Production Instructions 

Wecan produce Amercian Standard, German Standard, Italian Standard, European Standard, Chinese Standard flanges, also offer all kinds of non-standard flanges according to you drawings, diameter ranging from DN15 to DN3000, press rate up to 2500LBS. Flanges are made of carbon steel, stainless steel, alloy steel, duplex ferric austenitic steel. 

The Main Type Of Flange 

The Flange According to petrochemical (SH) industry standard r oughly divided into six categories:

Threaded Flange (PT)

Threaded Flange arealso known as screwed flange, and it is having a thread insidethe flange bore which fits on the pipe with matching male thread on the pipe. This type of joint connection is Speedy and Simple butnot suitable for high presser and temperature applications. Threaded Flanges are mostly used in utility services such as air and water.

 

 

Slip-On Flange (SO)

 

Slip-On Flange has a hole with matching outside diameter of pipe from which pipe can pass. The flange is placed on pipe and fillet welded from both inside and outside.Slip-On Flange is suitable for low press ureand low temperature application. This type of flange is available in large size also to connect big bore piping with storage tank nozzles.

 

 

Weld Neck Flange (WN)

Weld Neck Flange are most widely used flange in process piping. It gives the highest level of joint integrity due to Butt-welded with a pipe.These types of flanges are used in high pressure and high temperature application. Weld neck flanges are Bulky & costly with respect to other types of flange.Also used to transport expensive,flammable,explosive medium pipe road.

 

 

Socket Welding Flange (SW)

Socket Welding Flange refers to the flange which is inserted into the flange ring ladder at the end of the pipe and welded at the outside ofthe pipe.Both with and without neck.Good rigidity with neck flanges,small welding deformation,good sealing,can be used for pressure of 1.0~ 10.0mpa.Used for sealing high requirements of the occasion.

 

Lap Joint Flange (LJ)

Lap Joint Flange is a flange assembly in which the bolt load is transmitted through a loose backing flange onto a stub flange. The stub flange incorporates the gasket contact face.Generally used on pipes,in which case loose bolts can be rotated on both sides of pipes and tightened. The pipe can be disassembled and assembled conveniently.

 

 

Blind  Flange (BL)

The Blind Flange is a blank disc with bolt hole.

These types of flanges are used with another type of flange to isolate the piping system or to terminate the piping as an end. Blind flanges are also used as a manhole cover in the vessel.The function is the same with welding head,but the blind flange can be removed at any time,while welding head can not.

 

The Main Materials Of Flange  

Material	Carbon steel	ASTM A105. ASTM A350 LF1. LF2, CL1/CL2, A234,  S235JRG2, P245GH
		P250GH, P280GHM 16MN, 20MN ,20#
	Stainless steel	ASTM A182, F304/304L, F316/316L
	Alloy steel	ASTM A182 A182 F12,F11,F22,F5,F9,F91etc.
Standard	ANSI	Class 150 Flanges-Class 2500 Flanges
	DIN	6Bar 10Bar 16Bar 25Bar 40Bar
	JIS	5K Flanges-20K Flanges
	UNI	6Bar 10Bar 16Bar 25Bar 40Bar
	EN	6Bar 10Bar 16Bar 25Bar 40Bar
Size Technical Connection  Surface	Anti-rust oil, clear lacquer, Black lacquer, Yellow lacquer,hot-dipped Galvanized, electrical galvanized
	Welding, Threaded
	Forged, Casting
	DN10-DN3600
Heat Treatment	Normalizing, Annealing, Quenching Tempering
Applications	Water works, Shipbuilding industry, Petrochemical & Gas industry, Power industry, Valve industry,and general pipes  connecting projects etc.

 

The Standard of Flanges  

American Standard	ASME B16.5,ASME B16.47,ANSI B16.5,API605,AWWA C207
Japanese Standard	JIS / KS 5K / 10K / 16K / 20K / 30K
German  Standard	DIN2527,2528,2561,2565,2566,2573,2576,2627-2638,2641,2642,2655,2656,2673,86029
British Standard	BS4504 PN16 / 25 / 40,BS10 TABLE E / TABLE D
Italian Standard	UNI 2253,2254,2276,2278,2281,6084-6093
China Standard	GB/T 13402-92,GB/T9112-9124-2000,HG5010-5028

There is nothing wrong with choosing us! 

  

Our Advantages:

1.Professional manufactory.

2.Competitive price.
3.Provide you with some samples for testing
4.Flexible and convenient logistic service.
5.Professional testing, leakage testing,ensuring 100% the tightness.

If you want to get more information about the products, Please to click "Contact us"

 

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