Shanghai Mingheng Pipe Fittings Machinery Co., Ltd



contact uscontact us

  • No.7658,Hutai Road,Baoshan District,Shanghai,201908,China

  • +86-21-69155806

  • +86-21-69155054

  • general manager:Mr. Shao Sanming


  • sales service


  • +86-13611995918

Quality control Your Position: >Quality warranty >Quality control

1. The quality control of raw material and machine spare parts

   1) All the raw steel and steel plate is for integral cutting to ensure the rigidity and strength of the steel structure. We will make strict raw material inspection before production

   2) The electrical components and spare parts, such as the oil pump, valve, motor etc are world famous brands that imported from Germany, America, Japan and Taiwan to ensure high quality and longer service life of the machine. All of the components comply with CE certification and ISO quality standard

       2. Heat Treatment, Mechanical Machining

1)  Computer assistant design and stress analysis will be done before production. Full penetration welding of the whole machine steel structure and heat treatment ensure the high rigidity of the machine body

2)   Three times heat treatment ensures the machine and moulds have perfect hardness and high accuracy. The hardness of the moulds and mandrels is up to HRC 52­­­­­-56.

3)   Twice CNC machining ensures the precision of the moulds and mandrels


               Instructure Welding              Heat Treatment                  Heat treatment 


                 Nitrogen-Tempering          Nitrogen-Tempering           Stress State Analysis        


                 Stress State Analysis           Stress State Analysis        Stress State Analysis 


              CNC Precision Machining     




   3. Assembly, Inspection and Running

1Engineers with more than 20 years experience make assembly and testing of the machine

2Our machines are designed and manufactured as per customers’ requirements and they can come to check and make pre-acceptance in our plant before shipping

3Hardness inspection of moulds after heat treatment to ensure perfect hardness and comply with technical standard

4)  Pressure testing of hydraulic system to ensure the pressure of cylinder comply with technical standard

5)  Testing and inspection of finished elbows, tees etc to ensure the machines satisfy our clients’ technical requirements

   4. Packing and Transportation

With rich experience of exporting machinery, we have developed long-term cooperation with some world famous forwarder and ship line companies, such as COSCO, CHINA SHIPPING, MAERSK, TNT, DHL etc. Therefore, we can offer our customers best delivery plans on time and schedule


      5. After-Sale Service 

1)  We will send our experienced technicians to our customer’s factory for installation and commissioning. During the commissioning, our technicians will train the customer’s staff to master skills of operating and maintaining the machines

2) Warranty period is 24 months for machine and 12 months for main parts. If malfunction occurs, we will send our engineer to customer’s factory to troubleshooting if necessary

operating hours