	17.2	16.0
350	16.0	15.1
400	14.8	14.2
450	8.2	8.2

*The p/T ratings for PN 25 P250GH flanges.

Temp. °C	M.A.S for vR≤50 bar	M.A.S, for 50＜vR≤150 bar
RT	40.0	40.0
100	37.1	34.2
150	35.2	33.3
200	33.3	31.0
250	30.4	28.3
300	27.6	25.7
350	25.7	24.1
400	23.8	22.8
450	13.1	13.1

*The p/T ratings for PN 40 P250GH flanges.

Temp. °C	M.A.S for vR≤50 bar	M.A.S, for 50＜vR≤150 bar
RT	63.0	63.0
100	58.5	54.0
150	55.5	52.5
200	52.5	48.9
250	48.0	44.7
300	43.5	40.5
350	40.5	38.1
400	37.5	36.0
450	20.7	20.7

*The p/T ratings for PN 63 P250GH flanges.

Temp. °C	M.A.S for vR≤50 bar	M.A.S, for 50＜vR≤150 bar
RT	100.0	100.0
100	92.8	85.7
150	88.0	83.3
200	83.3	77.6
250	76.1	70.9
300	69.0	64.2
350	64.2	60.4
400	59.5	57.1
450	32.8	32.8

*The p/T ratings for PN 100 P250GH flanges.

Temp. °C	M.A.S for vR≤50 bar	M.A.S, for 50＜vR≤150 bar
RT	160.0	160.0
100	148.5	137.1
150	140.9	133.3
200	133.3	124.1
250	121.9	113.5
300	110.4	102.8
350	102.8	96.7
400	95.2	91.4
450	52.5	52.5

*The p/T ratings for PN 160 P250GH flanges.

Temp. °C	M.A.S for vR≤50 bar	M.A.S, for 50＜vR≤150 bar
RT	250.0	250.0
100	232.1	214.2
150	220.2	208.3
200	208.3	194.0
250	190.4	177.3
300	172.6	160.7
350	160.7	151.1
400	148.8	142.8
450	82.1	82.1

*The p/T ratings for PN 250 P250GH flanges.

Temp. °C	M.A.S for vR≤50 bar	M.A.S, for 50＜vR≤150 bar
RT	320.0	320.0
100	297.1	274.2
150	281.9	266.6
200	266.6	248.3
250	243.8	227.0
300	220.9	205.7
350	205.7	193.5
400	190.4	182.8
450	105.1	105.1

*The p/T ratings for PN 320 P250GH flanges.

Temp. °C	M.A.S for vR≤50 bar	M.A.S, for 50＜vR≤150 bar
RT	400.0	400.0
100	371.4	342.8
150	352.3	333.3
200	333.3	310.4
250	304.7	283.8
300	276.1	257.1
350	257.1	241.9
400	238.0	228.5
450	131.4	131.4

*The p/T ratings for PN 400 P250GH flanges.