Stainless 430 tube shields are made of 430 stainless steel and can be customized to fit perfectly straight sections, curved sections and even finned and specialty tubes.

Stainless steel grade 430 is a non-hardenable steel containing straight chromium, and belongs to the ferritic group of steels. This steel is known for its good corrosion resistance and formability, coupled with practical mechanical properties.

The 430 grade is one of the most used ferritic stainless steel with magnetic properties. The 304 grade is the most used of all stainless steels with non-magnetic properties. The 430 composition includes carbon, manganese, silicon, phosphorus, sulfur, up to 18% chromium and iron in the composition with less than 1% nickel. The 304 has 8% nickel in the composition with 18% chromium, carbon, manganese, silicon, phosphorus, sulfur nitrogen and iron. This chemical composition provides the 304 materials with 215MPa minimum yield strength and 505MPa minimum tensile strength. The 430 material has up to 260MPa minimum yield strength and up to 600MPa minimum tensile strength. The melting point of 430 can range up to 1510 degrees Celsius. The 304 material is denser than the 430 material.

Shapes and specifications of tube shields

The cross-sectional shape of boiler tubes shields is mostly semi-circular (180 degrees), and there are also 120-160 degrees. It is mainly used on finned tubes (water-cooled walls); boiler tubes erosion shields are divided into direct wear-resistant shields, in-curve anti-wear shields, outer-curve anti-wear shields, side-curve anti-wear shields, s-curve anti-wear shields, etc.

Tube shields-outside bend and side bend types

The length of the straight anti-wear shields ranges from 20mm to 3000mm, and the general length of 1000-2000mm is commonly used. The anti-wear shields with bends generally requires a processing drawing and the following parameters should be on the drawing: outer diameter of the pipe used, bending of the pipe Radius R (to the center of the pipe), the degree of bending angle, and the length of the straight sections on both sides of the arc segment of the wear-resistant shields.

“snap-on” type shield

The most basic parameter of boiler tubes shields is the outer diameter of the tube used (that is, the inner diameter of boiler tubes erosion shields). The main specifications of the tube are: 32, 38, 42, 44.5, 48, 51, 57, 60, 63.5 , 76, 89mm, etc . the inner diameter of the boiler tubes erosion shields is usually 1-3mm larger than the outer diameter of the tube used, depending on the actual requirements.

Tube shields production process

To ensure the accuracy of the material. Positive Material Identification (PMI) of stainless steel sheets for tube shields is critical to verifying the grade and composition of stainless steel before it goes into production.
Tube shields from us are manufactured to exacting standards. Advanced equipment and material handling capabilities permit us to offer the fastest turnaround times anywhere.

The current production process for tube shields is to use high-pressure presses and professional moulds for pressing.
The production time is short, the welding performance is good, the welding seam does not fall off, the surface is smooth and the appearance is beautiful. The arc-shaped wear-resistant tile is pressed on a press or bent on a pipe bender with a special mould.