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| Brand Name: | Jinxi Pipe |
| Model Number: | Flange |
| MOQ: | 1 |
| Payment Terms: | L/C,D/A,D/P,T/T,Western Union,MoneyGram |
| Supply Ability: | 100000 |
Flange Type:Weld neck flange, slip on flange, blind flange, threaded flange, socket weld flange, plate flange, spectacle blind, LWN, Orifice flange, anchor flange etc.
Size: OD: DN15- DN2000 (1/2''- 80'') and customized
Type: welding neck, slip on, blind, socket welding, threaded, lap-joint
Pressure:150#, 300#, 600#,900#,1500#, 2500#,PN10,PN16,PN25,PN40;JIS 5K,JIS 10K;
Material:
Other materials: copper steel;Titanium steel;Aluminium steel etc
Coating: Rust-proof oil, cold and hot galvanize and customized
Packing: Sea worthy plywooden case, wooden pallet
Types of Pipe Flanges
There are several types of pipe flanges in a piping system; but there are 6 main types – blind, lap joint, slip on, socket weld, threaded and weld neck. Each of them has properties that determine their use in commercial, industriall and institutional applications.
Blind flanges
No center hole and are used to seal off a piping system. As a result, one can easily execute pressure tests cost effectively.
Use a stub end (Type A, B or C) and slide over the pipe. They are also known as loose-ring flanges and back-up flanges. Lap joint is used with lapped pipe and allow for frequent cleaning and inspection through dismantling. They are very durable and can be used because the fluid conveyed in the system does not come in contact with the flange.
Also known as hubbed flanges, are thinner than other flanges and are traditionally used in low pressure systems. This type slips onto the pipe and the fillet weld is applied at both the top and bottom of the pipe flange. These welds provide extra strength and prevent leakage. While the installation is low cost and easy, the welding does add cost to its installation.
Designed for small size, high-pressure piping systems that do not carry corrosive fluids. The pipe is inserted into the socket and a single fillet weld on the outside of the flange is applied.
Used in applications that are low pressure on smaller, thick walled pipes. Given their threaded connection, they do make it easy to disconnect the piping system.
Have a long neck that is butt welded to pipe. This type is also known as a weld bend flange. Since the bore of the neck matches that of the pipe, it reduces erosion and turbulence.
There are other types of flanges including: orifice, reducing, ductile iron backup, copper solder joint and many more.
Flange facing
There are three primary types of flange facings. Not all facings are available with each end connection. This is based on the design of the flange and design of the piping system.
Raised Face Flanges (RF)
Flat Face Flanges (FF)
Ring Type Joint Flanges (RTJ)
Flange pressure classes
Flanges are normally manufactured in seven basic ratings: 150 Lb, 300 Lb, 400 Lb, 600 Lb, 900 Lb, 1500 Lb and 2500 Lb. The ratings can be expressed in different ways but mean the same thing - 150 Lb, 150 Lbs, 150# or Class 150.
Applications of Pipe Flanges
| Type | Traditionally Used In |
| Blind | Creating piping system access points |
| Permanent seal to a piping system | |
| Pipe pressure testing | |
| Temporary seal for system repairs | |
| Lap Joint/Loose Ring | Frequent dismantling for maintenance |
| Low-pressure applications | |
| Slip-On/Hubbed | Cooling water lines |
| Firefighting water lines | |
| Oil, gas & steam process lines | |
| Socket Weld | Hydraulic pipes |
| Threaded | Applications that are flammable, hazardous, or explosive & cannot be welded due to safety concerns |
| Restricted space where welding is not feasible | |
| Small pipe sizes | |
| Weld Neck/Weld Bend | Conveyance of volatile and hazardous fluids |
| Piping systems with bends that are repeating | |
| System conditions that have wide fluctuations in pressure & temperature |
Standard of Flange (Material)
| Standard | Specification |
| ASTM A105 | Standard Specification for Carbon Steel Forgings for Piping Applications |
| ASTM A350 | Standard Specification for Carbon and Low-Alloy Steel Forgings, Requiring Notch Toughness Testing for Piping Components |
| ASTM A182 | Standard Specification for Forged or Rolled Alloy and Stainless Steel Pipe Flanges, Forged Fittings, and Valves and Parts for High-Temperature Service |
| ASTM A404 | Specification for Forged or Rolled Alloy Steel Pip Flanges, Forged Fittings, and Valves and Parts Specially Heat Treated for High-Temperature Service (Withdrawn 1974) |
| ASTM A234 | Standard Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Moderate and High Temperature Service |
| ASTM A420 | Standard Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Low-Temperature Service |
| ASTM A403 | Standard Specification for Wrought Austenitic Stainless Steel Piping Fittings |
| ASTM A694 | Standard Specification for Carbon and Alloy Steel Forgings for Pipe Flanges, Fittings, Valves, and Parts for High-Pressure Transmission Service |
Standard of Flange (Size)
| Material | Standard |
| Carbon Steel | ASTM /ASME A/SA105(N), A350 LF2/LF3, A694 F52, F56, F60, F65, F70 |
| Alloy Steel | ASTM/ASME A/SA 182 F5, F9, F11, F22, F91 |
| Stainless Steel | ASTM/ASME A/SA 182 F304, 304L, 304H, 310H, 316, 316H, |
| 316L, 316LN, 316Ti, 317, 317L, 321, 321H, 347, 347H, 904L | |
| Duplex and | ASTM/ASME A/SA 182 F44, F45, F51, F53, F55, F60, F61, |
| Super Duplex | S31803, S32205, S32550, S31254, SMO254, S32750, S32760, S32950 |
| Nickel Alloy Steel | ASTM/ASME B/SB 564 UNS N02200(NICKEL 200), UNS N04400, (MONEL 400) |
| UNS N08825( INCOLOY 825), UNS N06600(INCONEL 600), UNS N06601(INCONEL 601), | |
| UNS N06625(INCONEL 625), UNS N10276(HASTELLOY C276) | |
| ASTM/ASME B/SB160 UNS N02201(NICKEL 201), ASTM B/SB472 UNS N08020(Alloy 20) | |
| Copper Alloy | ASTM/ASME B/SB151 UNS N07060, 71500, C70600(CuNi 90/10), C71500(CuNi 70/30) |
| Titanium | ASTM/ASME B/SB381 Grade 2, Grade 5, Grade 7 |
Specification & Size of Pipe Flanges
| CLASS 150 According to ASTM A/SA-105; ANSI B16.5 | ||||||||||||
| Nominal | Outside | Thick. | Diam. | Diam. | Length | Min. | Min. | No. of | Diam. of | Diam. of | Diam. | Approx. |
| Pipe | Diam. of | of | of | of Hub | thru Hub | Thread | Counter | Holes | Holes | Bolts | of Bolt | Weight |
| Size |
Flange (O) |
Flange (C) |
Raised Face (R) |
at Base (X) | (Y) | Length (T) |
Bore (Q) |
Circle | (in Pounds) | |||
| ½ | 3.5 | 0.44 | 1.38 | 1.19 | 0.62 | 0.62 | - | 4 | 0.62 | 0.5 | 2.38 | 1 |
| ¾ | 3.88 | 0.5 | 1.69 | 1.5 | 0.62 | 0.62 | - | 4 | 0.62 | 0.5 | 2.75 | 2 |
| 1 | 4.25 | 0.56 | 2 | 1.94 | 0.69 | 0.69 | - | 4 | 0.62 | 0.5 | 3.12 | 2 |
| 1 ¼ | 4.62 | 0.62 | 2.5 | 2.31 | 0.81 | 0.81 | - | 4 | 0.62 | 0.5 | 3.5 | 3 |
| 1 ½ | 5 | 0.69 | 2.88 | 2.56 | 0.88 | 0.88 | - | 4 | 0.62 | 0.5 | 3.88 | 3 |
| 2 | 6 | 0.75 | 3.62 | 3.06 | 1 | 1 | - | 4 | 0.75 | 0.62 | 4.75 | 5 |
| 2 ½ | 7 | 0.88 | 4.12 | 3.56 | 1.12 | 1.12 | - | 4 | 0.75 | 0.62 | 5.5 | 7 |
| 3 | 7.5 | 0.94 | 5 | 4.25 | 1.19 | 1.19 | - | 4 | 0.75 | 0.62 | 6 | 8 |
| 3 ½ | 8.5 | 0.94 | 5.5 | 4.81 | 1.25 | 1.25 | - | 8 | 0.75 | 0.62 | 7 | 11 |
| 4 | 9 | 0.94 | 6.19 | 5.31 | 1.31 | 1.31 | - | 8 | 0.75 | 0.62 | 7.5 | 13 |
| 5 | 10 | 0.94 | 7.31 | 6.44 | 1.44 | 1.44 | - | 8 | 0.88 | 0.75 | 8.5 | 15 |
| 6 | 11 | 1 | 8.5 | 7.56 | 1.56 | 1.56 | - | 8 | 0.88 | 0.75 | 9.5 | 19 |
| 8 | 13.5 | 1.12 | 10.62 | 9.69 | 1.75 | 1.75 | - | 8 | 0.88 | 0.75 | 11.75 | 30 |
| 10 | 16 | 1.19 | 12.75 | 12 | 1.94 | 1.94 | - | 12 | 1 | 0.88 | 14.25 | 43 |
| 12 | 19 | 1.25 | 15 | 14.38 | 2.19 | 2.19 | - | 12 | 1 | 0.88 | 17 | 64 |
| 14 | 21 | 1.38 | 16.25 | 15.75 | 2.25 | 2.25 | - | 12 | 1.12 | 1 | 18.75 | 90 |
| 16 | 23.5 | 1.44 | 18.5 | 18 | 2.5 | 2.5 | - | 16 | 1.12 | 1 | 21.25 | 98 |
| 18 | 25 | 1.56 | 21 | 19.88 | 2.69 | 2.69 | - | 16 | 1.25 | 1.13 | 22.75 | 130 |
| 20 | 27.5 | 1.69 | 23 | 22 | 2.88 | 2.88 | - | 20 | 1.25 | 1.12 | 25 | 165 |
| 24 | 32 | 1.88 | 27.25 | 26.12 | 3.25 | 3.25 | - | 20 | 1.38 | 1.25 | 29.5 | 220 |
Manufacturing Process of Pipe Flanges
Packing & Loading
Flange inspection
Pipe Flanges is transported in containers