How to ensure the welding performance of sanitary polished stainless steel pipes

Sanitary polished stainless steel tubes are used in the food, storage, transportation, and medical industries. The materials of sanitary stainless steel pipes are stainless steel, which can be divided into sanitary stainless steel seamless pipes, sanitary welded pipes, and cold rolled stainless steel pipes according to their classification.

 

I. Weldability of sanitary polished stainless steel pipe

 

Sanitary pipe fittings have different welding performances for different purposes. Some tableware do not require welding performance, including some pot enterprises. But most products need good raw material welding performance, such as second-class tableware, insulation cups, steel pipes, water heaters, water dispensers, etc. Thin-wall sanitary stainless steel pipe parts have poor rigidity and weak strength, and are easily deformed during processing, which increases the shape and position errors of the parts and makes it difficult to guarantee the parts.

 

Processing quality. Strict requirements are put forward for the clamping of ultra-thin sanitary pipe fittings, the reasonable selection of cutting tools and the selection of cutting amount in turning. The processed ultra-thin wall sanitary grade pipe is a nozzle anti-shock sleeve on a certain product. This workpiece is a large-caliber ultra-thin wall sanitary stainless steel pipe with an outer diameter of 292mm. The material is Z2CND17-12 nitrogen-control stainless steel. The wall thickness is 4mm. The total length of the workpiece exceeds

 

550mm (with clamping allowance), roundness is required to be 0.05mm, and all surface roughness values ​​Ra = 6.3μm, which determines that the precision factor of this workpiece is very high.

 

Corrosion resistance of sanitary polished stainless steel pipes

 

Many stainless steel sanitary fittings have good corrosion resistance in food, such as Class I or II tableware, kitchenware, water heaters, water dispensers, etc. Many foreign businessmen have also tested the corrosion resistance of sanitary fittings: use The NACL aqueous solution is heated to boiling, and the solution is discarded for a period of time, sucked clean and dried, and weighed to determine the degree of corrosion. (Note: When polishing the product,

 

With Fe, it will cause rust spots on the surface during testing).