Reference scope

Common order references

Standard / Type	Product	Typical scope
Type	WNRF / WNFF / WNRTJ	Facing and ring groove recorded where required
Class rating	150 / 300 / 400 / 600 / 900 / 1500 / 2500	By ASME B16.5 order scope
Bore	Schedule or drawing based	Required for price confirmation

Product data

Dimensions and specification tables

ANSI / ASME B16.5 Class 150 weld neck flange RF 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	0.500
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	1.100
1 1/4"	117.5	15.9	63.5	88.9	4	15.9	1.500
1 1/2"	127.0	17.5	73.0	98.4	4	15.9	1.800
2"	152.4	19.0	92.1	120.6	4	19.0	2.700
2 1/2"	177.8	22.2	104.8	139.7	4	19.0	4.400
3"	190.5	23.8	127.0	152.4	4	19.0	5.200
3 1/2"	215.9	23.8	139.7	177.8	8	19.0	6.400
4"	228.6	23.8	157.2	190.5	8	19.0	7.500
5"	254.0	23.8	185.7	215.9	8	22.2	9.200
6"	279.4	25.4	215.9	241.3	8	22.2	11.000
8"	342.9	28.6	269.9	298.4	8	22.2	18.300
10"	406.4	30.2	323.8	361.9	12	25.4	25.000
12"	482.6	31.7	381.0	431.8	12	25.4	39.000
14"	533.4	34.9	412.7	476.2	12	28.6	51.000
16"	596.9	36.5	469.9	539.7	16	28.6	60.000
18"	635.0	39.7	533.4	577.8	16	31.7	71.000
20"	698.5	42.9	584.2	635.0	20	31.7	88.000
22"	749.3	46.0	641.2	692.1	20	34.9	102.000
24"	812.8	47.6	692.1	749.3	20	34.9	119.000

ANSI / ASME B16.5 Class 300 weld neck flange RF 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	0.900
3/4"	117.5	15.9	42.9	82.5	4	19.0	1.500
1"	123.8	17.5	50.8	88.9	4	19.0	1.900
1 1/4"	133.3	19.0	63.5	98.4	4	19.0	2.600
1 1/2"	155.6	20.6	73.0	114.3	4	22.2	3.300
2"	165.1	22.2	92.1	127.0	8	19.0	3.600
2 1/2"	190.5	25.4	104.8	149.2	8	22.2	5.400
3"	209.5	28.6	127.0	168.3	8	22.2	7.400
3 1/2"	228.6	30.2	139.7	184.1	8	22.2	8.900
4"	254.0	31.7	157.2	200.0	8	22.2	11.900
5"	279.4	34.9	185.7	234.9	8	22.2	16.000
6"	317.5	36.5	215.9	269.9	12	22.2	20.200
8"	381.0	41.3	269.9	330.2	12	25.4	31.000
10"	444.5	47.6	323.4	387.3	16	28.6	44.300
12"	520.7	50.8	381.0	450.8	16	31.7	64.000
14"	584.2	54.0	412.7	514.3	20	31.7	88.000
16"	647.7	57.1	469.9	571.5	20	34.9	113.000
18"	711.2	60.3	533.4	628.6	24	34.9	134.000
20"	774.7	63.5	584.2	685.8	24	34.9	171.000
22"	838.2	66.7	641.2	742.9	24	41.3	195.000
24"	914.4	69.8	692.1	812.8	24	41.3	238.000

ANSI / ASME B16.5 Class 600 weld neck flange RF 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	0.900
3/4"	117.5	15.9	42.9	82.5	4	19.0	1.500
1"	123.8	17.5	50.8	88.9	4	19.0	1.900
1 1/4"	133.3	20.6	63.5	98.4	4	19.0	2.600
1 1/2"	155.6	22.2	73.0	114.3	4	22.2	3.300
2"	165.1	25.4	92.1	127.0	8	19.0	4.700
2 1/2"	190.5	28.6	104.8	149.2	8	22.2	6.500
3"	209.5	31.7	127.0	168.3	8	22.2	8.700
3 1/2"	228.6	34.9	139.7	184.1	8	25.4	11.200
4"	273.0	38.1	157.2	215.9	8	25.4	18.100
5"	330.2	44.4	185.7	266.7	8	28.6	30.500
6"	355.6	47.6	215.9	292.1	12	28.6	36.200
8"	419.1	55.6	269.9	349.2	12	31.7	56.500
10"	508.0	63.5	323.8	431.8	16	34.9	91.000
12"	558.8	66.7	381.0	488.9	20	34.9	105.000
14"	603.2	69.8	412.7	527.0	20	38.1	125.000
16"	685.8	76.2	469.9	603.2	20	41.3	178.000
18"	742.9	82.5	533.4	654.0	20	44.4	261.000
20"	812.8	88.9	584.2	723.9	24	44.4	268.000
22"	869.9	95.2	641.2	777.9	24	47.6	328.000
24"	939.8	101.6	692.1	838.2	24	50.8	380.000

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

Weld neck order control

Our weld neck quotation line carries NPS size, class rating, pipe schedule, bore, neck details, facing, material and inspection documents.

European purchasing note

For projects that mix EN 1092-1 and ASME B16.5, separate the RFQ lines clearly by standard and pressure rating.

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

Weld Neck 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.

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ANSI / ASME B16.5 Weld Neck Flanges