stainless steel welding neck flange

stainless steel welding neck flange

Brief introduction of stainless steel flange                                                                                       

Flanges are the style to collecting the pipes ,valves,pumps,and other equipment to form a pipe system. They are used for oil, chemistry industry,water conservancy,electric power,boiler,machinery,metallurgy,sanitary,construction etc.

Gongyi Runda Pipeline Manufacturing Co., Ltd.

The type of stainless steel flange                                                                                 

The flange faces are also made to standardized dimensions and are typically "flat face", "raised face", "tongue and groove", or "ring joint" styles, although other obscure styles are possible.Flange designs are available as "weld neck", "slip-on", "lap joint", "socket weld", "threaded", and also "blind".

We can make drawing as per your requests and make customized products as per your requests.

stainless steel Flanged stock                                                                                       Gongyi Runda Pipeline Manufacturing Co., Ltd.

We have a large amount products stock, so the producing time can be shorter. welcome to place the order at once !

Gongyi Runda Pipeline Manufacturing Co., Ltd.

Detailed technical parameter of stainless steel flange                                                 

Stainless steel Flange

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.

Flange Standard


Class 150 Flanges-Class 2500 Flanges



6Bar 10Bar 16Bar 25Bar 40Bar



5K Flanges-20K Flanges



6Bar 10Bar 16Bar 25Bar 40Bar



6Bar 10Bar 16Bar 25Bar 40Bar

Flange TYPE

1.Welding neck Flange 2.Slip on


3.Blind flange 4.Long welding neck flange


5.Lap joint flange 6.Socket welding


7.Threaded flange  8.Flat flange

Flange Surface

Anti-rust oil, clear lacquer, Black lacquer, Yellow lacquer, hot-dipped Galvanized, electrical galvanized


Welding, Threaded


Forged, Casting

Flange Size


Flange Package

1.>Standard export packaging (Plywood Case Of Outside,Plastic Cloth Of Inside). 2:As Customers' Requirements

Flange Heat Treatment

Normalizing, Annealing, Quenching+Temperin

Gongyi Runda Pipeline Manufacturing Co., Ltd.

Common data are shown on the sheet above, special size can be customized as per your drawing! 

Producing process

Gongyi Runda Pipeline Manufacturing Co., Ltd.

Test of stainless steel flange                                                                                        

Chemical composition to ensure the material is really what you need

100% comply with international standard dimension and tolerance

Gongyi Runda Pipeline Manufacturing Co., Ltd.

Packing and shipping of stainless steel                                                                      

Each flange is wrapped with plastic film or plastic bag, and then are put into the wooden cases.

The case’s size is normally 1.1*1.1*1.1.

The shipping type: By ship, by air , or International Express Service.

Packing and shipping

About Runda company                                                                                              

Runtda company has advanced production and processing equipment, as well as various professional personnel. By regarding meeting customer requirements as the core of enterprise development, and adhering to the basic quality policy of continuous innovation ,customer satisfaction, fast improvement, and total involvement, we are endlessly producing high quality products to effectively meet different requirements of customers.

Gongyi Runda Pipeline Manufacturing Co., Ltd.

The clients visiting our factory or our booth                                                          Factory

Many foreign friends show great interest in our products on exhibition ,and then visit our factory,

Through that we make it to cooperate with each other . 



Q1: Are you a factory or a trade company?
A1: We are a professional manufacturer for designing and producing of Large-size products.(View Mor)
Q2: Do you make customized products or finished parts?
A2: All parts are custom made only, not in stock, we can produce based on your drawings.
Q3: Will my drawing be safe after you get it?
A3: Yes, we will not release your design to third party unless with your permission.
Q4: What is the MOQ?
A4: Small order is acceptable, but the more, the cheaper.
Q5: How about the samples?
A5: We are happy to make prototype part or sample for clients to ensure quality standard, but it’s charged according to your drawing. 
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