Flanges

Pipe flanges are basically plates or rings used to connect pipes, valves and other piping equipment to form a piping system.

Blind flanges
These Flanges are used as a termination point to a piping system.
Welding Neck Flanges
Weld-Neck flanges or welding-neck flanges can be differentiated from all other types of flange by their long tapered hub.
Slip-On Flanges
Slip-On flanges are welded both inside and out to provide sufficient strength and prevent leakage.
Lap Joint Flange

A lap-joint flange is a two-component assembly, with a stub end that has a lap-joint ring flange placed over it.

Threaded Flanges
Threaded flanges are threaded in the bore which match an external thread on the pipe.
Socket Weld Flanges
Socket-Weld Flanges has a female socket in which pipe is fitted.

General flange standards

All flanges are manufactured in accordance with industry-accepted standards.

DIN flange
AWWA
StandardSpecification
ASTM A105Standard Specification for Carbon Steel Forgings for Piping Applications
ASTM A350Standard Specification for Carbon and Low-Alloy Steel Forgings, Requiring Notch Toughness Testing for Piping Components
ASTM A182Standard Specification for Forged or Rolled Alloy and Stainless Steel Pipe Flanges, Forged Fittings, and Valves and Parts for High-Temperature Service
ASTM A404Specification for Forged or Rolled Alloy Steel Pip Flanges, Forged Fittings, and Valves and Parts Specially Heat Treated for High-Temperature Service (Withdrawn 1974)
ASTM A234Standard Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Moderate and High Temperature Service
ASTM A420Standard Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Low-Temperature Service
ASTM A403Standard Specification for Wrought Austenitic Stainless Steel Piping Fittings
ASTM A694Standard Specification for Carbon and Alloy Steel Forgings for Pipe Flanges, Fittings, Valves, and Parts for High-Pressure Transmission Service

Specialty flange

A Specialty flange is a component with a flanged joint that has the same bolting structure as a standard flange, but a specialty flange has its own characteristics.

Flange size & tolerance

Our company offers a wide range of flanges like PL, SW, BL, WN,SO,LJ, ASME/ANSI B16.5 etc., which is precisely engineered in

These Flanges are most durable and manufactures to fit in different size of Pipes.

 

Tolerance of Welding Neck Flanges

Outside DiameterWhen O.D. is 24" or less ±1.6mm﹡
Inside Diameter10" and smaller ±0.8mm
12" thru 18" ±1.6mm
20" and larger +3.2mm, -1.6mm
Outside Diameter of hub5" and smaller +2.4mm, -0.8mm﹡
6" and larger +4.0mm, -0.8mm
Diameter of contact face1/16" rasied face tongue and groove male, female ±0.8mm
1/4" rasied face tongue and groove male, female ±0.4mm
Diameter of hub at basewhen hub base is 24" or smaller ±1.6mm﹡
Diameter of hub at point of welding5" and smaller +2.4mm, -0.8mm
6" and larger +4.0mm, -0.8mm
DrillingBolt circle ±1.6mm
Bolt hole spacing ±0.8mm
Eccentricity of bolt circle with respect to facing2 1/2" and smaller: 0.8mm, max﹡
Eccentricity of bolt circle with respect to bore3" and larger: 1.6mm, max﹡
Thickness18" and smaller +3.2mm, -0mm
20" and larger +4.8mm, -0mm
Length of thru hub10" and smaller ±1.6mm
12" and larger ±3.2mm

Tolerance of Threaded Flanges, Socket Welding Flanges, Slip-On Flanges
Lap Joint Flanges and Blind Flanges

Outside DiameterWhen O.D. is 24" or less ±1.6mm﹡
Inside DiameterThreadedWithin limits on boring gauge
Socket welding, Slip-on and Lap joint, 10" and smaller +0.8mm, -0mm
Socket welding, Slip-on and Lap joint, 12" and larger +1.6mm, -0mm
Outside Diameter of hub5" and smaller +2.4mm, -0.8mm﹡
6" and larger +4.0mm, -0.8mm
Diameter of contact face1/16" rasied face tongue and groove male, female ±0.8mm
1/4" rasied face tongue and groove male, female ±0.4mm
Diameter of counterboresame as for inside diameter
DrillingBolt circle±1.6mm
Bolt hole spacing±0.8mm
Eccentricity of bolt circle with respect to facing2 1/2" and smaller: 0.8mm, max﹡
Eccentricity of bolt circle with respect to bore3" and larger: 1.6mm, max﹡
Thickness18" and smaller +3.2mm, -0mm
20" and larger +4.8mm, -0mm
Length of thru hub10" and smaller ±1.6mm
12" and larger ±3.2mm

Chemical Analysis(%) For Part Standard

The usual materials of flanges include stainless steel, carbon steel, aluminum and plastic.

StandardGradeCSiMnPSVNbTiCrMoNiAlNbNOthers
maxmaxmaxmaxmaxmaxmaxmaxmaxmaxmaxmaxmaxmaxmax
A694F420.28-1.300.0300.030----------
F460.28-1.400.0300.030----------
F520.28-1.400.0300.030----------
F560.28-1.400.0300.030----------
F600.28-1.400.0300.030----------
F650.28-1.400.0300.030----------
F700.28-1.400.0300.030----------
A182F110.05-0.150.50-1.00.30-0.600.0250.025---1.00-1.500.44–0.65-----
F220.05-0.150.500.30-0.600.0250.025---1.90-2.600.87–1.13-----
F50.150.500.30-0.600.0250.025---4.00-6.000.45–0.65-----
F90.150.25-1.00.30-0.600.0250.025---8.00-10.000.90–1.10-----
F910.08-0.120.20-0.500.30-0.600.0200.0100.18–0.25--8.00-9.500.85–1.050.400.04-0.03–0.07Cb
0.06–0.10
F920.07-0.130.50.30-0.600.0200.0100.15–0.25--8.50-9.500.30–0.600.400.04-0.03–0.07Cb
0.04–0.09 W 1.5–2.00 B
0.001–0.006

Tensile Property For Part Standard

StandardGradeYield Strengh(Mpa)Tensile Strengh(Mpa)HardnessElongation(%)
MinMaxMinMaxMax
A694F42290-415--　
F46320-435--
F52360-460--
F56390-490--
F60415-520--
F65450-535--
F70485-570--
A182F11205-380--　
F22205-380--
F5205-415--
F9205-415--
F91415-585--
F92440-620--

Dimensional tolerances for AWWA pipe flanges

Listed below are the Dimensional Tolerances to which flanges are manufactured. 

Ring type Slip-on and Blind flangesHUB type slip-on
O.D.<=24"+/- 0.6"(1.6mm)O.D.<=24"+/- 0.6"(1.6mm)
>24"+/- .12"(3.2mm)>24"+/- .12"(3.2mm)
I.D.Socket-Welding10" and Samller
+.03"(0.8mm),-0"		I.D.10" and Samller+.03"(0.8mm)
Slip-on and
Lap Joint		12" and Larger
+.06"(1.6mm),-0"		12"-18"+/-.06"(1.6mm)
20"-42"+.12"(3.2mm)
+.06"(1.6mm)
O.D. of Hub<=12"+.09"(2.4mm),
-.06"(1.6mm)		Diameter of
Contact Face		0.06" Raised Face+/-.03"(0.8mm)
14"-42"+/-.12"(3.2mm)
Diameter of Contact face0.06" Raised Face+/- .03"(0.8mm)Diameter of Hub at baseX<=24"+/-.06"(1.6mm)
X>24"+/-.12"(3.2mm)
Deameter of Contact face<=10"+.03"(0.8mm),
-0"		Diameter of Hub at point of Welding<=5"+.09"(2.4mm),
-.03"(0.8mm)
12"-42"+.06"(1.6mm),
-0"		>=6"+.16"(4.0mm),
-.03"(0.8mm)
DrillingBolt Circle1/2"-24"
/26"-42"		DrillingBolt Circle1/2"-24"
/26"-42"
+/-.06"(1.6mm)
+/-.06"		+/-.06"(1.6mm)
+/-.06"
Bolt hole
spacing		+/-.03"(0.8mm)
Bolt hole
spacing		+/-.03"(0.8mm)
Eccentricity of Bolt circle with respect to bore.03" Max.
(0.8mm)		Eccentricity of Bolt circle with respect to bore.03" Max.
(0.8mm)
Thickness18"& Small+.12"(3.2mm),-0"Thickness18"& Small+.12"(3.2mm),-0"
20"-42"+.19"(1.6mm)20"-42"+.19"(1.6mm)
Length Thru Hub<=10"+/-.06"(1.6mm)Length Thru Hub<=10"+/-.06"(1.6mm)
12"-42"+/1.12"(3.2mm)12"-42"+/1.12"(3.2mm)

These tolerances are a part of ANSI B16.5 and AWWA C207-01 Sec. 4.2 except where noted otherwise.  The limits given are maximum.  Rigid inspection procedure assures the maintenance of high standards of accuracy in regular day to day production.

Pipeline & fittings with flanges

Flange gasket

A flange gasket is a type of gasket made to fit between two sections of pipe that are flared to provide higher surface area.

 

Steel pipe flange gaskets are used to create seal between two flange faces. The flange face acts at the seal seat and the flange gasket compresses between two flanges, with the bolt compression, to fill all irregularities in the flange face and create a seal. The gasket is selected based on the operating condition such as pressure, temperature and chemical exposure.

Gaskets are available in following three types:

  • Full Face Gasket: covers the full face of the flange. Generally used on flat face flanges
  • Flat ring Gasket: covers only the sealing surface or the raised face of the flange.
  • Metallic Ring Gakset: designed to be fitted in RTJ Flanges.

AWWA Standard flange

AWWA Flange Standards differ from ANSI (American National Standards Institute) and ASME (American Society of Mechanical Engineers) certifications in a variety of ways, the most important being their specificity: AWWA standards evaluate properties that particularly affect potable water use, as opposed to broader industrial flange applications

AWWA Flange Charts and Drawings

These tolerances are a part of ANSI B16.5 and AWWA C207-01 Sec. 4.2 except where noted otherwise.

General Information

American Water Works Association (AWWA) is an international non-profit, scientific and educational association founded to improve water quality and supply. Established in 1881, it has a membership (as of 2012) of around 50,000 members worldwide.

  • Full Face Gasket: covers the full face of the flange. Generally used on flat face flanges
  • Flat ring Gasket: covers only the sealing surface or the raised face of the flange.
  • Metallic Ring Gakset: designed to be fitted in RTJ Flanges.
Dimensional tolerances for AWWA Standard flanges

 Listed below are the Dimensional Tolerances to which flanges are manufactured.    The limits given are maximum. 

Ring type Slip-on and Blind flangesHUB type slip-on
O.D.<=24"+/- 0.6"(1.6mm)O.D.<=24"+/- 0.6"(1.6mm)
>24"+/- .12"(3.2mm)>24"+/- .12"(3.2mm)
I.D.Socket-Welding10" and Samller
+.03"(0.8mm),-0"		I.D.10" and Samller+.03"(0.8mm)
Slip-on and
Lap Joint		12" and Larger
+.06"(1.6mm),-0"		12"-18"+/-.06"(1.6mm)
20"-42"+.12"(3.2mm)
+.06"(1.6mm)
O.D. of Hub<=12"+.09"(2.4mm),
-.06"(1.6mm)		Diameter of
Contact Face		0.06" Raised Face+/-.03"(0.8mm)
14"-42"+/-.12"(3.2mm)
Diameter of Contact face0.06" Raised Face+/- .03"(0.8mm)Diameter of Hub at baseX<=24"+/-.06"(1.6mm)
X>24"+/-.12"(3.2mm)
Deameter of Contact face<=10"+.03"(0.8mm),
-0"		Diameter of Hub at point of Welding<=5"+.09"(2.4mm),
-.03"(0.8mm)
12"-42"+.06"(1.6mm),
-0"		>=6"+.16"(4.0mm),
-.03"(0.8mm)
DrillingBolt Circle1/2"-24"
/26"-42"		DrillingBolt Circle1/2"-24"
/26"-42"
+/-.06"(1.6mm)
+/-.06"		+/-.06"(1.6mm)
+/-.06"
Bolt hole
spacing		+/-.03"(0.8mm)
Bolt hole
spacing		+/-.03"(0.8mm)
Eccentricity of Bolt circle with respect to bore.03" Max.
(0.8mm)		Eccentricity of Bolt circle with respect to bore.03" Max.
(0.8mm)
Thickness18"& Small+.12"(3.2mm),-0"Thickness18"& Small+.12"(3.2mm),-0"
20"-42"+.19"(1.6mm)20"-42"+.19"(1.6mm)
Length Thru Hub<=10"+/-.06"(1.6mm)Length Thru Hub<=10"+/-.06"(1.6mm)
12"-42"+/1.12"(3.2mm)12"-42"+/1.12"(3.2mm)

Rigid inspection procedure assures the maintenance of high standards of accuracy in regular day to day production.

AWWA Vs. ANSI Flange Standards

Both the AWWA and ANSI have thorough standards for flanges, and the two standards are different in several ways. AWWA standards provide flange properties intended for potable water use only. In contrast, ANSI standards are aimed at industrial flange applications.

Both the AWWA and ANSI have thorough standards for flanges, and the two standards are different in several ways. AWWA standards provide flange properties intended for potable water use only. In contrast, ANSI standards are aimed at industrial flange applications.

For example, AWWA flange ratings are applicable only at atmospheric temperature, while ANSI ratings cover flange installations from -20°F to 1500°F. AWWA standards provide flange properties intended for potable water use only. In contrast, ANSI standards are aimed at industrial flange applications. For example, AWWA flange ratings are applicable only at atmospheric temperature, while ANSI ratings cover flange installations from -20°F to 1500°F.

ANSI covers numbered class flanges from 150 to 2500, and AWWA standards encompass lettered flange classes B, E, F, and the commonly used class D connection. AWWA provides ratings for a much broader range of nominal pipe sizes (3″-144″) than ANSI provides (1/2″-24″).

Finally, ANSI and AWWA flange standards differ in the breadth of applications discussed. ANSI includes information for welded auxiliary connections and tapping, while AWWA does not address those installations. Also, the AWWA standard only encompasses ring, hub type, blind flanges, and threaded iron flanges while the ANSI standard inlcudes all flange types.

This discussion on AWWA flange standards and ANSI flange standards is based on information from ANSI/AWWA C115/A21.15-99: “American National Standard for Flanged Ductile-Iron Pipe with Ductile-Iron or Gray-Iron Threaded Flanges”, ANSI/AWWA C207-94: “AWWA Standard for Steel Pipe Flanges for Waterworks Service-Sizes 4 In. Through 144 In.”, and ANSI B16.5-1981: “Pipe Flanges and Flanged Fittings”.

Note:
  1. Ring flanges available overbored or counterbored per customer specification.
  2. Bolt holes shall be drilled 1/8th inch larger in diameter than the nominal diameter of the bolt, except for flanges larger than 84 inch in diameter which shall be drilled 3/16th inch larger than the nominal diameter of the bolt.
  3. Drilling same as ANSI/ASME B16.1 125 lb and B16.5 150 lb pattern.
  4. Flanges available overdrilled to accommodate insulators.
  5. AWWA recommends the use of dished head assemblies as alternate to blind flanges, sizes over 72" nominal.
  6. AWWA C207-01 Class B and D Hub Flanges are identical to Industry Standard Class 125 Light Weight Flanges.

DIN flanges

DIN Flanges production and processing of finished solution treatment must be enclosed , so that product performance is optimal.

Applications Of DIN Flanges

In many applications, engineers need to find a way to close off a chamber or cylinder in a very secure fashion, usually because the substance inside must differ from the substance outside in composition or pressure.

  • DIN Flanges used in Chemical and petrochemical processing
  • DIN Flanges used in electronics
  • DIN Flanges used in processing equipment for maintaining product purity in handling foods, synthetic fibers
  • DIN Flanges used in marine and offshore engineering

Characteristics of DIN Flanges

DIN Flanges production and processing of finished solution treatment must be enclosed , so that product performance is optimal.

  • DIN Flanges is highly resistant to various reducing chemicals
  • DIN Flanges is excellent resistance to caustic alkalies
  • DIN Flanges is high electrical conductivity
  • DIN Flanges is excellent corrosion resistance to distilled and natural waters
  • DIN Flanges is resistance to neutral and alkaline salt solutions
  • DIN Flanges is excellent resistance to dry fluorine
  • DIN Flanges is widely used to handle caustic soda
  • DIN Flanges is good thermal, electrical and magnetostrictive properties
  • DIN Flanges is offers some resistance to hydrochloric and sulfuric acids at modest temperatures and concentrations

Dimensions of DIN Flanges

Flange Nominal DiameterPressure Rating (PN) 
**Nominal BSP Pipe SizePN6PN10PN16PN25PN40 
DN 107590909090O.D.
3/8"5060606060PCD (bolt circle)
 4 x 114 x 144 x 144 x 144 x 14# of holes x diam. of holes
DN 158095959595O.D.
1/2"5565656565PCD (bolt circle)
 4 x 114 x 144 x 144 x 144 x 14# of holes x diam. of holes
DN 2090105105105105O.D.
3/4"6575757575PCD (bolt circle)
 4 x 114 x 144 x 144 x 144 x 14# of holes x diam. of holes
DN 25100115115115115O.D.
1"7585858585PCD (bolt circle)
 4 x 114 x 144 x 144 x 144 x 14# of holes x diam. of holes
DN 32120140140140140O.D.
1 1/4"90100100100100PCD (bolt circle)
 4 x 144 x 184 x 184 x 184 x 18# of holes x diam. of holes
DN 40130150150150150O.D.
1 1/2"100110110110110PCD (bolt circle)
 4 x 144 x 184 x 184 x 184 x 18# of holes x diam. of holes
DN 50140165165165165O.D.
2"110125125125125PCD (bolt circle)
 4 x 144 x 184 x 184 x 184 x 18# of holes x diam. of holes
DN 65160185185185185O.D.
2 1/2"130145145145145PCD (bolt circle)
 4 x 144 x 184 x 188 x 188 x 18# of holes x diam. of holes
DN 80190200200200200O.D.
3"150160160160160PCD (bolt circle)
 4 x 188 x 188 x 188 x 188 x 18# of holes x diam. of holes
DN 100210220220235235O.D.
4"170180180190190PCD (bolt circle)
 4 x 188 x 188 x 188 x 228 x 22# of holes x diam. of holes
DN 125240250250270270O.D.
5"200210210220220PCD (bolt circle)
 8 x 188 x 188 x 188 x 268 x 26# of holes x diam. of holes
DN 150265285285300300O.D.
6"225240240250250PCD (bolt circle)
 8 x 188 x 228 x 228 x 268 x 26# of holes x diam. of holes
DN 175 315315330350O.D.
7" 270270280295PCD (bolt circle)
  8 x 228 x 2212 x 2612 x 30# of holes x diam. of holes
DN 200320340340360375O.D.
8"280295295310320PCD (bolt circle)
 8 x 188 x 2212 x 2212 x 2612 x 30# of holes x diam. of holes
DN 250375395405425450O.D.
10"335350355370385PCD (bolt circle)
 12 x 1812 x 2212 x 2612 x 3012 x 33# of holes x diam. of holes
DN 300440445460485515O.D.
12"395400410430450PCD (bolt circle)
 12 x 2212 x 2212 x 2616 x 3016 x 33# of holes x diam. of holes
DN 350490505520555580O.D.
14"445460470490510PCD (bolt circle)
 12 x 2216 x 2216 x 2616 x 3316 x 36# of holes x diam. of holes
DN 400540565580620660O.D.
16"495515525550585PCD (bolt circle)
 16 x 2216 x 2616 x 3016 x 3616 x 39# of holes x diam. of holes
DN 500645670715730755O.D.
20"600620650660670PCD (bolt circle)
 20 x 2220 x 2620 x 3320 x 3620 x 42# of holes x diam. of holes
DN 600755780840845 O.D.
24"705725770770 PCD (bolt circle)
 20 x 2420 x 2720 x 3320 x 36 # of holes x diam. of holes

Rigid inspection procedure assures the maintenance of high standards of accuracy in regular day to day production.

DIN Flanges Norms

All the Raw Materials received by our company are subject to chemical and physical test and weighed immediately on receipt only thereafter they are taken in the stock.

The Welding neck flanges is normally referred to as the high hub flange.

Welding Neck Flanges

A weld neck flange (also known as a high-hub flange and tapered hub flange) is a type of flange.

Threaded Flanges

Threaded flanges are widely demanded as pipe flanges i.e called as threaded pipe flanges used in different industrial applications.

Slip-on flange

Slip-On flanges or SO flanges are commonly lower in price than weld-neck flanges, and to this effect are a popular choice for our customers.

Blind Flanges

The blind flange is used to close ends of piping systems. It is a kind of round plate with no center hold but with all the proper bolt holes.

Flange facing types according to DIN EN 1092-1

Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, PN designated - Part 1: Steel flanges

This European standard specifies requirements for circular steel flanges in PN designations PN 2,5 to PN 400 and nominal sizes from DN 10 to DN 4000. This standard specifies the flange types and their facings, dimensions, tolerances, threading, bolt sizes, flange face surface finish, marking, materials, pressure/ temperature ratings and flange masses.

Flange faces have to be smooth enough to ensure a tight, leak-free seal for bolted flanges.

Type A: flat face

Type B: raised face

Type C: tongue face

Type D: groove face

Type E: spigot

Type F: recess

Type G: O Ring recess

Type H: O Ring groove

ANSI flanges

The American National Standard Institute, ANSI, has been overseeing guidelines and standards for products manufactured through several sectors.

 

WHAT IS ANSI?

ANSI-approved flanges are used for the industrial market which handles gas, air and steam process systems. Originally formed in 1918, the American National Standards Institute is headquartered in Washington, DC, and is widely recognized as the American organization responsible for overseeing the national standards and conformity assessment system for products, services, processes, systems, and personnel.

ANSI works domestically with American government agencies and organizations, as well as with international entities, to make ANSI standards useful around the world.

Prior to the creation of ANSI, standards for engineering and equipment such as flanges were developed by the American Institute of Electrical Engineers (AIEE or IEEE), the American Society of Mechanical Engineers (ASME), the American Institute of Mining, Metallurgical, and Petroleum Engineers (AIME), the American Society of Civil Engineers (ASCE), and the American Society for Testing and Materials (ASTM International) as members of the United Engineering Society, or UES.

Types of ANSI Flanges

The American National Standards Institute (ANSI) calls for the use of an ANSI flange to be used on specific applications. The ANSI flange is a three-part flange consisting of one flat flange, one flange machined to take a rubber O-ring and the rubber O-ring. The rubber O-ring is placed into the machined groove in one side of the flange and the assembly is tightened against the flat-faced side of the ANSI flange and secured with bolts which are torqued to a specific amount of pressure or tightness. This flange is welded to the ends of pipe to create an easy-to-separate connection. Other variations use a larger flat gasket that fits inside of the bolt circle of the flange.

 

While not rated for excessive pressure, the ANSI flange is commonly used on pipelines transporting air, water and steam under low to moderate pressure. While some flange types use a gasket that not only covers the flange face, the ANSI flange covers the bolt circle as well. These flange bolts run through the gasket and aid in the aligning of the gasket.

The ANSI flange does not use this type of gasket, thus the gasket must be slipped into position after some of the bottom bolts have been put into place. The bolts aid in supporting the gasket that floats in the center of the flange, sealing only the flange opening and creating a leak-proof passage for the pipeline products to pass through when the flange is tightened.

The lower pressure rating of the ANSI flange allows the gasket to remain floating in the middle of the two flanges instead of being held in place by the flange bolts. Unfortunately, this also creates a seal that, while sufficient for its intended purpose, is prone to leaking or blowing out completely much easier than the larger gaskets that are trapped in place by the flange bolts. The smaller gaskets also require more skill to install as they are not a simple drop-into-position type of gasket.

The majority of problems with an ANSI flange originate at the time of assembly. Some installers use a screwdriver to push the gasket into position while tightening the flange bolts. This can create a small nick that ultimately develops into a crack over time. Other problems that contribute to defects in sealing are getting grease on the gasket, trapping debris between the flanges and improperly lining up gaskets at the time of installation.

Price and mechanical properties are higher than ordinary casting flange a grade. The flange is a part that connects the pipe with the pipe and the valve, is connected to the pipe end. It is also used for the flange on the equipment inlet and outlet.

Purpose

Flanges are used to attach a series of pipes or other flanges together. Some flanges, such as in the oil and gas sector, are required to sustain under high amounts of pressure. ASNI provides standards to flange manufactures to test flanges before they can be marketed to a particular sector.

Significance

ANSI provides standards on flanges depending upon pressure in pounds per second per inch (PSI), according to size in inches of the flange. Pressure and size are dependent upon whether the flange is welded to the pipe, threaded or bolted.

Considerations

Depending on the material the flange is made from, such as cast iron or steel, and the type of threaded material used for fittings, every flange is designated to a particular class. From these class ratings, several requirements, such as pressure-temperature rating, bolt and nut dimensions, coating material and several other factors, make up the standards according to the flange characteristics.

Standards of ANSI Flanges:

The classes for flat face flanges are Class 125 and Class 250. The classes for ring joint flanges, tongue and groove flanges and raised flanges are: Class 150, Class 300 (Class 400 - rarely), Class 600, Class 900, Class 1500 and Class 2500. ANSI flanges are divided into classes, depending on pressure, temperature and the type of material used.

 

Hot products

Image

ASTM A335 Chrome Moly Pipe

Chrome Moly Pipe has become a standard in the power generation industry and the petrochemical industry, not only because of its tensile strength, corrosion resistance and high-temperature strength, but also because of its cost-effectiveness. Grades P-11, P-22 – P-91 & P-92 are prevalent grades for the power industry, while P-5 & P-9 are the grades utilized in major refinery processing. ASTM A335 P9 alloy steel pipe ASTM A335 P11 alloy steel pipe ASTM A335 P22 alloy steel pipe ASTM A335 P91 alloy steel pipe ASTM A335 P92 alloy pipes ASTM A335 P5 alloy steel pipe Sunny Steel Supply stocks a full range of the following A335 pipe grades: Main grades:  ASTM A335 P5, P9, P11, P-22, and P91 Size range: NPS 1/4'' to NPS 24'' Wall Thickness - Schedules 40 through 160, STD, XS, XXS. Unscheduled heavy wall pipe thicknesses available up ...
Image

Steel pipe world standards

Pipe manufacturing refers to how the individual pieces of pipe are made in a pipe mill; it does not refer to how the pieces are connected in the field to form a continuous pipeline. Each piece of pipe produced by a pipe mill is called a joint or a length (regardless of its measured length). In some cases, pipe is shipped to the pipeline construction site as “double joints”, where two pieces of pipe are pre-welded together to save time. Most of the pipe used for oil and gas pipelines is seamless or longitudinally welded, although spirally welded pipe is common for larger diameters. 1. Structural Steel Pipe: ASTM A53: GR.A, GR.B ASTM A106: GR.A, Gr.B, Gr.C GB/T 8162: 10#, 20#, 35#,45#, Q345A, Q345B, A345C, Q345D, Q345E, 20Cr, 40Cr, 20Mn2, 45Mn2, 40CrB, 27SiMn, 15CrMo, 20CrMo, 35CrMo, 42CrMo ASTM A519: 1020, 1035, 1045, 4130, 4140 DIN1629: St37.0, St44.0, St55, St52.0 DIN17175: St35.8, 17Mn4, 13CrMo44 EN10297: E355, C45, 34CrMo4 JIS G3441: SCM 420TK, SCM440TK JIS G3445: STKM13A, STKM1...
Image

ASTM A333 Grade 6 Seamless Pipe

ASTM A333 Grade 6 alloy pipe shall be made by the seamless or welding process with the addition of no filler metal in the welding operation. Spec. Grade O.D W.T Length pcs Unit QTY ASTM A333 GR.6 88.90 4.00 6000-12000 15 T 1.3350 ASTM A333 GR.6 114.30 6.00 6000-12000 12 T 1.6980 ASTM A333 GR.6 114.00 7.00 6000-12000 3 T 0.5050 ASTM A333 GR.6 114.30 8.00 6000-12000 5 T 1.1050 ASTM A333 GR.6 114.30 12.00 6000-12000 2 T 0.6500 ASTM A333 GR.6 168.30 7.11 6000-12000 8 T 2.3380 ASTM A333 GR.6 168.30 7.11 12000 3 T 1.0320 ASTM A333 GR.6 168.30 7.11 6000-12000 4 T 1.2960 ASTM A333 GR.6 219.10 12.70     T 3.1820 ASTM A333 GR.6 323.80 9.53     T 1.9030 ASTM A333 GR.6 323.80 10.31     T 0.4560 ASTM A333 GR.3 48.30 5.08 6000-12000 22 T 1.3480 ASTM A333 GR.3 60.30 3.91 10300 18 T 1.0420 ASTM A333 GR.3 60.30 5.54 11800 17 T 1.5060 ASTM A333 GR.3 60.30 5.54 10500 4 T 0.3180 ASTM A333 GR.3 88.90 5.49 8600 8 T 0.7920 ASTM A333 GR.3 88.90 5.49 6000-12000 8 T 0.8360 ASTM A...
Image

ASTM A106 Seamless carbon steel tube for high temperature service

ASTM A106 Seamless carbon steel tube for high temperature service Description: standards: ASTM A106 (ASME SA106) products mainly used: apply to bending, curling and similar forming process. the main products of steel / steel grade: Gr.A; Gr.B; Gr.C. Specifications: diameter: 10.3 to 114.3 mm thickness: 0.8 to 12 mm Length: 6 m above, and, in accordance with customer demand, supply and other specifications of steel pipe. Chemical composition and mechanical properties JIS Number and Corrensponding Foreign Standards ASTM A106 Gr.B Pipes ASTM A106 / A106M - 11 Standard Specification for Seamless Carbon Steel Pipe for High-Temperature Service Tubes for Fluid Our fluid seamless steel tubes are widely used for fluid transport, oil and natural gas long distance transmission as well as fluids. ASTM A106 (ASME SA106) Scope: This specification covers seamless carbon steel pipe for high-temperature service (Note 1) in NPS 1/8 to NPS 48 incl...
Image

Orifice Flanges

Orifice flange for run installation should be so constructed, machined and attached to the that the inner surface of the passage extends through the orifice flange so that there is no recess at the orifice plate. Orifice flanges are used instead of the standard pipe flanges when orifice plate or flow nozzle is used. The basic purpose for this is to measuring the flow rate of either gases or liquids in the respective pipeline. These flanges are used in various industrial applications and are available in various sizes and materials. Orifice Flange manufacturer Sunny Steel supplies Orifice Flanges, Plate Flanges, Datasheets and dimensional information ANSI 300 Flange - Orifice, Weld Neck, ANSI Class 300, B16.36 (in) ANSI 400 Flange - Orifice, Weld Neck, ANSI Class 400, B16.36 (in) ANSI 600 Flange - Orifice, Weld Neck, ANSI Class 600, B16.36 (in) ANSI 900 Flange - Orifice, Weld Neck, ANSI Class 900, B16.36 (in) ANSI 1500 Flange - Orifice, Weld...
Image

ASTM A213 T22 alloy tube

ASTM A213 T22 is the part of ASTM A213 Standard Specification for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, Heat-Exchanger Tubes. We are manufacturer of ASTM A213 T22 alloy tube and supply high quality ASTM A213 T22 alloy tube in both large and small quantities worldwide and offer you the best prices in the market. ASTM A213 T22 Standard covers seamless ferritic and austenitic steel boiler, superheater, and heat-exchanger tubes. + SA 213-T22 u-bended tube Grades containing the letter H in their designation have requirements different from those of similar grades not containing the letter H. These different requirements provide higher creep-rupture strength than normally achievable in similar grades without these different requirements. ASTM A213 T22 tubes shall be made by the seamless process and shall be either hot finished or cold finished, as specified. Grade TP347HFG shall be cold finished. Heat treatment shall be done separately and ...
Image

API Spec 5CT - Specification for Casing and Tubing

API Spec 5CT – Specification 5CT/ISO 11960, Specification for Casing and Tubing, Eighth Edition, Petroleum and natural gas industries-Steel pipes for use as casing or tubing for wells. Scope: This Standard specifies the technical delivery conditions for steel pipes (casing, tubing and pup joints), coupling stock, coupling material and accessory material and establishes requirements for three Product Specification Levels (PSL-1, PSL-2, PSL-3). The requirements for PSL-1 are the basis of this Standard. The requirements that define different levels of standard technical requirements for PSL-2 and PSL-3, for all Grades except H-40, L-80 9Cr and C110, are contained in Annex H. Peotroleum and natureal gas industies – Steel pipes for use as casing or tubing for wells. Standard: API SPEC 5CT API 5CT pipe Size range(mm): Outer Dimensions: 6.0mm – 219.0mm Wall Thickness: 1.0mm – 30 mm Length: max 12000mm Application: gas, water and oil transportation in both oil and natura...
Image

Tubing, Casing and Line Pipes

Tubing and casing strings designed for the specific requirements for conveying gaseous media and combustible liquids or solids. ERW oil casing application and market analysis API Spec 5CT - Specification for Casing and Tubing API SPEC 5L - Standard Specification for Line Pipe API 5L Gr. B Standard specification Tensile test and hardness test on oil pipeline Properties &  Inspection Oil pipeline anti-rust varnish Pipeline project All wells drilled for the purpose of oil or gas production (or injecting materials into underground formations) must be cased with material with sufficient strength and functionality. API5L Steel pipe for pipeline transportation system Peotroleum and natureal gas industies - Steel pipe for pipeline transportation system. ERW steel pipe API 5L X60 steel pipe API 5L X70 steel pipe API Spec 5CT Casing pipe API Spec 5CT  – Specification 5CT/ISO 11960, Specification for Casing and Tubing, Eighth Edition, Petroleum...
Image

Seamless Steel Pipe and Tubes

Seamless steel pipe is a tubular section or hollow cylinder, usually but not necessarily of circular cross-section, used mainly to convey substances which can flow — liquids and gases (fluids), slurries, powders and masses of small solids. We can makes and markets cold-drawn and hot rolled seamless steel pipes and cold-drawn special-section seamless pipes which are widely applied in the industries of petrochemical, boiler, automobile, mechanical, construction, chain, electric of the company is 80000t. Our factories through ISO9001:2000 certificate, has aggressive leadships and outstanding professionals. Steel Pipe & Tubing - All you need to know Steel Pipe & Tubing seem similar at first blush and in fact they share many characteristics but they also have some important differences. Definitions: Steel Tubing  is a hollow steel shape intended for structural purposes and made from carbon, stainless, or galvanized steel further divided as: Mechanical Tubing  is use...
Image

Bolts & Nuts

We are manufacturer of Flange bolts & Nuts and supply high quality Flange bolts & Nuts in both large and small quantities worldwide and offer you the best prices in the market. Hex Bolts Hexagon Socket Bolts Eye Bolts Carriage Bolts Hammer / Channel Bolts T-Head Bolts Oval Neck Track Bolts OEM Special Bolts Spherical Flange Nuts Flange Nuts A flange nut is a nut that has a wide flange at one end that acts as an integrated, non-spinning washer. We have a team of experienced professionals with years of experience in manufacturing. We are manufacturer of Flange bolts & Nuts and supply high quality A193 = This specification covers alloy and stainless steel bolting material for pressure vessels, Valves, flanges, and fittings for high temperature or high pressure service, or other special purpose applications. A320 = Standard Specification for Alloy-Steel and Stainless Ste...

Labels

Show more

Hot products

Bimetal Clad Pipe

Bimetal Clad Pipe
Bimetal Clad Pipe is cast with mold vanishing vacuum suction casting cladding process.

Contact us

Name

Email *

Message *