Heavy Duty U-Shaped Dump Semi Trailer 

 BRIEF DESCRIPTION    the normal produce process is very important.it can be influence the quality-durable years of the product .even the customer confidence to our product.   3 .NORMAL PROCEDURE   1) cutting    use the plasma cutting machine cut the steel to little parts use for suitable welding and splicing   2) welding    after steel cutting process the next step is welding .this process the main work is beam welding .the top plate-bottom plate and the middle  plate  will  be welding together .  this process will be use submerged arc welding process.this type of welding is very special .its exclusively used in I beam welding .after this welding process other parts of the trailer will be use different welding way for different steel-argon arc welding-electric arc welding-manual welding-gas welding and so on   3) blasting   this process is use for the first step…