Manufacturers of Flat Face Flanges, Flat Face Flanges Manufacturers

We are engage in manufacturing and supplying Flat Face flange. We provide our clients with an extensive range of Flat Face flange. Our Flat Face flange is widely appreciated for its quality and performance. Flat Face flange we offers, are resistant to extreme temperature changes and are easy to install & use.

The flat face flange has a gasket surface in the same plane as the bolting circle face. Applications using flat face flanges are frequently those in which the mating flange or flanged fitting is made from a casting. Flat face flanges are never to be bolted to a raised face flange. ASME B31.1 says that when connecting flat face cast iron flanges to carbon steel flanges, the raised face on the carbon steel flange must be removed, and that a full face gasket is required. This is to keep the thin, bittle cast iron flange from being sprung into the gap caused by the raised face of the carbon steel flange.

½” (15 NB) to 60” (1500NB) in 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS ASA 150, ASA 300, PN 6,10,16,25, 40,64,100,160 ETC. available with NACE MR 01-75

½” (15NB) to 60” (1500NB)

Class / Pressure : 150#, 300#, 600#, 900#, 1500#, 2500# PN6, PN10, PN16, PN25, PN40, PN64

B16.5, BS4504, EN-1092, B16.36, B16.47, B16.48, MSS SP44

STD : ANSI Flanges, ASME Flanges, DIN Flanges, EN Flanges, BS Flanges, API, JIS, NACE etc.

Dimensional accuracy, Corrosion resistance, High efficiency, Excellent finish, Durable

Stainless Steel Flat Face Flanges :

Standard : ASTM / ASME A/SA 182
Grade : F 304, 304L, 304H, 309S, 309H, 310S, 310H, 316, 316TI, 316H, 316L, 316LN, 317, 317L, 321, 321H, 347, 347H, 904L

Duplex Steel Flat Face Flanges :

Standard : ASTM / ASME A/SA 182
Grade : F 44, F 45, F51, F 53, F 55, F 60, F 61

Aluminium Flat Face Flanges :

Standard : ASTM B247, B361.
Grade : 2024, 6061, 6063, 6101, 7075.

Titanium Flat Face Flanges :

Carbon Steel Flat Face Flanges :

Standard : ASTM A 105/A694/ A350 LF3/A350 LF2.
Grade : F42/46/52/56/60/65/70

Low Temperature Carbon Steel Flat Face Flanges :

Alloy Steel Flat Face Flanges :

Standard : ASTM A182
Grade : F1/F5/F9/F11/F22/F91

Copper Alloy Flat Face Flanges :

Nickel Alloy Flat Face Flanges :

Standard : ASTM / ASME SB 564 / 160 / 472
• Nickel 200 – UNS N02200   • Nickel 201 – UNS N02201   • Monel 400 – UNS N04400
• Monel K500 – UNS N05500   • Inconel K600 – UNS N06600   • Inconel 601 – UNS N06601
• Inconel 625 – UNS N06625   • Inconel 800 – UNS N08800   • Inconel 800H – UNS N08810
• Inconel 825 – UNS N08825   • Hastelloy C276 – UNS N10276   • Alloy 20 – UNS N08020

what is flat face flange

The Flat Face flange has a gasket surface in the same plane as the bolting circle face. Applications using flat face flanges are frequently those in which the mating flange or flanged fitting is made from a casting.

Flat face flanges are never to be bolted to a raised face flange. ASME B31.1 says that when connecting flat face cast iron flanges to carbon steel flanges, the raised face on the carbon steel flange must be removed, and that a full face gasket is required. This is to keep the thin, bittle cast iron flange from being sprung into the gap caused by the raised face of the carbon steel flange.

flat face flange Advantages

It will come as no surprise that flat faces has a flat surface. Forged steel flat face flanges are often found 150# and 300# ratings. Flat face flanges are used "are used on pump facings or on fiberglass flanges where the torque of compressing the gasket will damage the flange body" and on cast iron flanges sometimes found on mechanical equipment that can cause complications due to the brittle nature of cast iron. 

Difference between a RTJ(Ring Type Joint), FF(Flat Face), and RF(Raised Face)flange

The raised face, RF, is the standard process connection on our third party seals and thermowells. Both have options for a RTJ and FF type flange connections.  The Raised Face (RF) is the most common type used in process plant applications. The gasket surface of the flange is raised above the bolting circle face. A Ring-type Joint (RTJ) can also have a raised gasket face with the difference being the ring groove machined in this face. This groove will accommodate a steel ring gasket for flange mating. The Flat Face, FF, flange has a gasket surface that is in the same plane as the bolting circle face. None of these three flange types are interchangeable between types, i.e. RTJ flange cannot be mated to a RF flange.

150 Flat Face Flange

Flat Face flanges, steel Flat Face flanges are available with following specifications:

We proffer Flat Face Flange pipe flanges that are being manufactured at our best services to companies in a range of industries including power generation, shipbuilding, petrochemical plants, waste water treatment plants, oil refineries, paper mills, turnkey projects and pharmaceutical plants among others.

1. Type: 150 Flat Face Flange
2.Size: 1/2"-56"
3.Material:C22.8
4.Surface:Anti-rust Oil
5.Standard:ANSI B16.5

Dimension and weight of DIN2503 PN40 Flat Flange

ansi b16.5 flat face flange, flat face flange b16.5

1.Size:1/2"-48"(seamless),40"-80"(welded) 

2. Wall thickness: class 150 300 600 900 1500 2500

3.Type: PL(plate flange) ,SO(slip on flange). WN(welded neck flange) , BL(blind flange ),THDF(threaded flange), SWF(socket flange ), LJF(lapped joint flange),8F(spectacle blind )

Sealing face:FF(flat face)  RF(raised face)  RJ(ring joint face)

4.Standard: 

ASME B16.5, ASME B16.47, B16.48, MSS SP-44 DIN2573, DIN2577, JIS B2220 BS3293, BS4054,GB/T9112, EN1092,ISO7005 

Pipe fittings can also be specially manufactured according to customers’ drawings. 

5.Material: 

ASTM SA105/SA105N,RST37.2, A181

ASTM A182 F1,F12,F11,F22,F5,F9,F91 

ASTM A350 LF3 LF6 LF9 

ASTM A182 WP304,WP304L,WP316,WP316L 

ASTM A694 F42 F46 F52 F56 F60 F65 F70 F80 

6.Surface treatment:black, yellow paint, rust-proof oil,galvanized

7.Packing:Fumigation-free Wooden Cases/ Pallets or according to customers’ requirment

Port of loading: Xin Gang ,Tianjin ,China. 

8.Others:(1).Special design available according to requirement. 

(2).Anti-corrosion and high-temperature resistant. 

(3).The whole production process is under the ISO9001:2001 strictly

Flat Face Flange price list

ansi b16.5 bw 150 flat face flange
US $0.1-300 / Piece

DIN stainless steel flange flat face flange PN6
US $0.8-1000 / Piece

ANSI B16.5 weld neck flat face flange with price and quality
US $2-700 / Piece n

(FF )weld neck flat face flange
US $1-100 / Piece

Types of Flat Face Flange, Flat Face flanges Types