replace cast iron with pvc

{"cid":"91088840","title":"CE Plastic Extrusion Machine PVC PE Double Wall Corrugated Pipe Extruder","imgUrl":"https:\/\/img.chinax.com\/nimg\/85\/6c\/e949097716516b91ce8f2256192a-200x200-1.jpg","attrs":{"Price":"Negotiable","Brand Name":"AORUI","Model Number":"SJSZ65\/132","Minimum Order Quantity":"1 set","Delivery Time":"30 days","Certification":"CE & ISO9001","Place of Origin":"ShanDong China","Payment Terms":"T\/T L\/C","Supply Ability":"30 sets per quarter","Packaging Details":"Fumigation wood, film,pallet,etc or according to customer\u2019s requirement.","Certificate":"CE & ISO9001","Port":"QingDao","Raw Material":"PVC","After-sales service":"engineers availiable to service","Autoamtic grade":"fully automatic","Dimension(L*W*H))":"Acoording to model","Place of original":"Shandong , China"}}

{"cid":"91220712","title":"HDPE PP PVC Double Wall Corrugated Pipe Production Line","imgUrl":"https:\/\/img.chinax.com\/nimg\/6f\/a6\/b9d9d1347db09a811eef08b0fbdb-200x200-1.jpg","attrs":{"Price":"huashida","Brand Name":"huashida","Model Number":"200-600,600-1000","Minimum Order Quantity":"1","Delivery Time":"90 days","Certification":"CE, ISO9001:2008, QS, GMP","Place of Origin":"china","Payment Terms":"L\/C, D\/A, D\/P, T\/T, Western Union","Supply Ability":"100set a year","Packaging Details":"Standard packaging","Automation":"Automatic","Series":"Dwcp-600,Dwcp-1000","Transport Package":"Standard Package","Computerized":"Computerized","Customized":"Customized","Max Speed":"6m\/Min,1.2m\/Min","Material":"PP\/PE","Specification":"ISO9001: 2008","Production Capacity":"10sets\/Month","Screw No.":"Single-screw"}}