What is plate flange for welding EN1092-1?
European Standard EN 1092-1 — Flanges for pipes — Requirements for steel flanges are specified according to their nominal pressure (PN) and size (DN). Plate flange for welding is the type 01 in EN1092-1. It is one of the most commonly used flanges in industries. Plate flanges are usually used in industrial pipelines, industrial boiler&tank, or matching with valves etc.
Some datas about plate flange for welding EN1092-1
| Product name: | Plate flange for welding EN1092-1 |
| Manufacturing Standard: | EN1092-1 |
| Material Standard: | C22/CK22, P235GH/S235, DIN17200, F304/304L, F316/316L etc. |
| Size Range: | 1/2”, 1”, 11/4”, 11/2”, 2”, 3”, 4”, 6”, 8”, 10”, 12”, 16”, 18”, 20” to 48”. (DN15-DN1200) |
| Pressure: | PN2.5, PN6, PN10, PN16, PN25, PN40, PN63, PN100, PN160, PN250, PN320, PN400 |
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Surface Coatings: | Black painting, anti-rust oil, epoxy coated, galvanized and yellow painting. |
What are the differences between plate flanges FF and RF?
“FF” and “RF” are all the sealing faces of plate flanges. Plate flange FF is called EN1092-1 type 01A and RF is called EN1092-1 type 01B.
The first and most widely used TYPE is EN 1092-1 Type 01A flat welded flange.
The label of flange provides a lot of information: EN 1092-1 is the production standard, type 01 means it is a welded flange, and A means flat sealing face. These flanges are used to join pipes and welded by overlap welding. And then they are connected by bolts.
Flat flanges conforming to EN1092-1 Type 01A are designed to connect piping, valves, fittings and pumps together. The connection is achieved by through overlap welding. The commonly adopted pressure is PN10, PN16, PN25, and PN40, the diameter is from DN15-DN1200.
The second type of flange is also flat welded flange (Type 01), but their sealing face is different from the previous one because they have a raised face called type 01B. The EN 1092-1 Type 01B RF flanges have a low pressure relief ring around the center hole of the flange, which is useful and convenient for checking the position of the gasket. They are also welded by overlap welding and connected by bolts together.
Raised face flanges conforming to EN1092-1 Type 01B are designed to connect piping, valves, fittings and pumps together. The surfaces of the gaskets are raised above the bolted circular surface and the commonly adopted pressure is PN10, PN16, PN25, and PN40, the diameter is from DN15-DN1200.
What are the features of flat welding flange?
Flat welding flange is suitable for low pressure grade, pressure fluctuation, vibration and shock are not serious in the pipeline system. The advantages of flat welding flanges are that they are easier to center, and the price is relatively cheap, so it has been widely used.
The disadvantages of plate flanges:
First, the rigidity is poor, do not use in hazardous occasions.
Second, They are more likely to bump in transportation because of the shape features.
Third, the main design disadvantage of flat welded flanges is that they cannot guarantee no leakage.
