Vanasan valves are produced using various materials meeting international standards. Theese materials are selected based on the corrosive and erosive properties of the fluid concerned.

Most suitable combination of trim material is selected according to ANSI B 16.34

CAST MATERIALS:

ASTM A216 Gr WCB
Group 1.1 materials:
This group of cast carbon steel is suitable for the pressurized shell of the valve. High tensile strength, resistance to impacts and breaking makes this material group a suitable choice for general usage.
This material group also has high weldability. It is very useful for saturated or super heated steam, hot or cold water and for non-corrosive oil, gas, air etc. lines.
It is mainly used in producing multi-purpose valves. This material group is not recommended for prolonged usage in temperatures above 425°C.

ASTM A217 Gr WC6
Group 1.9 materials:
This is an alloy steel with chrome-molibdenum that is recommended to be used up to 595°C. Its resistance to graphitization and creep is very high. Weldability is also a characteristic of this alloy.

ASTM A217 Gr WC9
Group 1.10 materials:
This material group is a chrome-molibdenum alloy steel. It is recommended to be used up to 570°C. Above this temperature, the risk of oxidation should be taken in to consideration.

ASTM A217 Gr WC1
Group 1.5 materials:
This is a molibdenum alloy steel with low carbon content. It is a weldable and high temperature steel and can be used up to 455°C.

ASTM A217 Gr C5
Group 1.13 materials:
This material group is recommended to be used at high temperatures for steam, water, oil or gas lines. It has the highest resistance to creep, corrosion, erosion and graphitization up to 595°C. High corrosion resistance to sulphur in oil lines makes this material suitable for refinery use. It is not suitable for welding.

ASTM A351 Gr CF8
Group 2.1 materials:
This material group is austenic stainless steel that can be used highly corrosive media up to 540°C. It has a wide range of application and corresponds to AISI 304.

ASTM A351 Gr CF8M
Group 2.2 materials:
This group of stainless steel is also known as AISI 316. It contains Mb, which makes it more resistant to severe corrosive conditions than 2.1 material group. It is not recommended for use above 540°C.

FORGED MATERIALS:

Forged process brings the particles of the steel closer, which makes the steel denser and consequently a more robust material compared to cast steels. Forged also gets rid of the imperfections and the possible voids in the original steel. Therefore, forged steel valves are ideal for petroleum refineries, high pressure and high temperature oil and gas lines and power plants.
ASTM A105, ASTM A182 Gr F11, ASTM A182 Gr F5, ASTM A182 Gr F304 and ASTM A182 Gr F316 are the most widely used steels for the production of forged steel valves.

Various trim materials such as 13%Cr, F304, F316 or stellite deposit over one of these materials are used in forged steel valves depending on the client's preference.
The threads of female screwed end (threaded) forged valves conform to ANSI B2.1 (NPT) or to DIN 2999 (R). Dimensions of the socket weld end forged valves, on the other hand, conform to ANSI B16.11 standard. Flanges of the forged valves with flanged end connections are welded to the forged body. The welding prcedure applied is in accordance with the ANSI B31.3 standard. Flange dimensions and drillings conform with ANSI B16.5 or DIN 2501, depending on the valve standard defined by buyers.

ASTM A105
Group 1.1 materials:
This is a general purpose carbon steel used in forged. It is not recommended for prolonged usage in temperatures above 425°C, due to the possible graphitization of its carbon content. It resists well to water, steam, oil and atmospheric corrosion.