1.

 Chief controller of Explosives Nagpur

a)  Stationary  & Mobile unfired 
      pressure  vessels

2.

Chief Inspector of Boilers & Smoke Nuisances (IBR)

a)  Boilers and its components        
b)  Condensers        
c)  Steam Drums
d)  H.P.Piping

3.

M/S Lloyd's Register of : Industrial Services    

a)  E.O.T. Cranes
b)  Pressure Vessels

4.

M/S Engineers India Ltd. 
        (As Sub-Contractors of L&T)

a)  Storage tanks 
b)  Chemical process equipments

5.

M/s Bureau Veritas Industrial Service

a)  Pressure Vessels        
b)  Chemical Plants        
c)  Special Equipments for Defence
d)  E.O.T. Cranes

6.

M/S ABS Industrial Verification

a)  Pressure Vessels 
b)  Special turnkey projects

7.

M/S Det Norske Veritas (DNV)

a)  Pressure Vessels 
b)  Chemical Plants        
c)  Special Equipments for Defence

8.

M/S Tata Consulting Engineers     

a)  Pressure Vessels
b)  Reaction Kettles         
c)  Anti Surge Vessels

9.

M/s Davy Power Gas  

a)  Pressure Vessels 
b)  Heat Exchangers        
c)  Chemical Equipments

10.

M/S Humphreys & Glassgow Consultants (p) Ltd. 

a)  Chemical Process Equipments 

11.

M/S M. N. Dastur & Co. Pvt.Limited. 

a)  Steel plant  equipment 
b)  E. O. T. Cranes        
c)  Structural Fabrication for        
      Aerospace application

12.

M/S Development Consultants P.Ltd. 
        (As sub-contract to Voltas Limited)

a)  Pollution Control equipment 
b)  Electro static Precipitators