Flanges manufacturer In India and Type Of Steel Forging Flange

Check Schedule 40 Pipe Flanges Dimensions Chart/ Pressure Rating/ Weight/ Bolt Size And Price List Ex Mumbai

Flanges are used to connect 2 pipes or tubes with the help of bolts, nuts, and gaskets. They are produced using different materials and in different types by Flange Manufacturer In Mumbai. Stainless steel and carbon steel are Flange Materials used to manufacture different types of flanges such as socket weld flange, weld flange, blind flange, and so on. Pipe Flange having these types of connections allow ease of dismantling, for repair and maintenance purpose. There is various other Type Of Flange used for commercial, industrial, and institutional purposes.

Moreover, the other type of Industrial Flange manufactured by us include.

A closet flange is used to connect the toilet commode to the floor and to connect the closet bend to the drain pipe.
Companion Flange is a type of pipe flange that is threaded internally to receive a pipe and bolt it to another flange.
A blank Flange is also known as a blind flange that is used to terminate or end a pipe connection.
An exhaust Flange is used to connect the exhaust pipe together along with a set of bolts and an exhaust gasket.
Girth Flange is used to mate 2 segments of pressure vessels and is widely used in shell and tube heat exchangers.
ISO Flange has a counterbore that helps it to receive a metal centering ring with an elastomeric o-ring. Due to the large diameter, the flange can roll off and is hence held by a spring loaded retainer.
Metal Flange has a face and bend that is connected to an existing face. They specify a set of options that determine the size and position of the material.
Quick Flange is a patented technology that is used in enhancing the pipeline's integrity and flow. They are said to be high in performance and are weldless.
Split Flange is made up of 2 parts and provides ease of installation on an existing pipe. They are used to strengthen the weak areas of the pipe.
Swivel Flange is a type of weld neck flange that has an inner ring that can be rotated for 360 degrees for aligning bolt holes with standard flange.

The above mentioned types of flanges are used for specific applications. However, every application requires the Correct Flange Size to work efficiently. One of the advantages of this 2 Inch Flange is that a small section of the pipe can be removed and inspected. The Industry Standard Flange Dimensions are the same all over the world. This assists in smooth operation and repair work of 4 Inch Flange. These different types of flange that are used in various applications are manufactured using various techniques and machines by 3 Inch Flanges manufacturers In India.

We at Fastwell provide Industrial Pipe Flange that can be used in commercial as well as domestic use. The dimensions of these flanges are mentioned in Industrial Flange Bolt Chart. The outside diameter, bolt diameter, thickness, and a number of bolts are considered in Industrial Flange Dimensions. We have been producing Flanges For The Oil Industry, chemical, and fertilizer industry for quite some time now. We supply these Industry Standard Class 175 Flange to various companies in different countries. Our affordable Industry Standard Flange are well known for their quality. We are one of the well known Flange Supplier In Mumbai.

Flange Types

Blind Flange

One such type of flanges is the Blind Flange that is used to end a pipe in the piping system. A Stainless Steel Blind Flange does not have a center or a bore. ANSI B16.5 BLRF Flanges is used to seal a nozzle opening of a pressure vessel. A Blank Flanges provides easy access to the interior of the vessel since it is bolted.

Slip On Flange

They are a type of ring that is placed on the end of the pipe with the face of the flange facing the pipe at a distance to apply weld. Slip On Flanges manufacturer In India also welds the outer diameter on the backside of the flange.

Reducing Flange

Reducing Flange are used to connect 2 pipes or tubes of the same or different diameters. The flanges that are used to connect pipes of different diameters are known as Reducing Flanges. The flanges of a Reducing Flanges is of specific diameter however the bore is of a reducing diameter.

Weld Neck Flange

Weld Neck Flange that is recognized by its long tapered hub that goes towards the wall thickness. Due to the welded neck of the WN Flanges, they are used in applications with high pressure, high temperature, along with the ones that work in sub zero temperature.

Threaded Flange

One such type is the Threaded Flange. Special circumstances demand the use of these Threaded Flange since they can be attached to the pipe without welding. Threaded Pipe Flanges at times can be welded if the circumstance demand so. Threaded Flanges is not suitable for walls that have thin thickness.

Lap Joint Flange

Lap Joint Flange is used in conjunction with the lap joined stub ends. Weld Bend Lap Joint Flange is similar to slip on flange with the exception of 2 things.

Socket Weld Flange

Flange are used to connect or terminate the pipes in a particular piping system. They are available in various forms one such type is Socket Weld Flange. They were initially developed to be used in high pressure pipes that are small in size.

Flange Dimensions

EN 1092-1 Flange

EN 1092-1 Flange is one such type of flange that is has a raised face and is 160 mechanically turned. The nominal pressure of these EN 1092-1 PN 16 Flanges is equivalent to the number of bars. For example, the cold working pressure of EN 1092-1 PN 10 Flanges is 10 bars and that of ON40 is 40 bars.

EN 1092-2 Flange

EN 1092-2 Flanges that has dimensions depending upon various factors such as nominal diameter, outside diameter, the diameter of bolt circle, and bolt hole.

API Flange

API Flange has dimensions based on outer diameter, thickness, and nominal size and is measured in inches. API Flanges is used to block off a section of the pipe. They are used in industries such as oil, natural gas, petroleum pipeline, and gas explosives.

DIN 2501 Flange

DIN 2501 Flange is one such standard that is used to produce various types of flanges such as weld neck, socket weld, and so on. DIN 2501 Pn16 Flanges manufacturer In India divides the dimensions of these flanges into various parameters such as the thickness of the flanges, flanges diameter, diameter of bolt circle, and pipe.

DIN 2527 Flange

DIN 2527 Flange can be used at a maximum temperature of 120 degrees C along with a working pressure of 16 bars. The yield point of these bars may become lower in case the temperature range exceeds 120 degrees C and hovers between 120 and 300 degrees C.

DIN 2561 Flange

DIN 2561 Flange is one such type of flange that displays tolerance to severe temperature and pressure. They can be identified due to their long hubs that protrude. As per DIN 2561 Blind Flanges manufacturer In India, these hubs provide support to the pipe in high temperature and pressure systems that might hamper the efficiency due to bending.

P235GH Flange

One of these flanges is the P235GH Flange. To get more grip on the surface attachment these flanges have a collar. This helps them to get a grip even on the other flange and fitting.

Industry Standard Flange Pressure Rating

Class 150 Flanges

Class 300 Flanges

Pipe Flanges Service Ratings And Classification

This is designated using a number and either like:

“#”
“lb”
“class”

Common Indian Standard Flange Classifications

150#
300#
400#
600#
900#
1500#
2500#

Class 150 Flanges

Class 150 Flanges is made up of cast or forged material. Each class has a specific pressure and temperature rating. For instance, 3 Inch Class 150 Flanges at ambient temperature is rated at 270 Psig, and 180 Psig at 400 degrees F. ANSI B16.5 150 Flange at 600 degrees F is said to have 150 Psog and at 800 degrees F is said to have 75 Psig.

Class 300 Flanges

Class 300 Flanges is used in power generation, petrochemical, construction, gas, and petroleum industries. Furthermore, these 300lb Series Series B Flanges are also used in metallurgy, shipbuilding, heavy oil refineries, and nuclear power equipment.

Flange Face Types

Ring Type Joint Flange

Ring Type Joint Flanges is a metallic ring that has a groove cut into its face. When the connecting bolts of ASME B16.5 RTJ Flanges are tightened this ring gets pressed. RTJ Flanges are used in services with high working temperatures and pressure. The pressure class rating of these flange ranges between 150 to 2500. These flanges have the potential to form cracks at the intersection of the sides and bottom of the groove.

Other Flange Facing Type And Finish

Flat Face Flange (FF)
Raised Face Flange (RF)
Tongue and Groove Flange (T&G)
Male And Female Flange (M&F)

Flanges Used In Oil And Gas Industry

Stainless Steel

Carbon Steel

Alloy Steel

Nickel Alloy

IBR And EIL Approved

Duplex & Super Duplex

Titanium

Copper Nickel

All Types Of MSS SP-44 Metal Flanges manufacturer In Mumbai, PN16 UNI Flange Available In Class 150 to 2500# Pressure Class. Buy SCH 80 Square Flanges At An Affordable Price

Pipe Flange Price In India

Type Of Flanges	Size	SCH	Class	Material	Price In INR (India) Per Piece
Blind Flange	3/4	SCH 40	150	Stainless Steel 304	150.00
Blind	1"	SCH 40	150	-	248.00
Blind	1-1/2"	SCH 40	150	-	399.00
Blind	2"	SCH 40	150	-	523.00
Blind	3"	SCH 40	150	-	650.00
Blind	4"	SCH 40	150	-	968.00
Weld Neck Flange	1/3"	SCH STD	150	-	274.00
Weld Neck	1"	SCH STD	150	-	389.00
Weld Neck	2"	SCH STD	150	-	635.00
Weld Neck	3"	SCH STD	150	Stainless Steel 304	847.00
Weld Neck	4"	SCH STD	300	-	944.00
Weld Neck	6"	SCH 80	300	-	1199.00
Slip On Flange	3/4"	SCH 40	150	-	184.00
Slip On	1"	SCH 40	150	-	294.00
Slip On	2"	SCH 40	150	-	403.00
Slip On	3"	SCH 40	150	Stainless Steel 304	350.00
Slip On	4"	SCH 40	150	-	533.00
Slip On	6"	SCH 40	150	-	873.00
Slip On	8"	SCH 80	300	-	1342.00
Socket Weld Flange	3/4"	SCH XS	150	Stainless Steel 304	183.00
Socket Weld	1"	SCH XS	150	-	245.00
Socket Weld	1-1/2”	SCH XS	150	-	399.00
Socket Weld	1”	SCH XS	150	-	500.00
Socket Weld	2”	SCH XS	150	Stainless Steel 304	649.00

Many Flanges manufacturer In India And Indian Standard Flanges wholesalers, dealers, supplier, importers, retailers, exporters, stockists, stockholders, and distributors choose us for the best price of 2 Inch Flange in Mumbai, Find your sizes in our stock of 3 Inch Flange in Mumbai, Contact for a Quick Quote!. For final Industrial Flange Price List Please Call on +91-9987870874 or drop an Email to info@fastwell.in.

We Keep Bulk Stock Of 2 And 4 Inch Flange Types, Contact Us For Class 300 Industrial Steel Flanges Free Sample And Specification List. Flanges manufacturer In India

Flange Material Specifications

Manufacturer Specification	Flanges
Manufacturer Length	NPS 1⁄₂" To NPS 48”
High Temperature	(Maximum) 200°C (400°F) For Class 150
Flanges Face Type	RTJ/ FF/ RF/ lap joint/ Male And Female (M&F)/ Tongue And Groove (T&G).
Mimimum Thickness	NPS (Normal Pipe Size) ≤ 18
Other Type Of Flange	Closet Flanges/ Companion Flanges/ Correct Flanges/ Pipe Flanges/ Blank Flanges/ Exhaust Flanges/ Girth Flanges/ ISO Flanges/ Metal Flanges/ Quick Flanges/ Split Flanges/ Swivel Flanges
Fastweel Manufacturer Type Of Industrial flanges	Socket Weld/ RTJ/ Lap Joint/ Threaded/ Blind/ Slip On/ Weld Neck/ Reducing
Manufacturing Material	Duplex Steel, Super Duplex, Incoloy, Alloy 20, Copper, Carbon Steel, Nickel Alloys, Tantalum, Cupro-Nickel Inconel, Monel, Titanium, Hastalloy, Alloy Steel, Stainless Steel, Brass, Bronze
Flange Methods	Forging/ Casting/ Rolling And Cutting
Manufacturer Pressure Class	Class 150 To Class 2500
Available Schedule	SCH 5S/ SCH 10/ SCH 40/ SCH 80/ SCH 120/ SCH 160/ SCH 180 To XXS
Dimensions & Standard	EN 1092-1/ EN 1092-2/ API/ DIN 2501/ DIN 2527/ DIN 2561/ P235GH

Steel Pipe Flange Weights

Nominal Pipe Size For (NPS)	Slip On (SORF)	Threaded (NPT)	Socket Weld (SWRF)	Lap Joint (Loose)	Blind (BLRF)	Weld Neck (WNRF)
½	1	1	2	1	2	2
¾	2	2	2	2	2	2
1	2	2	2	2	2	3
1¼	3	3	3	3	3	3
1½	3	3	3	3	4	4
2	5	5	5	5	5	6
2½	8	8	8	8	7	10
3	9	9	9	9	9	11.5
3½	11	12	11	11	13	12
4	13	13	13	13	17	16.5
5	15	15	15	15	20	21
6	19	19	19	19	27	26
8	30	30	30	30	47	42
10	43	43	43	43	70	54
12	64	64	64	64	123	88
14	90	90	90	105	140	114
16	106	98	98	140	180	140
18	130	130	130	160	220	165
20	165	165	165	195	285	197
22	185	185	185	245	355	225
24	220	220	220	275	430	268

4 Inch Industrial Flange Bolt Chart

Flange Marking

These markers also follow a strict order:

ASTM material code
Material Grade
Size
Heat Number
Pressure-temperature Class
Schedule (Thickness)
Manufacturer logo or code

Correct Flange Size

(NPS) For Nominal Pipe Size In (inches)	As Per ASME B16.5 Class 150
(NPS) For Nominal Pipe Size In (inches)	Flange Diameter In (inch)	Bolts Number	Bolt Diameter In (inch)	Bolt Holes (B.H.) Diameter In (inch)	Bolt Circle (B.C.) In(inch)
1/4	3-3/8	4	1/2	0.62	2-1/4
1/2	3-1/2	4	1/2	0.62	2-3/8
3/4	3-7/8	4	1/2	0.62	2-3/4
1	4-1/4	4	1/2	0.62	3-1/8
1-1/4	4-5/8	4	1/2	0.62	3-1/2
1-1/2	5	4	1/2	0.62	3-7/8
2	6	4	5/8	0.75	4-3/4
2-1/2	7	4	5/8	0.75	5-1/2
3	7-1/2	4	5/8	0.75	6
3-1/2	8-1/2	8	5/8	0.75	7
4	9	8	5/8	0.75	7-1/2
5	10	8	3/4	0.88	8-1/2
6	11	8	3/4	0.88	9-1/2
8	13-1/2	8	3/4	0.88	11-3/4
10	16	12	7/8	1	14-1/4
12	19	12	7/8	1	17
14	21	12	1	1.12	18-3/4
16	23-1/2	16	1	1.12	21-1/4
18	25	16	1-1/8	1.25	22-3/4
20	27-1/2	20	1-1/8	1.25	25
24	32	20	1-1/4	1.38	29-1/2

Test Certificates

Raw Materials Certificate
EN 10204/3.1B,
Third Party Inspection Repor
100% Radiography Test Report

Value Added Services

Hardness Test
Chemical Equipment
Flattening Test
Mechanical Testing Such as Tensile of Area
Pitting Resistance Test

Positive Material Identification – PMI Testing
Micro and MacroTest
Chemical Analysis – Spectro Analysis
Intergranular Corrosion (IGC) Test

Exhaust Flange Gasket Size Chart

NPS For (Normal Pipe Size)	Gasket (I.D.) Inside Daimeter	Gasket (O.D.) Outside Daimeter
NPS For (Normal Pipe Size)	Gasket (I.D.) Inside Daimeter	#150LB	#300LB	#400LB	#600LB	#900LB
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

exporter And supplier Of Forged Flanges And Plate Flange As Per ASME/ ANSI B16.5/ EN 1092-1/ AWWA C207 Standards, Always Refer Steel Forging Flange Thickness Chart. Flanges manufacturer In India

Documentation

Fumigation Certificates
Guarantee Letter
Raw Material Test Reports
Fumigation Certificates

Heat Treatment Charts
Commercial Invoice which includes HS Code
QAP (Quality Assurance Plan)
NABL approved Laboratory Test Reports

List Of Machineries

Tee Beveling Machine
CNC Lath
Oil Fired Heat Treatment Furnace
Hydraulic Press 300 Tons Capacity
Radial Driling Machine
Elbow Beveling Machine

Conventional Machine
Tee Cold Forming Machines
Elbow Cold Forming Machines
Heat Treatment For Forged Fittings
Hydraulic Press 150 Tons Capacity
Portable Temperature Indicator

ASME Flange Face Types

Types of Flange Faces	DIN And EN 1092-1
Without (RF) Raised Face	Form A
(RF) For Raised Face	Form B1
(RF) For Raised Face	Form B1
(RF) For Raised Fac	Form B2
DIN2512 Tongue	Form C
DIN 2512 Groove	Form D
DIN 2513 Male	Form E
DIN 2513 Female	Form F

3 Inch Flange Advantages

Flanges For The Oil Industry	Check Pressure Class Of Pipe Flanges	NPS List	Advantages & Applications
Slip On Flanges	Low Pressure	All	Simple Installation/ Low Price/ Easy To Use
Blind Flanges	Very High Pressure	All	Pressure Testing/ Connected To Closing Pipe And Valve/ Low Price/ Easy Installation
Socket Weld Flanges	High Pressure	Small	SW Flanges For ; Smooth Bore And Better Fluid Flow
Threaded Flanges	Low Pressure	Small	Threaded Flanges (NPT/ BSP): Bore Which Matches An External Thread On The Pipe
Lap Joint Flanges	Low Pressure	All	Lap Joint Flanges Have A Long Neck And Stub End That Is Welded To The Pipe
Weld Neck Flanges	High Pressure	All	WN Flange use Conditions Are Critical And Severe.

Flanged Connection Types

A typical pipe flanges connection is comprised of 3 parts:

Pipe Flanges
Bolting
Gasket

Functional Design Of 2 Inch Flange

Outside diameter (O.D.)
Thickness (TK)
Bolt circle diameter (B.C.)
Pipe size (NPS)
Nominal bore size (NBS)
Inside diameter (I.D.)

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Pitch Circle Diameter Of Flange

NPS Nominal Pipe Size(inch)	Class 150 Flanges
NPS Nominal Pipe Size(inch)	Dia. of Flanges (inch)	Number of Bolt	Dia. of Bolt (inch)	Dia. of Bolts Holes (B.H.) (inch)	Bolt Circle (B.C.) (inch)
1/4	3-3/8	4	1/2	0.62	2-1/4
1/2	3-1/2	4	1/2	0.62	2-3/8
3/4	3-7/8	4	1/2	0.62	2-3/4
1	4-1/4	4	1/2	0.62	3-1/8
1-1/4	4-5/8	4	1/2	0.62	3-1/2
1-1/2	5	4	1/2	0.62	3-7/8
2	6	4	5/8	0.75	4-3/4
2-1/2	7	4	5/8	0.75	5-1/2
3	7-1/2	4	5/8	0.75	6
3-1/2	8-1/2	8	5/8	0.75	7
4	9	8	5/8	0.75	7-1/2
5	10	8	3/4	0.88	8-1/2
6	11	8	3/4	0.88	9-1/2
8	13-1/2	8	3/4	0.88	11-3/4
10	16	12	7/8	1	14-1/4
12	19	12	7/8	1	17
14	21	12	1	1.12	18-3/4
16	23-1/2	16	1	1.12	21-1/4
18	25	16	1-1/8	1.25	22-3/4
20	27-1/2	20	1-1/8	1.25	25
24	32	20	1-1/4	1.38	29-1/2

1 inch = 25.4 Millimeter

NPS For (Nominal Pipe Size)(Inch)	Class 300 Flanges
NPS For (Nominal Pipe Size)(Inch)	Dia. of Flanges (Inch)	No. of Bolt	Dia. of Bolt (Inch)	Dia. of Bolts Holes For (B.H.) (Inch)	Bolts Circle For (B.C.) (Inch)
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

NPS For (Nominal Pipe Size) (Inche)	Class 400 Flanges
NPS For (Nominal Pipe Size) (Inche)	Dia. of Flange (Inche)	Number of Bolts	Dia. of Bolt In (Inche)	Dia. of Bolts Holes (B.H.) In (Inche)	Bolts Circle (B.C.) in (Inche)
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	7/8	1	7-1/4
4	10	8	7/8	1	7-7/8
5	11	8	7/8	1	9-1/4
6	12-1/2	12	7/8	1	10-5/8
8	15	12	1	1.12	13
10	17-1/2	16	1-1/8	1.25	15-1/4
12	20-1/2	16	1-1/4	1.38	17-3/4
14	23	20	1-1/4	1.38	20-1/4
16	25-1/2	20	1-3/8	1.5	22-1/2
18	28	24	1-3/8	1.5	24-3/4
20	30-1/2	24	1-1/2	1.62	27
24	36	24	1-3/4	1.88	32

NPS For (Nominal Pipe Size) (inch.)	Class 600 Flanges
NPS For (Nominal Pipe Size) (inch.)	Dia. of Flanges (inch.)	Number of Bolts	Dia. of Bolts in (inch.)	Dia. of Bolts Holes (B.H.) (inch.)	Bolts Circle (B.C.) (inch.)
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	7/8	1	7-1/4
4	10-3/4	8	7/8	1	8-1/2
5	13	8	1	1.12	10-1/2
6	14	12	1	1.12	11-1/2
8	16-1/2	12	1-1/8	1.25	13-3/4
10	20	16	1-1/4	1.38	17
12	22	20	1-1/4	1.38	19-1/4
14	23-3/4	20	1-3/8	1.5	20-3/4
16	27	20	1-1/2	1.62	23-3/4
18	29-1/4	20	1-5/8	1.75	25-3/4
20	32	24	1-5/8	1.75	28-1/2
24	37	24	1-7/8	2	33

NPS For (Nominal Pipe Size)(inches)	Class 900 Flanges
NPS For (Nominal Pipe Size)(inches)	Dia. of Flanges (inches)	No. of Bolts	Dia. of Bolt in (inches)	Dia. of Bolts Holes (B.H.) In (inches)	Bolts Circles (B.C.) (inches)
1/2	4-3/4	4	3/4	0.88	3-1/4
3/4	5-1/8	4	3/4	0.88	3-1/2
1	5-7/8	4	7/8	1	4
1-1/4	6-1/4	4	7/8	1	4-3/8
1-1/2	7	4	1	1.12	4-7/8
2	8-1/2	8	7/8	1	6-1/2
2-1/2	9-5/8	8	1	1.12	7-1/2
3	9-1/2	8	7/8	1	7-1/2
4	11-1/2	8	1-1/8	1.25	9-1/4
5	13-3/4	8	1-1/4	1.38	11
6	15	12	1-1/8	1.25	12-1/2
8	18-1/2	12	1-3/8	1.5	15-1/2
10	21-1/2	16	1-3/8	1.5	18-1/2
12	24	20	1-3/8	1.5	21
14	25-1/4	20	1-1/2	1.62	22
16	27-3/4	20	1-5/8	1.75	24-1/2
18	31	20	1-7/8	2	27
20	33-3/4	20	2	2.12	29-1/2
24	41	20	2-1/2	2.62	35-1/2

NPS For (Nominal Pipe Size)(Inche)	Class 1500 Flanges
NPS For (Nominal Pipe Size)(Inche)	Diameter of Pipe Flanges (Inche)	Bolts of No.	Bolts Diameter (Inche)	Bolt Holes (B.H.) Diameter (Inche)	(B.C.) For Bolts Circle (Inche)
1/2	4-3/4	4	3/4	0.88	3-1/4
3/4	5-1/8	4	3/4	0.88	3-1/2
1	5-7/8	4	7/8	1	4
1-1/4	6-1/4	4	7/8	1	4-3/8
1-1/2	7	4	1	1.12	4-7/8
2	8-1/2	8	7/8	1	6-1/2
2-1/2	9-5/8	8	1	1.12	7-1/2
3	10-1/2	8	1-1/8	1.25	8
4	12-1/4	8	1-1/4	1.38	9-1/2
5	14-3/4	8	1-1/2	1.62	11-1/2
6	15-1/2	12	1-3/8	1.5	12-1/2
8	19	12	1-5/8	1.75	15-1/2
10	23	12	1-7/8	2	19
12	26-1/2	16	2	2.12	22-1/2
14	29-1/2	16	2-1/4	2.38	25
16	32-1/2	16	2-1/2	2.62	27-3/4
18	36	16	2-3/4	2.88	30-1/2
20	38-3/4	16	3	3.12	32-3/4
24	46	16	3-1/2	3.62	39

NPS For (Nominal Pipe Size)(Inch)	Class 2500 Flanges
NPS For (Nominal Pipe Size)(Inch)	Flange Diameter (Inch)	Bolts No.	Bolts Diameter (Inch)	Bolt Holes Diameter (Inch)	Bolts Circle In (Inch)
1/2	5-1/4	4	3/4	0.88	3-1/2
3/4	5-1/2	4	3/4	0.88	3-3/4
1	6-1/4	4	7/8	1	4-1/4
1-1/4	7-1/4	4	1	1.12	5-1/8
1-1/2	8	4	1-1/8	1.25	5-3/4
2	9-1/4	8	1	1.12	6-3/4
2-1/2	10-1/2	8	1-1/8	1.25	7-3/4
3	12	8	1-1/4	1.38	9
4	14	8	1-1/2	1.62	10-3/4
5	16-1/2	8	1-3/4	1.88	12-3/4
6	19	8	2	2.12	14-1/2
8	21-3/4	12	2	2.12	17-1/4
10	26-1/2	12	2-1/2	2.62	21-1/4
12	30	12	2-3/4	2.88	24-3/8