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ANSI B16.5 - Steel Pipe Flanges - Pressure and Temperature Ratings - Group 1.2

Pressure (psig) and temperature ratings for steel pipe flanges and flanged fittings

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Pressure (psig) and temperature ratings for steel pipe flanges and flanged fittings according the American National Standard ANSI B16.5 - 1988 Group 1.2:

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Working Pressure (bar)
Temperature (°C)	Class
Temperature (°C)	150	300	400	600	900	1500	2500
-29 - 38	19.8	51.7	68.9	103.4	155.1	258.6	430.9
50	19.5	51.7	68.9	103.4	155.1	258.6	430.9
100	17.7	51.5	68.7	103.0	154.6	257.6	429.4
150	15.8	50.2	66.8	100.3	150.5	250.8	418.1
200	13.8	48.6	64.8	97.2	145.8	243.2	405.4
250	12.1	46.3	61.7	92.7	139.0	231.8	386.2
300	10.2	42.9	57.0	85.7	128.6	214.4	357.1
325	9.3	41.4	55.0	82.6	124.0	206.6	344.3
350	8.4	40.0	53.4	80.0	120.1	200.1	333.5
375	7.4	37.8	50.4	75.7	113.5	189.2	315.3
400	6.5	34.7	46.3	69.4	104.2	173.6	289.7
425	5.5	28.8	38.4	57.5	86.3	143.8	239.7
450	4.6	23.0	30.7	46.0	69.0	115.0	191.7
475	3.7	17.1	22.8	34.2	51.3	85.4	142.4
500	2.8	11.6	15.4	23.2	34.7	57.9	96.5
538	1.4	5.9	7.9	11.8	17.7	29.5	49.2

The values in this table apply to materials Group 1.2

Pressure Ratings Group 1.1

For other Material Groups the Pressure-Temperature Ratings are different. Most carbon steels are only acceptable for temperatures below 800 F.

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Related Topics

Pressure Ratings - Pressure ratings of pipes and tubes and their fittings - carbon steel , stainless steel, plastic, copper and more

Related Documents

ANSI - American National Standards Institute - ANSI provides a forum for development of American national standards
ANSI B16.5 - Steel Pipe Flanges - Pressure and Temperature Ratings - Group 1.2 - Pressure (psig) and temperature ratings for steel pipe flanges and flanged fittings
ASME - American Society of Mechanical Engineers - ASME is one of the leading organizations in the world developing codes and standards
ASME B31 - Pressure Piping - A survey of one of the most important pressure pipe codes - ASME B31, earlier known as ANSI B31
ASME B31.9 - Working Pressure and Temperature Limits - The working pressure and temperature limits of ASME Code B31.9 - Building Services Piping
ASME/ANSI B16 Standards for Pipes and Fittings - The ASME B16 standards covers pipes and fittings in cast iron , cast bronze, wrought copper and steel
ASME/ANSI B16.5 - Flanges and Bolt Dimensions Class 150 to 2500 - Diameters and bolt circles for standard ASME B16.5 flanges - 1/4 to 24 inches - Class 150 to 2500
Bronze Flanges - ASME/ANSI 150 lb - Flange diameters, thickness, bolt circles, numbers and diameters of bolts for ASME/ANSI B16.15 - Cast Bronze Threaded Fittings - 150 lb Bronze flanges with plain faces
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Carbon and Stainless Steel Flanges - ASME/ANSI Class 150 - ASME/ANSI B16.5-1996 Pipe Flanges and Flanged Fittings - Class 150 Flanges - outside and inside diameters, bolt circles, numbers and diameters of bolts
Carbon Steel Flanges - Pressure and Temperature Ratings - Group 1.1 - Carbon Steel - Maximum temperature and pressure ratings of flanges conforming dimensions ASME B16.5 and materials specification ASTM A-105
Cast Iron Flanges - ASME/ANSI Class 125 - ASME/ANSI B16.1 Cast Iron Pipe Flanges and Flanged Fittings - Class 125 Flanges - outside and inside diameters, bolt circles, numbers and diameters of bolts
Flanges - API vs. ASME/ANSI - API and ASME/ANSI flanges - comparing dimensions and pressure ratings
Flanges - Hydrostatic Test Pressure - Flanged fittings and required hydrostatic test pressure
Pressure and Temperature Ratings ASTM A-53, A-106 and API 5L Grade B Carbon Steel Pipes - Metric Units - Pressure (kPa) and temperature (^oC) ratings of ASTM A-106, API 5L and ASTM A-53 Seamless Carbon Steel Pipes - temperatures ranging -29 ^oC - 450 ^oC
Pressure and Temperature Ratings of A-53 B, A-106 B, A333, A334 and API 5L Carbon Steel Pipes - Imperial Units - Pressure (psig) and temperature (deg F) ratings for A-53 B and A-106 B, A333, A334 and API 5L carbon steel pipes - temperatures ranging 100 ^oF - 700 ^oF
Steel Pipes - Temperature Derating - Temperature derating factor for steel pipes
Steel Tubes - Working Pressures - Normal maximum working pressures for steel tubes - in psi (lb/in²) and kPa (kN/m²)
Surge - Water Hammer - Rapidly closing or opening valves - or starting stopping pumps - may cause pressure transients in pipelines known as surge or water hammers

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