Why Choose Us ?

1. Boiler manufacturing License Grade- A.
2. 50 Years' Experience in the field of boiler Manufacture. 20 Years' Export Experience
3. Double Rings offer best service in boiler solution, boiler design, order contract, boiler delivery, boiler install and commissioning.

Global Service For Double Rings’Boilers

1.Technical Support : Professional Engineer Team give you the suitable Steam Solution.
2.Factory Checking:Easy to visit from Bei Jing or Shang Hai, 10 minutes each train to Xu Zhou city. And warmly welcome all customers to visit .
3.Guidance Installation : After Boiler arrive , engineers will arrange to Guidance Installation and Training.
4.Service after Sale : For Life Service.
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Technical Documents & Certification

1. Product Safety Performance Supervision and Inspection Certification   Third-Party 1 PC
2. Certificate of Quality for boiler Our Company 1 PC
3. Boiler Intensity Calculation Book   Our Company 1 PC
4. Installation & Operation Instruction Our Company 1 PC
5. Equipment Shipping List Our Company 1 PC
6. Boiler Foundation Drawing   Our Company 1 PC
7. Boiler General Drawing Our Company 1 PC
8. Boiler Body Drawing Our Company 1 PC
9. Pipe.Valve.Instrument Drawing Our Company 1 PC 

1.Third-party Inspection Report is from Special Equipment Safety Supervision Inspection Institute of Jiang Su Province. .
2.Certificate of Quality for boiler was also included :
Quality Certification of Main Pressure Components,
Chemical Composition and mechanical property data of steel plate pipe and welding material , Welding sampling report,
Welding Nondestructive examination report for welding
Hydraulic test report etc..

Service after Sale:

Warrant Time One Year for Whole Boiler without mistake operation after shipment.
Technology Service For life.Customer has any questions about the boiler, our engineers will serve and supply the Technology Service immediately.
Guidance Installation After finish the foundation and boiler arrived in the customer’s factory,two engineers will go to customer’s factory to guidance installation with local workers.
Commissioning After installed, the boiler will be commissioning and training for 2 days.
Charge The buyer provide air tickets with round trip, accommodation, food and local communication and transportation and some subsidy.
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