The high quality ductile iron pipe specification

Ductile iron pipe

It has high strength & hardnes as steel and better corrosin resistance than steerl and grey iron, DUNHUI ductile iron pipe is the ideal substute for gray cast iron pipe and common steel pipe. In addition, our DI pipes are produced with good straightness, identical wall thickness, high dimension accuracy, smooth surface finished, remarkable mechanical properties and firmly sticking internal & external coating layer as well. Flexible Push-in joint and rubber gasket are used for more convenient installation of pipelines.

 “DUNHUI” is your correct choice. Welcome to visit 

1.     The high quality ductile iron pipe specification

2. Ductile Iron Pipes

1. Material: Ductile iron grade 500-7/ 450-10 in accordance with ISO1083

2. Standard: ISO 2531, EN545, EN598, ANSI, AWWA

3. Certificate: ISO9001, ISO14001, SGS, NSF, WRAS

4. Test: In accordance with ISO 2531 / EN 545 / EN598 and 100% water pressure test

5. Length: 6m or cut into 5.6m, 5.7m, 5.8m

6. Internal Lining: Cement, conform to ISO4179

7. External coating: Zinc + Bitumen, conform to ISO8179

8. Rubber: NBR, SBR, EPDM according to ISO4633 / EN681.1

9. Note: The gaskets, bolts & nuts are supplied respectively as your special requirement

3.  Products description and Main dimensions

4.Product Performance of Ductile Iron Pipe

Inner coating - cement lining
Product performance---inner lining anticorrosive
SUNS brand zinc coating ductile iron pipes inside lined by using centrifugal cement mortar protective layer. This protective layer is made of high quality and rigorous testing of cement raw materials, whole process controlled by computer. 
Cement lining quality complies with international standards ISO4179, to ensure lining strong, dense, smooth and good surface adhesion to iron surface, no falling, scaling, and thickness uniformity, ensure that the internal every inch pipeline have been protected very well.

5. Production process

Quality Control Groups

• Dimensions Test
• Manufacture process Inspection
• Process Inspection including sand cleaning, assembling, packing and coating
• Final Inspection including delivery marks and etc.
• Particular Tests for different products, such as Load Test, Hydro Test and etc. 

          

7. Technical Standard: 

 Design: EN545
 Certification: ISO9001:2008 

8. Personnel station:

  Have professional salesmen, and 6 Engineers, More than 30 inspectors. 

9. Quality and Safety:

We have a very strict and complete quality control system, which promises that goods we produced are always of the best quality, the enough inspectors to ensure that each product can meet the quality requirements of customers. We do the final inspection in own factory with ISO 9001:2008.

10.Location:

 DUNHUI has a convenient location at the city’s exporting business zone, Dongli District. We are only 9 km to Tianjin  International Airport, and very close to major highways,TIANJIN port. We look forward to work with your business!