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Malleable Iron Threaded Fittings - Pressure vs. Temperature Rating

ASME/ANSI B16.3 Malleable Iron Threaded Fittings - Pressure and Temperature Ratings.

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This Standard for threaded malleable iron fittings Classes 150, and 300 provides requirements for the following:

(a) pressure-temperature ratings
(b) size and method of designating openings of reducing fittings
(c) marking
(d) materials
(e) dimensions and tolerances
(f) threading
(g) coatings

Pressure-temperature ratings can be found in the table below:

Pressure-Temperature ratings for malleable iron threaded fittings (psig) Load Calculator!
Temperature		Class
		150	300
			1/4 - 1 inches	1 1/4 - 2 inches	2 1/2 - 3 inches
(^oF)	(^oC)		1/4 - 1 inches	1 1/4 - 2 inches	2 1/2 - 3 inches
-20 to 150	-29 to 66	300	2000	1500	1000
200	93	265	1785	1350	910
250	121	225	1575	1200	825
300	149	185	1360	1050	735
350	177	150	1150	900	650
400	204	-	935	750	560
450	232	-	725	600	475
500	260	-	510	450	385
550	288	-	300	300	300

1 psi = 0.0689 bar = 6.89 kPa

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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

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.
BSi - Pipe, Tube and Fittings Standards and Specifications - British standards and specifications for pipe, tube and fittings.
Cast Iron Threaded Pipe Fittings - Working Pressures vs. Temperature - Maximum working pressures for cast iron threaded pipe fittings according ANSI B16.4.
DIN - Pipe, Tube and Fittings Standards and Specifications - Deutsches Institut für Normung - DIN - pipe, tube and fittings standards and specifications.
Pipe Class Ratings vs. Pressure Numbers (PN) - Pressure numbers (PN) vs. flange class designations.

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