Reference scope

Common order references

Standard / Type	Product	Typical scope
Type	Blind / blank flange	RF / FF / RTJ
Class rating	150 to 2500	ASME B16.5 class recorded per item
Material	A105 / LF2 / stainless	By project requirement

Product data

Dimensions and specification tables

ANSI / ASME B16.5 Class 150 blind flange dimensions

NPS	OD D mm	Thickness b mm	Raised face g mm	Bolt circle k mm	Holes	Hole dia. l mm	Approx. kg
1/2"	88.9	11.1	34.9	60.3	4	15.9	0.400
3/4"	98.4	12.7	42.9	69.8	4	15.9	0.700
1"	107.9	14.3	50.8	79.4	4	15.9	0.900
1 1/2"	127.0	17.5	73.0	98.4	4	15.9	1.600
2"	152.4	19.0	92.1	120.6	4	19.0	2.600
3"	190.5	23.8	127.0	152.4	4	19.0	5.000
4"	228.6	23.8	157.2	190.5	8	19.0	7.100
6"	279.4	25.4	215.9	241.3	8	22.2	11.800
8"	342.9	28.6	269.9	298.4	8	22.2	21.000
10"	406.4	30.2	323.4	361.9	12	25.4	30.000
12"	482.6	31.7	381.0	431.8	12	25.4	45.000
16"	596.9	36.5	469.9	539.9	16	28.6	79.000
20"	698.5	42.9	584.2	635.0	20	31.7	124.000
24"	812.8	47.6	692.1	749.3	20	34.9	188.000

ANSI / ASME B16.5 Class 300 blind flange dimensions

NPS	OD D mm	Thickness b mm	Raised face g mm	Bolt circle k mm	Holes	Hole dia. l mm	Approx. kg
1/2"	95.2	14.3	34.9	66.7	4	15.9	0.700
3/4"	117.5	15.9	42.9	82.5	4	19.0	1.200
1"	123.8	17.5	50.8	88.9	4	19.0	1.500
1 1/2"	155.6	20.6	73.0	114.3	4	22.2	2.900
2"	165.1	22.2	92.1	127.0	8	19.0	3.400
3"	209.5	28.6	127.0	168.3	8	22.2	7.000
4"	254.0	31.7	157.2	200.0	8	22.2	11.800
6"	317.5	36.5	215.9	269.9	12	22.2	21.300
8"	381.0	41.3	269.9	330.2	12	25.4	35.200
10"	444.5	47.6	323.8	387.3	16	28.6	57.000
12"	520.7	50.8	381.0	450.8	16	31.7	82.000
16"	647.7	57.1	469.9	571.5	20	34.9	140.000
20"	774.7	63.5	584.2	685.8	24	34.9	223.000
24"	914.4	69.8	692.1	812.8	24	41.3	345.000

ANSI / ASME B16.5 Class 600 blind flange dimensions

NPS	OD D mm	Thickness b mm	Raised face g mm	Bolt circle k mm	Holes	Hole dia. l mm	Approx. kg
1/2"	95.2	14.3	34.9	66.7	4	15.9	0.700
3/4"	117.5	15.9	42.9	82.5	4	19.0	1.200
1"	123.8	17.5	50.8	88.9	4	19.0	1.500
1 1/2"	155.6	22.2	73.0	114.3	4	22.2	3.200
2"	165.1	25.4	92.1	127.0	8	19.0	4.300
3"	209.5	31.7	127.0	168.3	8	22.2	8.000
4"	273.0	38.1	157.2	215.9	8	25.4	18.000
6"	355.6	47.6	215.9	292.1	12	28.6	35.500
8"	419.1	55.6	269.9	349.2	12	31.7	58.000
10"	508.0	63.5	323.8	431.8	16	34.9	98.000
12"	558.8	66.7	381.0	488.9	20	34.9	125.000
16"	685.8	76.2	469.9	603.2	20	41.3	215.000
20"	812.8	88.9	584.2	723.9	24	44.4	366.000
24"	939.8	101.6	692.1	838.2	24	50.8	532.000

Use these tables for RFQ preparation. Final production should be confirmed against the required standard edition, drawing, material grade and certificate requirement.

Focused pages

Related European flange pages

ASME B16.5 Plate Flange

Plate / ring flange RF or FF inquiries for Class 150, 300 and 600 orders.

ASME B16.5 Weld Neck Flange

WNRF, WNFF and RTJ weld neck flange RFQs for pressure piping projects.

ASME B16.5 Slip On Flange

SORF and SOFF slip-on flange references for European buyers ordering American standard flanges.

ASME B16.5 Blind Flange

Blind / blank flange supply with RF, FF or RTJ facing requirements.

ASME B16.5 Class 150 / 300

Common Class 150 and Class 300 quotation range.

ASME B16.5 Materials

ASTM A105, A350 LF2, A182 stainless steel and certificate notes.

Supply notes

Supply and order notes

Facing choices

We separate RF, FF and RTJ facing requirements because thickness, groove and inspection checks may differ.

Material and marking

Buyers can request ASTM material marking, heat number traceability and EN 10204 3.1 documentation according to order scope.

Technical purchasing support

How Hyupshin turns the specification into a controlled flange order.

Dimension control

ANSI / ASME B16.5 production dimensions

Our technical team compares the requested standard edition and project drawing, then releases the applicable dimensions to production.

Pressure and facing

Class 150 to Class 2500 depending on type and project requirement

We record the Class, RF, FF or RTJ facing, bore or pipe schedule and tolerance notes on each ASME quotation line.

Product geometry

Blind manufacturing details

Flange type, sealing face, drilling, thickness and machining details are checked together so production and inspection use the same specification.

Documents

Certificate and inspection records

Our order file carries the agreed EN 10204 3.1, PED, AD 2000, UKCA, PMI, NDT and third-party inspection scope through to shipment.

Send this product for quotation

Request a quotation for this flange

Send the ASME B16.5 flange type, NPS, Class, facing, bore or pipe schedule, material grade, quantity and certificate requirement.

Send Inquiry

ANSI / ASME B16.5 Blind Flanges