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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	259	431
50	19.5	51.7	68.9	103.4	155	259	431
100	17.7	51.5	68.7	103.0	155	258	429
150	15.8	50.2	66.8	100.3	151	251	418
200	13.8	48.6	64.8	97.2	146	243	405
250	12.1	46.3	61.7	92.7	139	232	386
300	10.2	42.9	57.0	85.7	129	214	357
325	9.3	41.4	55.0	82.6	124	207	344
350	8.4	40.0	53.4	80.0	120	200	334
375	7.4	37.8	50.4	75.7	114	189	315
400	6.5	34.7	46.3	69.4	104	174	290
425	5.5	28.8	38.4	57.5	86.3	144	240
450	4.6	23.0	30.7	46.0	69.0	115	192
475	3.7	17.1	22.8	34.2	51.3	85.4	142
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.

Steel Flanges - working pressure vs. class and temperature

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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
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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
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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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Engineering ToolBox, (2003). ANSI B16.5 - Steel Pipe Flanges - Pressure and Temperature Ratings - Group 1.2. [online] Available at: https://www.engineeringtoolbox.com/ansi-flanges-pressure-temperature-d_342.html [Accessed Day Mo. Year].

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