Class 300 Flange and ANSI 300 Blind/ Weld Neck/ SORF dimensions in mm

Refer ANSI 300 SORF, Blind and Weld Neck Flange dimensions in mm

Table Of Content:

Class 300 Flange Specification
ASME B16.5 Class 300 Flanges Price
Types of Class 300 Forged Flange
Class 300 Flange Material
Class 300 Flange Dimensions In Mm
Class 300 Slip On Flange Dimensions
Class 300 Weld Neck Flange Dimensions
300# Rf Flange Dimensions
Class 300 Blind Flange Dimensions
Socket Weld Flange Dimensions Class 300
Orifice Flange Dimensions Class 300
300# Lap Joint Flange Dimensions
ASME Cl300 Spectacle Blind Flange Dimensions
ANSI 300 Threaded Flange Dimensions
ANSI B16.5 Class 300 Plate Flange Dimensions
Class 300 Long Weld Neck Flange Dimensions
ASME B16.5 Class 300 Bleed Or Drip Ring Dimensions
ASME 300 Spades And Ring Spacers Dimensions
ANSI 300 Lbs Studding Outlet Dimensions

300 ANSI Flat Face Flange Dimensions
Class 300 RTJ Flange Dimensions
Class 300 Flange Thickness In Mm
10 Inch 300 Lb Flange Bolt Size
300# Flange Bolt Holes Number
ASME Class 300 Blind Flange Manufacturing Process
ANSI Class 300 Weld Neck Flange Installation
Class 300 Stainless Steel Flange Surface Finish
Facing Types Of Class 300 LB Flanges
Class 300 Flange Weight
ANSI Class 300 Flange Pressure Rating
Class 300 Flange Pipe Schedule
Class 300 Flange Gasket Dimensions In Mm
ASME B16.5 Class 300 Flange Size
Torque Table For Class 300 Flange
Class 300 Flange Pressure Rating Stainless Steel

Class 300 Flange Specification

Specification	Class 300 Flange
Manufacturer Length	NPS 1⁄₂" To NPS 48”
Face Type	RTJ/ FF/ RF/ lap joint/ Male & Female / Tongue & Groove.
Flange Test	Hydrostatic testing machine/ UI trasonic flaw detector/ X-ray detector/ Direct-reading Spectrograph/ Magnetic particle detector
Flange Equipment	Pushing Machine/ electric bevelling machine/ Press machine/ Bending machine/ Sand-blasting machine etc
Coating	Anti-rust Paint/ Zinc Plated/ Oil Black Paint/ Yellow Transparent/ Cold and Hot Dip Galvanized
Forging Methods	Casting/ Forging/ Rolling/ Cutting
Supporting Material	Gasket/ Ring Joint/ Flange Bolts
Schedule	SCH 5S, SCH 10, SCH 40, SCH 80, SCH 120, SCH 160, SCH 180 To XXS
Manufacturer Pressure Class	Class 150 (lb) up to 24" Class 300 (lb) up to 20" Class 600 (lb) up to 20" Class 900 (lb) up to 16" Class 1500 (lb) up to 10" Class 2500 (lb) up to 8"
Production Technique	Forged/ Heat treated and machined
Manufacturer of	Forged/ Threaded/ Screwed / Plate
Test Certificates	EN 10204/3.1B Raw Materials Certificate 100% Radiography Test Report Third Party Inspection Report, etc
Application	Bitumen upgraders Heavy oil refineries. Nuclear power (mostly seamless). Petrochemicals and acids.

Price stability can be seen in Class 300 Flange manufacturer in India
ASME B16.5 Class 300 Welding Neck Flange have high corrosion resistance, particularly to stress corrosion cracking
Very little or no maintenance material
Class 300 Forged Flanges are suitable for harsh conditions.
Buy from Class 300 Flange manufacturer in India for factory price
A largest Manufacturer, Traders, Wholesaler, Distributor, Source, Stock, Stockholder, Suppliers, Dealer, Distributor, Importer, Exporter, Fabricator & Stockist in Asia & Middle East.

Why pay extra? Buying from ASME CL300 Slip On Flange manufacturers save your cost, wide selection of ANSI 300 Socket Weld Flange and Orifice Flanges in India

ASME B16.5 Class 300 Flanges Price

Type Of Flange	Size In Inch	SCH	Class	Grade	Price In INR (India) Per Piece
Stainless Steel Blind Flange	3/4	40	300	ASTM A182 F316L	190.00
	1	40	300	-	253.00
-	1-1/2	40	300	-	430.00
-	2	40	300	-	690.00
Blind	4	40	300	-	1150.00
Stainless Steel Weld Neck Flange	2	STD	300	-	500.00
-	4	STD	300	-	790.00
-	6	80	300	-	1287.00
Weld Neck	6	80	300	-	1650.00
Stainless Steel Slip On Flange	2	40	300	-	287.00
-	3	40	300	-	550.00
-	8	80	300	-	1700.00
Slip On	8	80	300	ASTM A182 F316L	2200.00

Types Of Class 300 Forged Flange

ASME CL300 Blind Flanges

ANSI 300 Slip On Flanges

Welding Neck Flange ASME B16.5 Class 300

ANSI B16.5 Class 300 Socket Weld Flanges

ASME B16.5 Class 300 Plate Flanges

ASME 300 Lap Joint Flanges

ANSI 300 LBS Threaded Flanges

ASME 300 LBS Orifice Flanges

ASME Class 300 Spectacle Blind Flanges

ANSI Class 300 RTJ Flanges

ASME 300lb Raised Face Flanges

300# Reducing Flanges

ASME B16.5 Class 300 Welding Neck Flanges

300LB Square Flanges

ANSI 300 Flat Flanges

ASME CL300 Anchor Flanges

ANSI 300 Large Diameter Flanges

Class 300 High Hub Blind Flanges

Class 300 Flange Raised Face

Class 300 Rtj Flange

Class 300 Reducing Flange

ANSI Class 300 RF Flange

Class 300 Pipe Flange

Class 300 Plate Flange

Class 300 Aluminum Flange

Class 300 Stainless Steel Flange

Class 300 Carbon Steel Flange

Class 300 Alloy Steel Flange

Asa Class 300 Flange

Asme Class 300 Flat Face Flange

Class 300 Sorf Flange

Gi Flange Class 300

ASME Class 300 Lap Joint Flange

22 Nps Ansi 16.5 Class 300 Lapped Flange

Loose Flange Class 300

Class 300 Forged Flange

Class 300 Flange Material

Carbon Steel	ASTM/ASME A/SA105 A/SA105N & A/SA216-WCB, DIN 1.0402, DIN 1.0460, DIN 1.0619, Die Steel, ASTM A105 / ASME SA105, A105N, ASTM A350 LF2 / ASME SA350, High Yield CS ASTM A694 / A694 (F52 F56 F60 F65 F70 F80)
Stainless Steel	ASTM/ASME A/SA182 F304, F304L, F316, F316L, ASTM/ASME A/SA351 CF8/ CF3/ CF8M/ CF3M/ DIN 1.4301/ DIN 1.4306/ DIN 1.4401/ DIN 1.4404/ DIN 1.4308/ DIN 1.4408/ DIN 1.4306/ DIN 1.4409
Alloy Steel	ASTM A182 / ASME SA182 F5/ F9/ F11/ F12/ F22/ F91
Brass	3602 / 2604 / H59 / H62 / etc.
Inconel	ASTM B564 / ASME SB564, Inconel 600/ 601/ 625/ 718/ 783/ 690/ x750
Titanium	ASTM B381 / ASME SB381, Titanium Gr. 1, Titanium Gr. 2/ Titanium Gr. 4/ Titanium Gr. 5/ Titanium Gr. 7 ASTM R50250/GR.1 \| R50400/GR.2 \| R50550/GR.3 \| R50700/GR.4 \| GR.6 \|R52400/GR.7 \| R53400/GR.12 \| R56320/GR.9 \|R56400/GR.5
Hastelloy	ASTM B564 / ASME SB564, Hastelloy C276 (UNS N10276)/ C22 (UNS N06022)/ C4/ C2000/ B2/ B3/ X Flanges
Monel	ASTM B564 / ASME SB564, Monel 400 (UNS No. N04400)/ Monel 500 (UNS No. N05500)
Copper Nickel	ASTM / ASME SB 61 / 62 / 151 / 152/ Copper Nickel 90/10 (C70600 )/ Cupro Nickel 70/30 (C71500)/ UNS C71640
Alloy 20	ASTM B462 / ASME SB462/ Carpenter® 20 Alloy/ Alloy 20Cb-3
Aluminium	5052 /6061/ 6063 / 2017 / 7075 / etc.
Nickel	ASTM B564 / ASME SB564, Nickel 200/ Nickel 201/ Nickel 205/ Nickel 205LC
Duplex	S31803 / S32205 A182 Gr F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61
Super Duplex	S32750 / S32760 A182 Gr F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61
Incoloy	ASTM B564 / ASME SB564, Incoloy 800/ 800H/ 800HT (UNS N08800)/ 825 (UNS N08825)/ 925 Flanges
254 Smo	ASTM A182 / ASME SA182, SMO 254/6Mo/ UNS S31254/ DIN 1.4547
Nimonic	Nimonic 75/ Nimonic 80A/ Nimonic 90
Other material	Tin bronze/ Alumunum bronze/ Lead bronze

Class 300 Flange Dimensions In Mm

Class 300 Slip On Flange Dimensions

Normal Size Of Steel Pipe	Inner Diameter	Outer Daimeter	SORF Circle Bolt (B.C.)	Raised	Raised Face Of SORF	SORF Hight (H)	Wall Thickness Of (RF) Raised Face	(T1)	Thickness2 (Flat Face)	SORF Bolts Holes	Number Of SORF Flanges Bolt Hole
1/2	0.88	3.75	2.62	1.38	.063	1.50	0.88	0.50	0.82	0.62	4
3/4	1.09	4.62	3.25	1.69	.063	1.88	1.00	.056	0.94	0.75	4
1	1.36	4.88	3.50	2.00	.063	2.12	1.06	0.63	1.00	0.75	4
1-1/4	1.70	5.25	3.88	2.50	.063	2.50	1.06	0.69	1.00	0.75	4
1-1/2	1.95	6.12	4.50	2.88	.063	2.75	1.19	0.75	1.13	0.88	4
2	2.44	6.50	5.00	3.62	.063	3.31	1.31	0.82	1.25	0.75	8
2-1/2	2.94	7.50	5.88	4.12	.063	3.94	1.50	0.94	1.44	0.88	8
3	3.57	8.25	6.62	5.00	.063	4.62	1.69	1.06	1.63	0.88	8
3-1/2	4.07	9.00	7.25	5.50	.063	5.25	1.75	1.13	1.69	0.88	8
4	4.57	10.00	7.88	6.19	.063	5.75	1.88	1.19	1.82	0.88	8
5	5.66	11.00	9.25	7.31	.063	7.00	2.00	1.32	1.94	0.88	8
6	6.72	12.50	10.62	8.50	.063	8.12	2.06	1.38	2.00	0.88	12
8	8.72	15.00	13.00	10.62	.063	10.25	2.44	1.56	2.38	1.00	12
10	10.88	17.50	15.25	12.75	.063	12.62	2.62	1.82	2.56	1.12	16
12	12.88	20.50	17.75	15.00	.063	14.75	2.88	1.94	2.82	1.25	16
14	14.14	23.00	20.25	16.25	.063	16.75	3.00	2.06	2.94	1.25	20
16	16.16	25.50	22.50	18.50	.063	19.00	3.25	2.19	3.19	1.38	20
18	18.18	28.00	24.75	21.00	.063	21.00	3.50	2.32	3.44	1.38	24
20	20.20	30.50	27.00	23.00	.063	23.12	3.75	2.44	3.69	1.38	24
22	22.22	33.00	29.25	25.25	.063	25.25	4.00	2.57	3.94	1.63	24
24	24.25	36.00	32.00	27.25	.063	27.62	4.19	2.69	4.13	1.62	24

Class 300 Weld Neck Flange Dimensions

Normal Size Of Steel Pipe in Inch	Normal Size Of Steel Pipe In Millimeter	O.D.	Wall Thickness	Outer Daimeter Of Hub	Outer Daimeter Of WNRF	ASME B16.5 WNRF Length	WNRF Bore Daimeter	Raised Face Diameter	Height Of Raised Face	PCD	Face Of WNRF
		(A)	(B)	(C)	(D)	(E)	(F)	(G)	(H)	(I)	(J)
1/2	15	95	12.7	38	21.3	51	Refer Note	34.9	2	66.7	1.6
3/4	20	115	14.3	48	26.7	56		42.9	2	82.6	1.6
1	25	125	15.9	54	33.4	60		50.8	2	88.9	1.6
1 1/4	32	135	17.5	64	42.2	64		63.5	2	98.4	1.6
1 1/2	40	155	19.1	70	48.3	67		73	2	114.3	1.6
2	50	165	20.7	84	60.3	68		92.1	2	127	1.6
2 1/2	65	190	23.9	100	73	75		104.8	2	149.2	1.6
3	80	210	27	117	88.9	78		127	2	168.3	1.6
3 1/2	90	230	28.6	133	101.6	79		139.7	2	184.2	1.6
4	100	255	30.2	146	114.3	84		157.2	2	200	1.6
5	125	280	33.4	178	141.3	97		185.7	2	235	1.6
6	150	320	35	206	168.3	97		215.9	2	269.9	1.6
8	200	380	39.7	260	219.1	110		269.9	2	330.2	1.6
10	250	445	46.1	321	273	116		323.8	2	387.4	1.6
12	300	520	49.3	375	323.8	129		381	2	450.8	1.6
14	350	585	52.4	425	355.6	141		412.8	2	514.4	1.6
16	400	650	55.6	483	406.4	144		469.9	2	571.5	1.6
18	450	710	58.8	533	457	157		533.4	2	628.6	1.6
20	500	775	62	587	508	160		584.2	2	685.8	1.6
24	600	915	68.3	702	610	167		692.2	2	812.8	1.6

300# Rf Flange Dimensions

ASME/ANSI	Normal Pipe Size	Outside Diameter	Outside Diameter	Wall Thickness	Dia.	Dia.	Number	Dia.
ASME/ANSI	Normal Pipe Size	Dia.	Dia. Of	OF Flanges	OF Bolts	OF Bolts	Number	Dia.
Class	Size Of Pipe	Dia.	Dia. Of	OF Flanges	OF Bolts	OF Bolts	OF Bolts	OF Bolts
Class	Size Of Pipe	OF Flanges	(RF)	TTf	(Circle)	Holes	OF Bolts	OF Bolts
		OF Flanges	(RF)	TTf	(Circle)	Holes
300	6	12.50	8.50	1.38	10.62	0.88	12	0.75
300	8	15.00	10.62	1.56	13.00	1.00	12	0.87
	8	15.00	10.62	1.56	13.00	1.00	12	0.87
	10	17.50	12.75	1.82	15.25	1.12	16	1.00
	12	20.50	15.00	1.94	17.75	1.25	16	1.12
	14	23.00	16.25	2.06	20.25	1.25	20	1.12
	16	25.50	18.50	2.19	22.50	1.38	20	1.25
	18	28.00	21.00	2.31	24.75	1.38	24	1.25
	20	30.50	23.00	2.44	27.00	1.38	24	1.25
	1	4.88	2.00	0.69	3.50	0.75	4	0.62
	1 1/2	6.12	2.88	0.88	4.50	0.88	4	0.75
	2	6.50	3.62	1.00	5.00	0.75	8	0.62
	3	8.25	5.00	1.25	6.62	0.88	8	0.75
	4	10.75	6.19	1.50	8.50	1.00	8	0.87

Class 300 Blind Flange Dimensions

(Normal Size Of Steel Pipe) In Inch	Outer Daimeter Of (A)	WT (B)	RF Daimeter Of (C)	(D) (B.C.D.)	# BLRF Flange Bolts Holes	Daimeter Of BLRF Bolt Holes	Weight in Kg (Kilogram)
1/2	3-3/4	9/16	1-3/8	2-5/8	4	5/8	2
3/4	4-5/8	5/8	1-11/16	3-1/4	4	3/4	3
1	4-7/8	11/16	2	3-1/2	4	3/4	4
1-1/4	5-1/4	3/4	2-1/2	3-7/8	4	3/4	6
1-1/2	6-1/8	13/16	2-7/8	4-1/2	4	7/8	7
2	6-1/2	7/8	3-5/8	5	8	3/4	8
2-1/2	7-1/2	1	4-1/8	5-7/8	8	7/8	12
3	8-1/4	1-1/8	5	6-5/8	8	7/8	16
3-1/2	9	1-3/16	5-1/2	7-1/4	8	7/8	21
4	10	1-1/4	6-3/16	7-7/8	8	7/8	28
5	11	1-3/8	7-5/16	9-1/4	8	7/8	37
6	12-1/2	1-7/16	8-1/2	10-5/8	12	7/8	48
8	15	1-5/8	10-5/8	13	12	1	79
10	17-1/2	1-7/8	12-3/4	15-1/4	16	1-1/8	122
12	20-1/2	2	15	17-3/4	16	1-1/4	183
14	23	2-1/8	16-1/4	20-1/4	20	1-1/4	241
16	25-1/2	2-1/4	18-1/2	22-1/2	20	1-3/8	315
18	28	2-3/8	21	24-3/4	24	1-3/8	414
20	30-1/2	2-1/2	23	27	24	1-3/8	515
24	36	2-3/4	27-1/4	32	24	1-5/8	800

Socket Weld Flange Dimensions Class 300

ASME B16.5 Class 150 Socket Weld Flange Dimensions

NPS Of SWRF	Outer Diameter	Diameter of RF	Minimum Thickness	Hub Diameter	Through Hub Length	Bore Diameter	Socket Depth	Bolt Circle Diameter	Bolt Holes Diameter	Flanges Bolt Number	Weight In Kilogram	-
(NPS)	(O)	(R)	(tf)	(X)	(Y)	(B1)	(B2)	(D)	(W)	(I)	(n)	(-)
1/2	95	34.9	12.7	38	21	22.2	15.8	10	66.7	15.9	4	0.67
3/4	115	42.9	14.3	48	24	27.7	20.9	11	82.6	19.1	4	1.11
1	125	50.8	15.9	54	25	34.5	26.6	13	88.9	19.1	4	1.43
1 1/4	135	63.5	17.5	64	25	43.2	35.1	14	98.4	19.1	4	1.79
1 1/2	155	73.0	19.1	70	29	49.5	40.9	16	114.3	22.2	4	2.57
2	165	92.1	20.7	84	32	61.9	52.5	17	127.0	19.1	8	3.01
2 1/2	190	104.8	23.9	100	37	74.6	62.7	19	149.2	22.2	8	4.55
3	210	127.0	27.0	117	41	90.7	77.9	21	168.3	22.2	8	6.18

Orifice Flange Dimensions Class 300

Orifice Size in Inchch	Orifice Size in mm	Outer Diameter (O.D.)	Orifice Flange Thickness	Hub Outer Diameter	Weld Neck Outer Diameter	Length Of Welding Neck	RF Diameter	Height Of RF	PCD	Orifice Hole diameter	Number of Bolts	Bolt Size In UNC	Stud Length Of RF	Size Of Hole	Stud Size In ISO	Weight in Kilogram
A	B	C	D	E	F	G	H	I	-	-	-	-	-	-	-	-
1	25	125	36.6	54	33.4	81	50.8	2	88.9	6.4	4	5/8	125	3/4	M16	4.5
1 1/2	40	155	36.6	70	48.3	84	73	2	114.3	6.4	4	3/4	135	7/8	M20	6.5
2	50	165	36.6	84	60.3	84	92.1	2	127	6.4	8	5/8	125	3/4	M16	7
2 1/2	65	190	36.6	100	73	87	104.8	2	149.2	6.4	8	3/4	135	7/8	M20	7.5
3	80	210	36.6	117	88.9	87	127	2	168.3	9.5	8	3/4	135	7/8	M20	9.4
4	100	255	36.6	146	114.3	90	157.2	2	200	12.7	8	3/4	135	7/8	M20	13.2
6	150	320	36.6	206	168.3	98	215.9	2	269.9	12.7	12	3/4	135	7/8	M20	14.6
8	200	380	39.7	260	219.1	110	269.9	2	330.2	12.7	12	7/8	145	1	M24	30
10	250	445	46.1	321	273	116	323.8	2	387.3	12.7	16	1	165	1 1/8	M27	41
12	300	520	49.3	375	323.8	129	381	2	450.8	12.7	16	1 1/8	180	1 1/4	M30	62
14	350	585	52.4	425	355.6	141	412.8	2	514.4	12.7	20	1 1/8	185	1 1/4	M30	84
16	400	650	55.6	483	406.4	144	469.9	2	571.5	12.7	20	1 1/4	195	1 3/8	M33	111
18	450	710	58.8	533	457	157	533.4	2	628.6	12.7	24	1 1/4	205	1 3/8	M33	138
20	500	775	62	587	508	160	584.2	2	685.8	12.7	24	1 1/4	215	1 3/8	M33	171
24	600	915	68.3	702	610	167	692.2	2	812.8	12.7	24	1 1/2	240	1 5/8	M39	247

Supplier of ANSI B16.5 Class 300 Lap Joint Flange and ASME 300 Long Weld Neck Flange with stamping, marking & MTR

300# Lap Joint Flange Dimensions

Normal Size Of Steel Pipe In Inch	Normal Size Of Steel Pipe in MM	O.D.	(WT)	Lapped Thickness	Inner Daimeter	PCD	Lapped Thickness	Lap Joint Radius	LJ Bolts Number	Bolts Size In UNC	Length Of Machine Bolt	Length Of (RF) Stud	Lap Joint Flange Bolts Hole Size	ISO Stud Size	Weight In Kilogram (KG)
		A	B	C	D	E	G
1/2	15	95	38	22	22.9	66.7	14.3	3	4	1/2	55	65	5/8	M14	1.2
3/4	20	115	48	25	28.2	82.6	15.9	3	4	5/8	65	75	3/4	M16	1.4
1	25	125	54	27	34.9	88.9	17.5	3	4	5/8	65	75	3/4	M16	1.4
1 1/4	32	135	64	27	43.7	98.4	19.1	5	4	5/8	70	85	3/4	M16	1.8
1 1/2	40	155	70	30	50	114.3	20.7	6	4	3/4	75	90	7/8	M20	2.7
2	50	165	84	33	62.5	127	22.3	8	8	5/8	75	90	3/4	M16	3.2
2 1/2	65	190	100	38	75.4	149.2	25.4	8	8	3/4	85	100	7/8	M20	4.6
3	80	210	117	43	91.4	168.3	28.6	10	8	3/4	90	110	7/8	M20	5.9
3 1/2	90	230	133	44	104.1	184.2	30.2	11	8	3/4	95	110	7/8	M20	7.7
4	100	255	146	48	116.8	200	31.8	11	8	3/4	95	115	7/8	M20	10
5	125	280	178	51	144.4	235	35	11	8	3/4	110	120	7/8	M20	12.7
6	150	320	206	52	171.4	269.9	36.6	13	12	3/4	110	120	7/8	M20	17.7
8	200	380	260	62	222.2	330.2	41.3	13	12	7/8	120	140	1	M24	26
10	250	445	321	95	277.4	387.4	47.7	13	16	1	140	160	1 1/8	M27	36
12	300	520	375	102	328.2	450.8	50.8	13	16	1 1/8	145	170	1 1/4	M30	52
14	350	585	425	111	360.2	514.4	54	13	20	1 1/8	160	180	1 1/4	M30	75
16	400	650	483	121	411.2	571.5	57.2	13	20	1 1/4	165	190	1 3/8	M33	86
18	450	710	533	130	462.3	628.6	60.4	13	24	1 1/4	170	195	1 3/8	M33	113
20	500	775	587	140	514.4	685.8	63.5	13	24	1 1/4	185	205	1 3/8	M33	143
24	600	915	702	153	616	812.8	69.9	13	24	1 1/2	205	230	1 5/8	M39	216

ASME Cl300 Spectacle Blind Flange Dimensions

Normal Pipe Size	Outside Diameter Of (A)	Inside Diameter Of (B)	Center Line (C)	Wall Thikness t	Width Of Web (W)
1/2	51	16	65	6.4	38
3/4	64	21	80	6.4	38
1	70	27	90	6.4	38
1.1/4	79	42	100	6.4	38
1.1/2	92	48	115	6.4	38
2	108	61	125	9.7	51
2.1/2	127	73	150	9.7	51
3	146	89	170	9.7	64
3.1/2	162	102	185	12.7	64
4	178	114	200	12.7	64
5	213	141	235	15.7	76
6	248	168	270	15.7	76
8	305	219	330	22.4	76
10	359	273	385	25.4	102
12	419	324	450	28.4	102
14	483	356	515	31.8	108
16	536	406	570	38.1	108
18	594	457	630	41.1	114
20	651	508	685	44.5	121
24	772	610	810	50.8	140

ANSI 300 Threaded Flange Dimensions

Size Of Bore	(D) Diameter	WT Of(E)	(F) Diameter	(B) Diameter	(A) Diameter	Height	Nbr	Bolts Holes	(C)Diameter
1/2	95	12.7	35.05	38	23.6	21	4	15.87	66.7
3/4	115	14.3	42.92	48	29.0	24	4	19.05	82.6
1	125	15.9	50.80	54	35.8	25	4	19.05	88.9
1 1/4	135	17.5	63.50	64	44.4	25	4	19.05	98.4
1 1/2	155	19.1	73.15	70	50.3	29	8	22.22	114.3
2	165	20.7	91.94	84	63.5	32	8	19.05	127.0
2 1/2	190	23.9	104.65	100	76.2	37	8	22.22	149.2
3	210	27.0	127.00	117	92.2	41	8	22.22	168.3
3 1/2	230	28.6	139.70	133	104.9	43	8	22.22	184.2
4	255	30.2	157.22	146	117.6	46	8	22.22	200.0
5	280	33.4	185.67	178	144.4	49	8	22.22	235.0
6	320	35.0	215.90	206	171.4	51	12	22.22	269.9
8	380	39.7	269.75	260	222.2	60	12	25.40	330.2
10	445	46.1	323.85	321	276.2	65	16	28.57	387.4
12	520	49.3	381.00	375	328.6	71	16	31.75	450.8
14	585	52.4	412.75	425	360.4	75	20	31.75	514.4
16	650	55.6	469.90	483	411.2	81	20	34.92	571.5
18	710	58.8	533.40	533	462.0	87	24	34.92	628.6
20	775	62.0	584.20	587	512.8	94	24	34.92	685.8
24	915	68.3	692.15	702	614.4	105	24	41.27	812.8

ANSI B16.5 Class 300 Plate Flange Dimensions

Class 300 Long Weld Neck Flange Dimensions

(Normal Size Of Steel Pipe)	Outer Diameter Of (A)	RF Diameter Of (B)	WT Of (C)	Bore Dia. (D)	Hub Dia. at Base (J)	Length Of Hub (K)	Nuts And Bolts Stop Dia. NS	Nuts And Bolts Relief Dia. NR	Nuts And Bolts Relief Length Of NL	Number of Bolts Holes	Bolts Holes Diameter	B.C. ( Bolt Circle) Diameters P	Weight in KG (Kilogram)
1/2	3 1/2	1 3/8	7/16	0.50	1 1/4	9	1 1/2	1 1/4	3/4	4	5/8	2 3/8	21
3/4	3 7/8	1 11/16	1/2	0.75	1 5/8	9	1 7/8	1 5/8	3/4	4	5/8	2 3/4	27
1	4 1/4	2	9/16	1.00	2	9	2 1/ 4	2	3/4	4	5/8	3 1/8	30
1 1/4	4 5/8	2 1/2	5/8	1.25	2 3/8	9	2 5/8	2 3/8	3/4	4	5/8	3 1/2	36
1 1/2	5	2 7/8	11/16	1.50	2 5/8	9	3	2 5/8	3/4	4	5/8	3 7/8	41
2	6	3 5/8	3/4	2.00	3 1/4	9	3 11/ 16	3 1/16	7/8	4	3/4	4 3/4	57
2 1/2	7	4 1/8	7/8	2.50	3 3/4	9	4 7/16	3 3/4	7/8	4	3/4	5 1/2	79
3	7 1/2	5	15/16	3.00	4 1/4	9	4 15/15	4 1/4	7/8	4	3/4	6	86
3 1/2	8 1/2	5 1/2	15/16	3.50	4 7/8	9	5 15/16	4 7/8	7/8	8	3/4	7	110
4	9	6 3/16	15/16	4.00	5 1/2	12	6 7/16	5 1/2	7/8	8	3/4	7 1/2	164
5	10	7 5/16	15/16	5.00	6 1/2	12	7 1/2	6 1/2	1	8	7/8	8 1/2	189
6	11	8 1/2	1	6.00	7 3/4	12	8 1/4	7 3/4	1	8	7/8	9 1/2	216
8	13 1/2	10 5/8	1 1/8	8.00	9 3/4	12	10 1/2	9 3/4	1	8	7/8	11 3/4	292
10	16	12 3/4	1 3/16	10.00	12	12	12 7/8	12	1 1/8	12	1	14 1/4	382
12	19	15	1 1/4	12.00	14 3/8	12	15 9/16	14 3/8	1 1/2	12	1	17	535
14	21	16 1/4	1 3/8	14.00	16	12	17 1/8	16	1 1/4	12	1 1/8	18 3/4	585
16	23 1/2	18 1/2	1 7/16	16.00	18	12	19 5/8	18	1 1/4	16	1 1/8	21 1/4	714
18	25	21	1 9/16	18.00	20	12	20 15/16	20	1 3/8	16	1 1/4	22 3/4	711
20	27 1/2	23	1 11/16	20.00	22	12	23 3/16	22	1 3/8	20	1 1/4	25	840

ASME B16.5 Class 300 Bleed Or Drip Ring Dimensions

Normal Pipe Size	Inner Diameter
1	63.5
1.1/2	82.6
2	101.6
2.1/2	120.7
3	133.4
4	171.5
6	219.1
8	276.2
10	336.6
12	406.4

ASME 300 Spades And Ring Spacers Dimensions

Normal Pipe Size	Outside Diameter Of (A)	Inside Diameter Of (B)	Center End (C)	Wall Thick ness Of (T)	Handle Width W
1/2	51	16	129	6.4	32
3/4	64	21	136	6.4	32
1	70	27	139	6.4	32
1.1/4	79	42	150	6.4	32
1.1/2	92	48	150	6.4	32
2	108	61	158	9.7	32
2.1/2	127	73	177	9.7	32
3	146	89	177	9.7	32
3.1/2	162	102	205	12.7	38
4	178	114	205	12.7	38
5	213	141	240	15.7	38
6	248	168	240	15.7	38
8	305	219	281	22.4	38
10	359	273	333	25.4	44
12	419	324	363	28.4	44
14	483	356	395	31.8	44
16	536	406	422	38.1	44
18	594	457	450	41.1	51
20	651	508	480	44.5	51
24	772	610	540	50.8	51

ANSI 300 Lbs Studding Outlet Dimensions

Normal Bore	Outer Diameter	Wall Thickness	Outer Diameter of RF	Circle Of Stud	Diameter Of Hole	# Number of Holes	Depth Of Hole	Size Of Tap	T.P.I.	Depth Of Tap	Weight Of Flat Bottom
(B)	(O)	(T)	(R)	(C)	()	()	(U)	()	()	(V)	(Base)	(per 1″)
1/2	3.75	1.25	1.38	2.62	27/64	4	0.88	1/2	13	0.56	3.5	3.1
3/4	4.62	1.5	1.69	3.25	17/32	4	1.12	5/8	11	0.75	6.4	4.6
1	4.88	1.5	2	3.5	17/32	4	1.12	5/8	11	0.75	7	5.1
1 1/4	5.25	1.5	2.5	3.88	17/32	4	1.12	5/8	11	0.75	8	5.8
1 1/2	6.12	1.75	2.88	4.5	21/32	4	1.31	3/4	10	0.88	13	7.8
2	6.5	1.5	3.62	5	17/32	8	1.12	5/8	11	0.75	12	8.5
2 1/2	7.5	1.75	4.12	5.88	21/32	8	1.31	3/4	10	0.88	18	11
3	8.25	1.75	5	6.62	21/32	8	1.31	3/4	10	0.88	22	14
3 1/2	9	1.75	5.5	7.25	21/32	8	1.31	3/4	10	0.88	25	15
4	10	1.75	6.19	7.88	21/32	8	1.31	3/4	10	0.88	30	19
5	11	1.75	7.31	9.25	21/32	8	1.31	3/4	10	0.88	36	21
6	12.5	1.75	8.5	10.62	21/32	12	1.31	3/4	10	0.88	44	27
8	15	1.88	10.62	13	49/64	12	1.44	7/8	9	1	63	36
10	17.5	2.12	12.75	15.25	7/8	16	1.56	1	8	1.12	90	46
12	20.5	2.25	15	17.75	1	16	1.81	1 1/8	8	1.25	127	61
14	23	2.25	16.25	20.25	1	20	1.81	1 1/8	8	1.25	153	74
16	25.5	2.5	18.5	22.5	1 1/8	20	2.12	1 1/4	8	1.44	201	88
18	28	2.5	21	24.75	1 1/8	24	2.12	1 1/4	8	1.44	235	102
20	30.5	2.5	23	27	1 1/8	24	2.12	1 1/4	8	1.44	273	118
24	36	2.88	27.25	32	1 3/8	24	2.38	1 1/2	8	1.69	425	160

300 ANSI Flat Face Flange Dimensions

NPS	Pipe Diameter		Inner Diameter	Number of holes	Diameter Of Flange	Thickness of Flange	Diameter of (B.C) Bolt Circle	Diameter of (B.H) Bolt Holes	Weight In KG
(DN)	(ISO)	(DIN)	(D5)	(BN)	(D)	(b)	(K)	(d2)	(KG/PCS)
10	–	14	14.5	4	90	16	60	14	0.7
10	17.2	–	17.7	4	90	16	60	14	0.69
15	–	20	21	4	95	16	65	14	0.77
15	21.3	–	22	4	95	16	65	14	0.77
20	–	25	26	4	105	18	75	14	1.06
20	26.9	–	27.6	4	105	18	75	14	1.05
25	–	30	31	4	115	18	85	14	1.27
25	33.7	–	34.4	4	115	18	85	14	1.25
32	–	38	39	4	140	18	100	18	1.86
32	42.4	–	43.1	4	140	18	100	18	1.83
40	–	44.5	45.5	4	150	18	110	18	2.12
40	48.3	–	49	4	150	18	110	18	2.09
50	–	57	58.1	4	165	20	125	18	2.78
50	60.3	–	61.1	4	165	20	125	18	2.74
65	76.1	–	77.1	8	185	22	145	18	3.48
80	88.9	–	90.3	8	200	24	160	18	4.33
100	–	108	109.6	8	235	24	190	22	5.82
100	114.3	–	115.9	8	235	24	190	22	5.61
125	–	133	134.8	8	270	26	220	26	7.91
125	139.7	–	141.6	8	270	26	220	26	7.6
150	–	159	161.1	8	300	28	250	26	10.12
150	168.3	–	170.5	8	300	28	250	26	9.58
175	193.7	–	196.1	12	350	32	295	30	14.45
200	219.1	–	221.8	12	375	34	320	30	16.9
250	–	267	270.2	12	450	38	385	33	27.28
250	273	–	276.2	12	450	38	385	33	26.51
300	323.9	–	327.6	16	515	42	450	33	36.38
350	355.6	–	359.7	16	580	46	510	36	52.83
350	–	368	372.2	16	580	46	510	36	50.24
400	406.4	–	411	16	660	50	585	39	74.71
400	–	419	423.7	16	660	50	585	39	71.44
500	508	–	513.6	20	755	52	670	42	86.87
600	610	–	616.5	20	890	54	795	48	121.84
700	711	–	716	24	995	58	900	48	150.93
800	813	–	818	24	1140	64	1030	56	219.08
900	914	–	920	28	1250	70	1140	56	271.16
1000	1016	–	1022	28	1360	78	1250	56	344.95

Class 300 RTJ Flange Dimensions

RTJ Flange Size in Inch	RTJ Flanges Size in MM	Outer Diameter	Wall Thickness Of Ring Type Joint	Outer Daimeter Of Hub	Outer Daimeter Of Weld Neck	Lengths Of Welding Neck	Diameter Of RF (Raised Face)	Height Of RF (Raised Face)	PCD	Diameter Pitch Of RTJ Flanges	Depth Of RTJ Flanges	Ring Type Joint Flange Width
(A)	(B)	(C)	(D)	(E)	(F)	(G)	(H)	(I)	(J)	(K)	(L)	-
1/2	15	95	12.7	38	21.3	51	51	5.54	66.7	34.14	5.54	7.14
3/4	20	115	14.3	48	26.7	56	63.5	6.35	82.6	42.88	6.35	8.74
1	25	125	15.9	54	33.4	60	70	6.35	88.9	50.8	6.35	8.74
1 1/4	32	135	17.5	64	42.2	64	79.5	6.35	98.4	60.33	6.35	8.74
1 1/2	40	155	19.1	70	48.3	67	90.5	6.35	114.3	68.27	6.35	8.74
2	50	165	20.7	84	60.3	68	108	7.92	127	82.55	7.92	11.91
2 1/2	65	190	23.9	100	73	75	127	7.92	149.2	101.6	7.92	11.91
3	80	210	27	117	88.9	78	146	7.92	168.3	123.83	7.92	11.91
3 1/2	90	230	28.6	133	101.6	79	159	7.92	184.2	131.78	7.92	11.91
4	100	255	30.2	146	114.3	84	175	7.92	200	149.23	7.92	11.91
5	125	280	33.4	178	141.3	97	210	7.92	235	180.98	7.92	11.91
6	150	320	35	206	168.3	97	241	7.92	269.9	211.12	7.92	11.91
8	200	380	39.7	260	219.1	110	302	7.92	330.2	269.88	7.92	11.91
10	250	445	46.1	321	273	116	356	7.92	387.4	323.85	7.92	11.91
12	300	520	49.3	375	323.8	129	413	7.92	450.8	381	7.92	11.91
14	350	585	52.4	425	355.6	141	457	7.92	514.4	419.1	7.92	11.91
16	400	650	55.6	483	406.4	144	508	7.92	571.5	469.9	7.92	11.91
18	450	710	58.8	533	457	157	575	7.92	628.6	533.4	7.92	11.91
20	500	775	62	587	508	160	635	9.53	685.8	584.2	9.53	13.49
24	600	915	68.3	702	610	167	749	11.13	812.8	692.15	11.13	16.66

Class 300 Flange Thickness In Mm

NPS	Outer Diameter (O.D)	Minimum Wall Thickness (T)	(RF) Diameter (R)	Number of Bolt Holes	Holes Diameter	BC (Bolt Circle)	SO Bore Inner Diameter (SB)	WN Bore Inner Diameter (WB)	Diameter Hub Base (HB)	Diameter of Hub Top (HT)	SO Length (SL)	WN Length (WL)
¹⁄₂	3.50	0.38	1.38	4	0.62	2.38	0.88	0.62	1.19	0.84	0.56	1.81
³⁄₄	3.88	0.44	1.69	4	0.62	2.75	1.09	0.82	1.50	1.05	0.56	2.00
1	4.25	0.50	2.00	4	0.62	3.12	1.36	1.05	1.94	1.32	0.62	2.12
1¹⁄₄	4.62	0.56	2.50	4	0.62	3.50	1.70	1.38	2.31	1.66	0.75	2.19
1¹⁄₂	5.00	0.62	2.88	4	0.62	3.88	1.95	1.61	2.56	1.90	0.81	2.38
2	6.00	0.69	3.62	4	0.75	4.75	2.44	2.07	3.06	2.38	0.94	2.44
2¹⁄₂	7.00	0.81	4.12	4	0.75	5.50	2.94	2.47	3.56	2.88	1.06	2.69
3	7.50	0.88	5.00	4	0.75	6.00	3.57	3.07	4.25	3.50	1.12	2.69
3¹⁄₂	8.50	0.88	5.50	8	0.75	7.00	4.07	3.55	4.81	4.00	1.19	2.75
4	9.00	0.88	6.19	8	0.75	7.50	4.57	4.03	5.31	4.50	1.25	2.94
5	10.00	0.88	7.31	8	0.88	8.50	5.66	5.05	6.44	5.56	1.38	3.44
6	11.00	0.94	8.50	8	0.88	9.50	6.72	6.07	7.56	6.63	1.50	3.44
8	13.50	1.06	10.62	8	0.88	11.75	8.72	7.98	9.69	8.63	1.69	3.94
10	16.00	1.12	12.75	12	1.00	14.25	10.88	10.02	12.00	10.75	1.88	3.94
12	19.00	1.19	15.00	12	1.00	17.00	12.88	12.00	14.38	12.75	2.12	4.44
14	21.00	1.31	16.25	12	1.12	18.75	14.14	13.25	15.75	14.00	2.19	4.94
16	23.50	1.38	18.50	16	1.12	21.25	16.16	15.25	18.00	16.00	2.44	4.94
18	25.00	1.50	21.00	16	1.25	22.75	18.18	17.25	19.88	18.00	2.62	5.44
20	27.50	1.62	23.00	20	1.25	25.00	20.20	19.25	22.00	20.00	2.81	5.62
22	29.50	1.75	25.25	20	1.38	27.25	22.22	21.25	24.25	22.00	3.07	5.82
24	32.00	1.81	27.25	20	1.38	29.50	24.25	23.25	26.12	24.00	3.19	5.94

10 Inch 300 Lb Flange Bolt Size

NPS	Class 300 Flanges
	Diameter of Bolt Circle (B.C.)	Diameter of Bolts	Number of Bolts	Bolts Length
	Diameter of Bolt Circle (B.C.)	Diameter of Bolts	Number of Bolts	Stud Bolts For Raised Face (RF)	Machine Bolts For Raised Face (RF)
1/2	2-5/8	1/2	4	2-1/2	2
3/4	3-1/4	5/8	4	2-3/4	2-1/2
1	3-1/2	5/8	4	3	2-1/2
1-1/4	3-7/8	5/8	4	3	2-3/4
1-1/2	3-1/2	3/4	4	3-1/2	3
2	5	5/8	8	3-1/4	3
2-1/2	5-7/8	3/4	8	3-3/4	3-1/4
3	6-5/8	3/4	8	4	3-1/2
3-1/2	7-1/4	3/4	8	4-1/4	3-3/4
4	7-7/8	3/4	8	4-1/4	3-3/4
5	9-1/4	3/4	8	4-1/2	4
6	10-5/8	3/4	12	4-3/4	4-1/4
8	13	7/8	12	5-1/4	4-3/4
10	15-1/4	1	16	6	5-1/4
12	17-3/4	1-1/8	16	6-1/2	5-3/4
14	20-1/4	1-1/8	20	6-3/4	6
16	22-1/2	1-1/4	20	7-1/4	6-1/2
18	24-3/4	1-1/4	24	7-1/2	6-3/4
20	27	1-1/4	24	8	7
22	29-1/4	1-1/2	24	8-3/4	7-1/2
24	32	1-1/2	24	9	7-3/4
26	34-1/2	1-5/8	28	10	8-3/4
30	39-1/4	1-3/4	28	11-1/4	10
34	43-1/2	1-7/8	28	12-1/4	10-3/4
36	46	2	32	12-3/4	11-1/4
42	52-3/4	2	36	13-3/4	13

300# Flange Bolt Holes Number

NPS In (inches)	Class 300 Flanges
NPS In (inches)	Dia. of Flange (inches)	Number of Bolts	Dia. of Bolts In (inches)	Dia. of Bolt Holes (inches)	Bolt Circle (B.C.) In (inches)
1/4	3-3/8	4	1/2	0.62	2-1/4
1/2	3-3/4	4	1/2	0.62	2-5/8
3/4	4-5/8	4	5/8	0.75	3-1/4
1	4-7/8	4	5/8	0.75	3-1/2
1-1/4	5-1/4	4	5/8	0.75	3-7/8
1-1/2	6-1/8	4	3/4	0.88	4-1/2
2	6-1/2	8	5/8	0.75	5
2-1/2	7-1/2	8	3/4	0.88	5-7/8
3	8-1/4	8	3/4	0.88	6-5/8
3-1/2	9	8	3/4	0.88	7-1/4
4	10	8	3/4	0.88	7-7/8
5	11	8	3/4	0.88	9-1/4
6	12-1/2	12	3/4	0.88	10-5/8
8	15	12	7/8	1	13
10	17-1/2	16	1	1.12	15-1/4
12	20-1/2	16	1-1/8	1.25	17-3/4
14	23	20	1-1/8	1.25	20-1/4
16	25-1/2	20	1-1/4	1.38	22-1/2
18	28	24	1-1/4	1.38	24-3/4
20	30-1/2	24	1-1/4	1.38	27
24	36	24	1-1/2	1.62	32

ASME Class 300 Blind Flange Manufacturing Process

Raw Material

Raw Materia
Materia Dimension And Visual
Materia Quantity

Inspection

Chemical And Mechanical Analysis
Analysis Of Preservation Certificate

Cutting

Cut Surface
Marking
Weight Measuring

Forging Flange

Grade Of Material
Control Flange Temperature

Heat Treatment

Flange Solution Treatment
Flanges Mechanical Test
Normalizing

Forging Rolling Of Flange

Check Dimension
Check Marking
Check Weight

Final Inspection Of Pipe Flange

Test Of Visual
Test Of Nondestructive

Rust Prevention

View Preserve
Marking
Heat Number

Packaging

Specification Of Packing
Inspection Of Packing
Delivery Time And Day

ANSI Class 300 Weld Neck Flange Installation

Class 300 Stainless Steel Flange Surface Finish

Normal Pipe Size	(A)	(B)
1/2	3.0	1.5
3/4	3.0	1.5
1	3.0	1.5
1-1/4	3.0	1.5
1-1/2	3.0	1.5
2	3.0	1.5
2-1/2	3.0	1.5
3	4.5	1.5
3-1/2	6.0	3.0
4	6.0	3.0
5	6.0	3.0
6	6.0	3.0
8	8.0	4.5
10	8.0	4.5
12	8.0	4.5
14	8.0	4.5
16	10.0	4.5
18	12.0	6.0
20	12.0	6.0
22	12.0	6.0
24	12.0	6.0

Facing Types Of Class 300 LB Flanges

Type A: Flat Face (FF)
Type B: Raised Face (RF)
Type C: Tongue Face (TF)
Type D: Grooved Face (GF)
1Type E: Spigo
Type F: Recess
Type G: Ring Recess
Type H: O-Ring Groove

Class 300 Flange Weight

Normal Size Of Steel Pipe		Dimensions In Millimeter		ASME B16.5 Flanges Weight In Kilogram
Normal Size Of Steel Pipe In Inches	Size In Millimeter	Class 300 Flanges Outer Daimeter (O.D.) In (MM)	300# Flanges Wall Thickness Of (D) In M)	(Class 300 Slip On Flanges) (Class 300 Socket Weld Flanges)	(Class 300 Weld Neck Flanges)	(Class 150 Blind Flanges)
1/2	15	88.9	11.2	0.4	0.5	0.4
3/4	20	98.6	12.7	0.6	0.7	0.6
1	25	108	14.2	0.8	1	0.9
1 1/4	32	117.3	15.7	1	1.3	1.2
1 1/2	40	127	17.5	1.3	1.7	1.5
2	50	152.4	19.1	2.1	2.6	2.4
2 1/2	65	177.8	22.4	3.3	4.1	3.9
3	80	190.5	23.9	3.9	4.9	4.9
3 1/2	90	215.9	23.9	4.8	6.1	6.2
4	100	228.6	23.9	5.3	6.8	7.0
5	125	254	23.9	6.1	8.6	8.6
6	150	279.4	25.4	7.5	10.6	11.3
8	200	342.9	28.4	12.1	17.6	19.6
10	250	406.4	30.2	16.5	24	28.6
12	300	482.6	31.8	26.2	36.5	43.2
14	350	533.4	35.1	34.6	48.4	58.1
16	400	596.9	36.6	44.8	60.6	76.1
18	450	635	39.6	48.9	68.3	93.7
20	500	698.5	42.9	61.9	84.5	122.0

Manufacturer of ASME B16.5 Class 300 Threaded Flange and ANSI 300 LBS Spectacle Blind Flange in RJ, Groove, Raised, RTJ, Male, Flat, Female, Tongue face, check ansi 300 flange dimensions in mm and pressure rating

ANSI Class 300 Flange Pressure Rating

Temperature (in F°)	Class 300 Flange
100	740
200	680
300	655
400	635
500	605
600	570
650	550
700	530
750	505
800	410
850	320
900	230
950	135
1000	85

Manufacturer of DIN 24154/ DIN 86044 ASME 300 Flat Flanges and ANSI 300 LBS Puddle Flanges cutted from sheet, check flange dimensions 300

Class 300 Flange Pipe Schedule

Normal Size Of Steel Pipe	Outer Diameter (O.D.)	10 Schedule	20 Schedule	30 Schedule	STD Wall	40 Schedule	60 Schedule	EXT Hvy	80 Schedule	100 Schedule	120 Schedule	140 Schedule	160 Schedule	XX Hvy
½	0.84	0.083	...	...	0.109	0.109	...	0.147	0.147	...	...	...	0.188	0.294
¾	1.05	0.083	...	...	0.113	0.113	...	0.154	0.154	...	...	...	0.219	0.308
1	1.315	0.109	...	...	0.133	0.133	...	0.179	0.179	...	...	...	0.25	0.358
1 ¼	1.66	0.109	...	...	0.14	0.14	...	0.191	0.191	...	...	...	0.25	0.382
1 ½	1.9	0.109	...	...	0.145	0.145	...	0.2	0.2	...	...	...	0.281	0.4
2	2.375	0.109	...	...	0.154	0.154	...	0.218	0.218	...	...	...	0.344	0.436
2 ½	2.875	0.12	...	...	0.203	0.203	...	0.276	0.276	...	...	...	0.375	0.552
3	3.5	0.12	-	-	0.216	0.216	-	0.3	0.3	-	-	-	0.438	0.6
3 ½	4	0.12	-	-	0.226	0.226	-	0.318	0.318	-	-	-	-	0.636
4	4.5	0.12	-	-	0.237	0.237	-	0.337	0.337	-	0.438	-	0.531	0.674
5	5.563	0.134	-	-	0.258	0.258	-	0.375	0.375	-	0.5	-	0.625	0.75
6	6.625	0.134	-	-	0.28	0.28	-	0.432	0.432	-	0.562	-	0.719	0.864
8	8.625	0.148	0.25	0.277	0.322	0.322	0.406	0.5	0.5	0.594	0.719	0.812	0.906	0.875
10	10.75	0.165	0.25	0.307	0.365	0.365	0.5	0.5	0.594	0.719	0.844	1	1.125	1
12	12.75	0.18	0.25	0.33	0.375	0.406	0.562	0.5	0.688	0.844	1	1.125	1.312	1
14	14	0.25	0.312	0.375	0.375	0.438	0.594	0.5	0.75	0.938	1.094	1.25	1.406	-
16	16	0.25	0.312	0.375	0.375	0.5	0.656	0.5	0.844	1.031	1.219	1.438	1.594	-
18	18	0.25	0.312	0.438	0.375	0.562	0.75	0.5	0.938	1.156	1.375	1.562	1.781	-
20	20	0.25	0.375	0.5	0.375	0.594	0.812	0.5	1.031	1.281	1.5	1.75	1.969	-
22	22	0.25	-	-	0.375	-	-	0.5	-	-	-	-	-	-
24	24	0.25	0.375	0.562	0.375	0.688	0.969	0.5	1.219	1.531	1.812	2.062	2.344	-
26	26	-	-	-	0.375	-	-	0.5	-	-	-	-	-	-
30	30	0.312	0.5	0.625	0.375	-	-	0.5	-	-	-	-	-	-

Class 300 Flange Gasket Dimensions In Mm

(Normal Size Of Steel Pipes) In Inch	(I.D.) Inner Daimeter Gasket	(O.D.) Outer Daimeter Gasket
(Normal Size Of Steel Pipes) In Inch	(I.D.) Inner Daimeter Gasket	Class 150#/ LB	Class 300#/ LB	Class 400#/ LB	Class 600#/ LB	Class 900#/ LB
1/2	0.84	1.875	2.125	2.125	2.125	2.50
3/4	1.06	2.25	2.625	2.625	2.625	2.75
1	1.31	2.625	2.875	2.875	2.875	3.125
1 1/4	1.66	3	3.25	3.25	3.25	3.50
1 1/2	1.91	3.375	3.75	3.75	3.75	3.875
2	2.38	4.125	4.375	4.375	4.375	5.625
2 1/2	2.88	4.875	5.125	5.125	5.125	6.50
3	3.50	5.375	5.875	5.875	5.875	6.625
4	4.50	6.875	7.125	7.00	7.625	8.125
5	5.56	7.75	8.50	8.375	9.50	9.75
6	6.62	8.75	9.875	9.75	10.50	11.375
8	8.62	11	12.125	12.00	12.625	14.125
10	10.75	13.375	14.25	14.125	15.75	17.125
12	12.75	16.125	16.625	16.50	18.00	19.625

ASME B16.5 Class 300 Flange Size

Normal Pipe Size	DN
1/2	15
3/4	20
1	25
1 1/4	32
1 1/2	40
2	50
2 1/2	65
3	80
4	100

Torque Table For Class 300 Flange

Pipe Flange Size Inch	Pipe Flange Size MM	(Maximum) Radial Projection
Pipe Flange Size Inch	Pipe Flange Size MM	No Deeper Than the Bottom In Millimeter	Deeper Than the Bottom In Millimeter
1/2	15	3.0	1.5
3/4	20	3.0	1.5
1	25	3.0	1.5
1 1/4	32	3.0	1.5
1 1/2	40	3.0	1.5
2	50	3.0	1.5
2 1/2	65	3.0	1.5
3	80	4.5	1.5
3 1/2	90	6.0	3.0
4	100	6.0	3.0
5	125	6.0	3.0
6	150	6.0	3.0
8	200	8.0	4.5
10	250	8.0	4.5
12	300	8.0	4.5
14	350	8.0	4.5
16	400	10.0	4.5
18	450	12.0	6.0

Class 300 Flange Pressure Rating Stainless Steel