Group 2.3: Austenitic SS L-Grade

ASME B16.5-2020 Pressure-Temperature Ratings

Pressure Ratings > Flange > Group 2.3 — Austenitic SS L-Grade

Units

Group 2.3: Austenitic SS L-Grade

Materials: A182 F304L/F316L/F317L, A240-304L/316L

Pressure-Temperature Curve

Class 150
Class 1500
Class 2500
Class 300
Class 400
Class 600
Class 900

Interpolation Calculator

Calculate allowable working pressure at any intermediate temperature by linear interpolation.

Class

Temperature

Group 2.3 Pressure-Temperature Ratings (psig)

Temp (°F)	Class 150	Class 300	Class 400	Class 600	Class 900	Class 1500	Class 2500
−20	230	600	800	1,200	1,800	3,000	5,000
100	230	600	800	1,200	1,800	3,000	5,000
200	195	510	680	1,020	1,535	2,555	4,260
300	175	455	610	910	1,370	2,280	3,800
400	160	420	560	840	1,260	2,100	3,500
500	150	395	525	785	1,180	1,970	3,280
600	140	370	495	745	1,115	1,860	3,100
650	125	365	485	730	1,095	1,825	3,040
700	110	360	480	720	1,080	1,800	3,000
750	95	355	470	705	1,060	1,765	2,940
800	80	345	460	690	1,035	1,730	2,880
850	65	340	450	675	1,015	1,690	2,820

Matching Pipe Materials — MAWP Calculators

A312 TP304L

ASTM A312 TP304L SS Pipe Smls 18Cr-8Ni

A312 TP316L

ASTM A312 TP316L SS Pipe Smls 16Cr-12Ni-2Mo

Disclaimer: This chart is for guidance only. The data is from ASME B16.5-2020 and shall not be used for design without verification against the current edition of the standard. Ambient ratings apply from −20 °F (−29 °C) to 100 °F (38 °C). Rows highlighted in blue indicate the ambient temperature range.

← Group 2.2 Group 2.4 →

References

ASME B16.5-2020 — Pipe Flanges and Flanged Fittings: NPS ½ Through NPS 24 Metric/Inch Standard
Pressure ratings are maximum allowable non-shock working pressures (psig or bar gauge)
Intermediate temperatures may be interpolated linearly between tabulated values
Ratings apply to flanged fittings of the designated class, including flanges, flanged valves, and flanged end fittings
For temperatures below −20 °F (−29 °C), consult ASME B16.5 for specific material limitations