ASA150

Descriptions

The maximum working pressure of an ASA Class 150 flange (equivalent to ASME B16.5 Class 150) is highly dependent on the material and the operating temperature. The "150" designation is a class number, not a direct pressure value in PSI or bar across all conditions.

The following values are based on non-shock pressure and temperature ratings per the ASME B16.5 standard:

Temperature Range (°C)	Carbon Steel (e.g., ASTM A105) Max Pressure	Stainless Steel (e.g., ASTM A182 F304/F316) Max Pressure
-29°C to 38°C (Ambient)	19.6 bar (approx. 285 psi)	15.9 bar (approx. 230 psi)
100°C	17.7 bar (approx. 257 psi)	13.3 bar
200°C	13.8 bar (approx. 200 psi)	11.2 bar
300°C	10.0 bar (approx. 145 psi)	10.0 bar
400°C	6.5 bar (approx. 94 psi)	6.5 bar

Key Points:

At ambient temperature (up to approx. 38°C/100°F), a carbon steel Class 150 flange is rated for about 285 psi (19.6 bar).
The flange is only rated for exactly its nominal 150 psi around a much higher temperature of approximately 260°C (500°F).

Specifications

No detailed specifications are available for this product.

Downloads

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Code	Description	Price	Quantity
FL050RFWN-150	1/2 NB ASA150 RF WELD NCK ANSI B16.5 ASTM A105 STDW 4 In Stock for despatch	£21.00 (exc VAT) per EACH £25.20 (inc VAT)	- +
FL050RFWN-150LF	1/2 NB ASA150 RF WELD NCK ANSI B16.5 GRADE LF2 STDW Out of Stock	£42.00 (exc VAT) per EACH £50.40 (inc VAT)	- +
FL050RFWN-150XS	1/2 NB ASA150 RF WELD NCK ANSI B16.5 GRADE A105 X/S 1 In Stock for despatch	£25.00 (exc VAT) per EACH £30.00 (inc VAT)	- +
FL050RFWN150XLF	1/2 NB ASA150 RF WELD NCK ANSI B16.5 GRADE LF2 X/S 3 In Stock for despatch	£37.50 (exc VAT) per EACH £45.00 (inc VAT)	- +
FL075RFWN-150	3/4 NB ASA150 RF WELD NCK ANSI B16.5 ASTM A105 STDW 13 In Stock for despatch	£24.64 (exc VAT) per EACH £29.57 (inc VAT)	- +
FL075RFWN-15016	3/4 NB ASA150 RF WELD NCK ASTM A105 SCH160 Out of Stock	£51.00 (exc VAT) per EACH £61.20 (inc VAT)	- +
FL075RFWN-150LF	3/4 NB ASA150 RF WELD NCK ANSI B16.5 GRADE LF2 STDW Out of Stock	£45.00 (exc VAT) per EACH £54.00 (inc VAT)	- +
FL075RFWN-150XS	3/4 NB ASA150 RF WELD NCK ANSI B16.5 ASTM A105 X/STRONG 14 In Stock for despatch	£48.10 (exc VAT) per EACH £57.72 (inc VAT)	- +
FL075RFWN150XLF	3/4 NB ASA150 RF WELD NCK ANSI B16.5 GRADE LF2 X/S 4 In Stock for despatch	£48.00 (exc VAT) per EACH £57.60 (inc VAT)	- +
FL100RFWN-150	1" NB ASA150 RF WELD NCK ANSI B16.5 ASTM A105 STDW 5 In Stock for despatch	£31.50 (exc VAT) per EACH £37.80 (inc VAT)	- +
FL100RFWN-15016	1" NB ASA150 RF WELD NCK ASTM A105 SCH160 Out of Stock	£66.00 (exc VAT) per EACH £79.20 (inc VAT)	- +
FL100RFWN-150XS	1" NB ASA150 RF WELD NCK ASTM A105 EXTRA STRONG 3 In Stock for despatch	£42.10 (exc VAT) per EACH £50.52 (inc VAT)	- +
FL100RFWN150XLF	1" NB ASA150 RF WELD NCK ANSI B16.5 GRADE LF2 X/S Out of Stock	£59.20 (exc VAT) per EACH £71.04 (inc VAT)	- +
FL125RFWN-150	1.1/4" ASA 150 R/F WELD NECK STANDARD WEIGHT 1 In Stock for despatch	£32.80 (exc VAT) per EACH £39.36 (inc VAT)	- +
FL125RFWN-150XS	1.1/4" ASA 150 R/F WELD NECK SCH 80 Out of Stock	£49.50 (exc VAT) per EACH £59.40 (inc VAT)	- +
FL150RFWN-150	1.1/2" ASA150 RF WELD NCK ANSI B16.5 ASTM A105 STDW 5 In Stock for despatch	£56.70 (exc VAT) per EACH £68.04 (inc VAT)	- +
FL150RFWN-150XS	1.1/2" ASA150 RF WELD NCK ANSI B16.5 ASTM A105 X/S 5 In Stock for despatch	£64.00 (exc VAT) per EACH £76.80 (inc VAT)	- +
FL200RFWN-150	2" NB ASA150 RF WELD NCK ANSI B16.5 ASTM A105 STDW 9 In Stock for despatch	£56.70 (exc VAT) per EACH £68.04 (inc VAT)	- +
FL200RFWN-15016	2" NB ASA150 RF WELD NCK ANSI B16.5 A105 SCH 160 Out of Stock	£195.00 (exc VAT) per EACH £234.00 (inc VAT)	- +
FL200RFWN-15080	2" NB ASA150 RF WELD NCK ANSI B16.5 A105 SCH 80 6 In Stock for despatch	£124.80 (exc VAT) per EACH £149.76 (inc VAT)	- +
FL200RFWN-150LF	2" NB ASA150 RF WELD NCK A350 LF2 LOW TEMP STD WT Out of Stock	£300.00 (exc VAT) per EACH £360.00 (inc VAT)	- +
FL250RFWN-150	2.1/2" ASA150 RF WELD NCK ANSI B16.5 ASTM A105 STDW 1 In Stock for despatch	£77.62 (exc VAT) per EACH £93.14 (inc VAT)	- +
FL250RFWN-150LF	2.1/2" ASA150 RF WELD NCK ANSI B16.5 ASTM LF2 STDW 1 In Stock for despatch	£125.00 (exc VAT) per EACH £150.00 (inc VAT)	- +
FL300RFWN-150	3" NB ASA150 RF WELD NCK ANSI B16.5 ASTM A105 STDW 2 In Stock for despatch	£125.70 (exc VAT) per EACH £150.84 (inc VAT)	- +
FL300RFWN-150LF	3" NB ASA150 RF WELD NCK A350 LF2 LOW TEMP STD WT Out of Stock	£293.30 (exc VAT) per EACH £351.96 (inc VAT)	- +
FL300RFWN-150XS	3" NB ASA150 RF WELD NCK ANSI B16.5 ASTM A105 X/S Out of Stock	£99.60 (exc VAT) per EACH £119.52 (inc VAT)	- +
FL400RFWN-150	4" NB ASA150 RF WELD NCK ANSI B16.5 ASTM A105 STDW 6 In Stock for despatch	£183.50 (exc VAT) per EACH £220.20 (inc VAT)	- +
FL400RFWN-15080	4" NB ASA150 RF WELD NCK A105 SCH80 Out of Stock	£119.30 (exc VAT) per EACH £143.16 (inc VAT)	- +
FL400RFWN-150LF	4" NB ASA150 RF WELD NCK B16.5 STD WT LF2 LOW TEMP Out of Stock	£305.50 (exc VAT) per EACH £366.60 (inc VAT)	- +
FL500RFWN-150	5" NB ASA150 RF WELD NCK ANSI B16.5 ASTM A105 STDW 1 In Stock for despatch	£263.60 (exc VAT) per EACH £316.32 (inc VAT)	- +
FL600RFWN-150	6" NB ASA150 RF WELD NCK ANSI B16.5 ASTM A105 STDW 2 In Stock for despatch	£200.00 (exc VAT) per EACH £240.00 (inc VAT)	- +
FL600RFWN-150LF	6" NB ASA150 WELD NECK FLANGE LF2 LOW TEMP STDWT Out of Stock	£219.80 (exc VAT) per EACH £263.76 (inc VAT)	- +
FL600RFWN-150XS	6" NB ASA150 RF WELD NCK ANSI B16.5 ASTM A105 X/ST Out of Stock	£342.30 (exc VAT) per EACH £410.76 (inc VAT)	- +
FL800RFWN-150	8" NB ASA150 RF WELD NCK ANSI B16.5 ASTM A105 STDW 1 In Stock for despatch	£501.50 (exc VAT) per EACH £601.80 (inc VAT)	- +
FL800RFWN-15080	8" NB ASA150 RF WELD NCK A105 SCH80 Out of Stock	£309.60 (exc VAT) per EACH £371.52 (inc VAT)	- +
FL1000RFWN-150	10" NB ASA150 RF WELD NCK ANSI B16.5 ASTM A105 STDW 2 In Stock for despatch	£590.90 (exc VAT) per EACH £709.08 (inc VAT)	- +
FL1000RFWN15020	10" NB ASA150 RF WELD NCK ANSI B16.5 A105 SCH20 Out of Stock	£838.30 (exc VAT) per EACH £1,005.96 (inc VAT)	- +
FL1200RFWN-150	12" NB ASA150 RF WELD NCK ANSI B16.5 ASTM A105 STDW Out of Stock	£642.50 (exc VAT) per EACH £771.00 (inc VAT)	- +
FL1200RFWN150XS	12" NB ASA150 RF WELD NCK F105 EXTRA STRONG Out of Stock	£670.10 (exc VAT) per EACH £804.12 (inc VAT)	- +
FL1400RFWN-150	14" NB ASA150 RF WELD NCK ANSI B16.5 ASTM A105 STDW Out of Stock	£769.40 (exc VAT) per EACH £923.28 (inc VAT)	- +
FL1400RFWN-150X	14" NB ASA150 RF WELD NCK ANSI B16.5 ASTM A105 X/S Out of Stock	£1,150.00 (exc VAT) per EACH £1,380.00 (inc VAT)	- +
FL1600RFWN-150	16" NB ASA150 RF WELD NCK ANSI B16.5 ASTM A105 STDW Out of Stock	£1,125.00 (exc VAT) per EACH £1,350.00 (inc VAT)	- +
FL1600RFWN150XS	16" NB ASA150 RF WELD NCK A105 EXTRA STRONG Out of Stock	£1,141.00 (exc VAT) per EACH £1,369.20 (inc VAT)	- +
FL1800RFWN-150	18" NB ASA150 RF WELD NCK ANSI B16.5 ASTM A105 STDW Out of Stock	£1,100.00 (exc VAT) per EACH £1,320.00 (inc VAT)	- +
FL2000RFWN-150	20" NB ASA150 RF WELD NCK ANSI B16.5 ASTM A105 STDW Out of Stock	£1,550.00 (exc VAT) per EACH £1,860.00 (inc VAT)	- +
FL2400RFWN-150	24" NB ASA150 RF WELD NCK ANSI B16.5 ASTM A105 STDW Out of Stock	£1,750.00 (exc VAT) per EACH £2,100.00 (inc VAT)	- +

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