Chapter 5 Chemicals & Utilities Notes | EduRev

: Chapter 5 Chemicals & Utilities Notes | EduRev

 Page 1


 
  Panipat Refinery 
 
 
Department           Unit       Document No      Revision No                       Date of issue          
Production            AVU             PN/AVU/OM/1                 03                                 April - 2004 
 
  Prepared by                                          Checked by                                        Approved by 
 
S.K.M Rahman                            A.K Pandian                                       Vijay Prakash 
   ( DMPN )                                          ( SPNM )                                            ( CPNM ) 
 Chapter No 5                          Page No 1
 
 
 
 
 
 
 
 
 
 
 
 
 
                                                    CHAPTER-5 
 
CHEMICALS & UTILITIES 
Page 2


 
  Panipat Refinery 
 
 
Department           Unit       Document No      Revision No                       Date of issue          
Production            AVU             PN/AVU/OM/1                 03                                 April - 2004 
 
  Prepared by                                          Checked by                                        Approved by 
 
S.K.M Rahman                            A.K Pandian                                       Vijay Prakash 
   ( DMPN )                                          ( SPNM )                                            ( CPNM ) 
 Chapter No 5                          Page No 1
 
 
 
 
 
 
 
 
 
 
 
 
 
                                                    CHAPTER-5 
 
CHEMICALS & UTILITIES 
 
  Panipat Refinery 
 
 
Department           Unit       Document No      Revision No                       Date of issue          
Production            AVU             PN/AVU/OM/1                 03                                 April - 2004 
 
  Prepared by                                          Checked by                                        Approved by 
 
S.K.M Rahman                            A.K Pandian                                       Vijay Prakash 
   ( DMPN )                                          ( SPNM )                                            ( CPNM ) 
 Chapter No 5                          Page No 2
5.1   CHEMICAL INJECTION FACILITIES (REFER DRG. NO. AVU/32)  : 
 
For protection of Atmospheric tower overhead system, facilities have been provided to 
inject Caustic solution into Crude.   Combination of Ammonia and Corrosion Inhibition is 
injected into overhead of Crude and Vacuum columns to combat overhead corrosion. 
 
A. CAUSTIC INJECTION : 
The corrosion in Atmospheric column overhead system is primarily due to                                  
hydrogen chloride evolved during distillation. The chloride salts remaining in the Crude 
after desalting get hydrolised into HCl. It attacks the top section of the column and 
overhead system. Magnesium chloride is the most prolific producer of HCl with calcium 
and sodium in descending order. Caustic is dozed in predesalter crude to neutralize free 
napthenic acid present in crude. It is dozed in post desalter crude to neutralize the acids 
formed due to hydrolysis of calcium and magnesium salts in desalter.  
The injection of Caustic is normally done at desalter outlet and is regulated by monitoring 
chloride content in 03-V-002 boot water which should remain below 20 PPM. The normal 
dosing rate of Caustic is required of the order of 2-4 PPM on Crude with 03-P-MT-
033A/B. It may be noted that Caustic injection to Crude is to be restricted at Max. 4 PPM 
as high Caustic injection rate may lead to fouling of Vacuum and Visbreaker furnaces.  
Hence it is recommended to maintain Caustic strength < 1.0 % wt. 
 
 B.  CAUSTIC SOLUTION FOR CAUSTIC WASH.  : 
Provision to dilute 20% wt. Caustic from off sites to 12.5% wt. solution in the caustic tank 
03-V-10 is provided.Pump 03-P-37 is used for transferring the caustic to LPG and naphtha 
caustic wash vessels whenever required 
 
C.    AMMONIA INJECTION  : 
The requirement of Ammonia injection is to neutralize the HCL (hydrochloric acid) formed 
due to decomposition of mainly calcium and magnesium chlorides present in the crude oil 
at the initial condensation point of water i.e at crude and vacuum overhead system. It is 
measured by maintaining pH of reflux drum boot-water. Normal Ammonia injection should 
be around 0.5 PPM on Crude. With 03-P-MT-034A/B injection rate should be adjusted 
time to time to maintain to pH in the range of 6.3 to 6.7. Recommended strength of 
Ammonia solution to be maintained is max. 1.0% wt. Facility has also been given to inject 
Ammonia at overhead of 04-C-001. However the injection is guided by hot well water pH. 
Page 3


 
  Panipat Refinery 
 
 
Department           Unit       Document No      Revision No                       Date of issue          
Production            AVU             PN/AVU/OM/1                 03                                 April - 2004 
 
  Prepared by                                          Checked by                                        Approved by 
 
S.K.M Rahman                            A.K Pandian                                       Vijay Prakash 
   ( DMPN )                                          ( SPNM )                                            ( CPNM ) 
 Chapter No 5                          Page No 1
 
 
 
 
 
 
 
 
 
 
 
 
 
                                                    CHAPTER-5 
 
CHEMICALS & UTILITIES 
 
  Panipat Refinery 
 
 
Department           Unit       Document No      Revision No                       Date of issue          
Production            AVU             PN/AVU/OM/1                 03                                 April - 2004 
 
  Prepared by                                          Checked by                                        Approved by 
 
S.K.M Rahman                            A.K Pandian                                       Vijay Prakash 
   ( DMPN )                                          ( SPNM )                                            ( CPNM ) 
 Chapter No 5                          Page No 2
5.1   CHEMICAL INJECTION FACILITIES (REFER DRG. NO. AVU/32)  : 
 
For protection of Atmospheric tower overhead system, facilities have been provided to 
inject Caustic solution into Crude.   Combination of Ammonia and Corrosion Inhibition is 
injected into overhead of Crude and Vacuum columns to combat overhead corrosion. 
 
A. CAUSTIC INJECTION : 
The corrosion in Atmospheric column overhead system is primarily due to                                  
hydrogen chloride evolved during distillation. The chloride salts remaining in the Crude 
after desalting get hydrolised into HCl. It attacks the top section of the column and 
overhead system. Magnesium chloride is the most prolific producer of HCl with calcium 
and sodium in descending order. Caustic is dozed in predesalter crude to neutralize free 
napthenic acid present in crude. It is dozed in post desalter crude to neutralize the acids 
formed due to hydrolysis of calcium and magnesium salts in desalter.  
The injection of Caustic is normally done at desalter outlet and is regulated by monitoring 
chloride content in 03-V-002 boot water which should remain below 20 PPM. The normal 
dosing rate of Caustic is required of the order of 2-4 PPM on Crude with 03-P-MT-
033A/B. It may be noted that Caustic injection to Crude is to be restricted at Max. 4 PPM 
as high Caustic injection rate may lead to fouling of Vacuum and Visbreaker furnaces.  
Hence it is recommended to maintain Caustic strength < 1.0 % wt. 
 
 B.  CAUSTIC SOLUTION FOR CAUSTIC WASH.  : 
Provision to dilute 20% wt. Caustic from off sites to 12.5% wt. solution in the caustic tank 
03-V-10 is provided.Pump 03-P-37 is used for transferring the caustic to LPG and naphtha 
caustic wash vessels whenever required 
 
C.    AMMONIA INJECTION  : 
The requirement of Ammonia injection is to neutralize the HCL (hydrochloric acid) formed 
due to decomposition of mainly calcium and magnesium chlorides present in the crude oil 
at the initial condensation point of water i.e at crude and vacuum overhead system. It is 
measured by maintaining pH of reflux drum boot-water. Normal Ammonia injection should 
be around 0.5 PPM on Crude. With 03-P-MT-034A/B injection rate should be adjusted 
time to time to maintain to pH in the range of 6.3 to 6.7. Recommended strength of 
Ammonia solution to be maintained is max. 1.0% wt. Facility has also been given to inject 
Ammonia at overhead of 04-C-001. However the injection is guided by hot well water pH. 
 
  Panipat Refinery 
 
 
Department           Unit       Document No      Revision No                       Date of issue          
Production            AVU             PN/AVU/OM/1                 03                                 April - 2004 
 
  Prepared by                                          Checked by                                        Approved by 
 
S.K.M Rahman                            A.K Pandian                                       Vijay Prakash 
   ( DMPN )                                          ( SPNM )                                            ( CPNM ) 
 Chapter No 5                          Page No 3
The ammonia solution is normally prepared in DM water. Facility is also there to prepare 
the solution with fresh water (service water). 
 
D.  CORROSION INHIBITOR  : 
 
A solution of Corrosion inhibitor in kerosene/ heavy naphtha is required to be properly dispersed 
in vapor stream to combat corrosion of overhead system. 
1. Corrosion inhibitor is discharged from drums by hand operated pump to tank 03-V-008, where 
the inhibitor & heavy naphtha, supplied from heavy naphtha run down line,is mixed with vessel 
mixer  thoroughly. 
2. Diluted Corrosion inhibitor 1-2% wt. is injected by 03-P-MT-031A/B to Atmospheric and 
Vacuum columns. Recommended dosing rate is 12-15 PPM on overhead product flow. 
 
E. DEMULSIFIER  : 
 
1. Demulsifier is used for breaking the emulsion of water & crude to ensure proper desalting 
and minimum carry over of oil along with brine.  Oil soluble de-emulsifier is always 
preferred. There also exists facility to route kerosene to demulsifier vessel to increase 
solubility. ( Presently neat dosing of demulsifier is being done ) 
2. Demulsifier is injected with the help of 03-P-MT-032A/B @ 6-8 PPM on crude. Facility is 
provided to inject demulsifier up stream of desalters as well as up stream of crude charge 
pump. 
 
F. TRISODIUM PHOSPHATE   : 
 
Trisodium Phosphate is dosed to maintain pH in the range of 8-9 in boiler (steam generator) 
drums. It also forms a magnetite layer inside the drum & tubes to prevent corrosion. 
     Trisodium phosphate bag is unloaded in 03-V-32 where there is a provision to make the     
      solution   5-10% wt. by adding DM water. 
     Trisodium Phosphate is injected with the help of 03-P-MT-043A/B @ 5 PPM of BFW make   
     up.  
 As per our experience of running the unit for past few years the guidelines for chemical 
preparation and dosing are as under: 
 
 
Page 4


 
  Panipat Refinery 
 
 
Department           Unit       Document No      Revision No                       Date of issue          
Production            AVU             PN/AVU/OM/1                 03                                 April - 2004 
 
  Prepared by                                          Checked by                                        Approved by 
 
S.K.M Rahman                            A.K Pandian                                       Vijay Prakash 
   ( DMPN )                                          ( SPNM )                                            ( CPNM ) 
 Chapter No 5                          Page No 1
 
 
 
 
 
 
 
 
 
 
 
 
 
                                                    CHAPTER-5 
 
CHEMICALS & UTILITIES 
 
  Panipat Refinery 
 
 
Department           Unit       Document No      Revision No                       Date of issue          
Production            AVU             PN/AVU/OM/1                 03                                 April - 2004 
 
  Prepared by                                          Checked by                                        Approved by 
 
S.K.M Rahman                            A.K Pandian                                       Vijay Prakash 
   ( DMPN )                                          ( SPNM )                                            ( CPNM ) 
 Chapter No 5                          Page No 2
5.1   CHEMICAL INJECTION FACILITIES (REFER DRG. NO. AVU/32)  : 
 
For protection of Atmospheric tower overhead system, facilities have been provided to 
inject Caustic solution into Crude.   Combination of Ammonia and Corrosion Inhibition is 
injected into overhead of Crude and Vacuum columns to combat overhead corrosion. 
 
A. CAUSTIC INJECTION : 
The corrosion in Atmospheric column overhead system is primarily due to                                  
hydrogen chloride evolved during distillation. The chloride salts remaining in the Crude 
after desalting get hydrolised into HCl. It attacks the top section of the column and 
overhead system. Magnesium chloride is the most prolific producer of HCl with calcium 
and sodium in descending order. Caustic is dozed in predesalter crude to neutralize free 
napthenic acid present in crude. It is dozed in post desalter crude to neutralize the acids 
formed due to hydrolysis of calcium and magnesium salts in desalter.  
The injection of Caustic is normally done at desalter outlet and is regulated by monitoring 
chloride content in 03-V-002 boot water which should remain below 20 PPM. The normal 
dosing rate of Caustic is required of the order of 2-4 PPM on Crude with 03-P-MT-
033A/B. It may be noted that Caustic injection to Crude is to be restricted at Max. 4 PPM 
as high Caustic injection rate may lead to fouling of Vacuum and Visbreaker furnaces.  
Hence it is recommended to maintain Caustic strength < 1.0 % wt. 
 
 B.  CAUSTIC SOLUTION FOR CAUSTIC WASH.  : 
Provision to dilute 20% wt. Caustic from off sites to 12.5% wt. solution in the caustic tank 
03-V-10 is provided.Pump 03-P-37 is used for transferring the caustic to LPG and naphtha 
caustic wash vessels whenever required 
 
C.    AMMONIA INJECTION  : 
The requirement of Ammonia injection is to neutralize the HCL (hydrochloric acid) formed 
due to decomposition of mainly calcium and magnesium chlorides present in the crude oil 
at the initial condensation point of water i.e at crude and vacuum overhead system. It is 
measured by maintaining pH of reflux drum boot-water. Normal Ammonia injection should 
be around 0.5 PPM on Crude. With 03-P-MT-034A/B injection rate should be adjusted 
time to time to maintain to pH in the range of 6.3 to 6.7. Recommended strength of 
Ammonia solution to be maintained is max. 1.0% wt. Facility has also been given to inject 
Ammonia at overhead of 04-C-001. However the injection is guided by hot well water pH. 
 
  Panipat Refinery 
 
 
Department           Unit       Document No      Revision No                       Date of issue          
Production            AVU             PN/AVU/OM/1                 03                                 April - 2004 
 
  Prepared by                                          Checked by                                        Approved by 
 
S.K.M Rahman                            A.K Pandian                                       Vijay Prakash 
   ( DMPN )                                          ( SPNM )                                            ( CPNM ) 
 Chapter No 5                          Page No 3
The ammonia solution is normally prepared in DM water. Facility is also there to prepare 
the solution with fresh water (service water). 
 
D.  CORROSION INHIBITOR  : 
 
A solution of Corrosion inhibitor in kerosene/ heavy naphtha is required to be properly dispersed 
in vapor stream to combat corrosion of overhead system. 
1. Corrosion inhibitor is discharged from drums by hand operated pump to tank 03-V-008, where 
the inhibitor & heavy naphtha, supplied from heavy naphtha run down line,is mixed with vessel 
mixer  thoroughly. 
2. Diluted Corrosion inhibitor 1-2% wt. is injected by 03-P-MT-031A/B to Atmospheric and 
Vacuum columns. Recommended dosing rate is 12-15 PPM on overhead product flow. 
 
E. DEMULSIFIER  : 
 
1. Demulsifier is used for breaking the emulsion of water & crude to ensure proper desalting 
and minimum carry over of oil along with brine.  Oil soluble de-emulsifier is always 
preferred. There also exists facility to route kerosene to demulsifier vessel to increase 
solubility. ( Presently neat dosing of demulsifier is being done ) 
2. Demulsifier is injected with the help of 03-P-MT-032A/B @ 6-8 PPM on crude. Facility is 
provided to inject demulsifier up stream of desalters as well as up stream of crude charge 
pump. 
 
F. TRISODIUM PHOSPHATE   : 
 
Trisodium Phosphate is dosed to maintain pH in the range of 8-9 in boiler (steam generator) 
drums. It also forms a magnetite layer inside the drum & tubes to prevent corrosion. 
     Trisodium phosphate bag is unloaded in 03-V-32 where there is a provision to make the     
      solution   5-10% wt. by adding DM water. 
     Trisodium Phosphate is injected with the help of 03-P-MT-043A/B @ 5 PPM of BFW make   
     up.  
 As per our experience of running the unit for past few years the guidelines for chemical 
preparation and dosing are as under: 
 
 
 
  Panipat Refinery 
 
 
Department           Unit       Document No      Revision No                       Date of issue          
Production            AVU             PN/AVU/OM/1                 03                                 April - 2004 
 
  Prepared by                                          Checked by                                        Approved by 
 
S.K.M Rahman                            A.K Pandian                                       Vijay Prakash 
   ( DMPN )                                          ( SPNM )                                            ( CPNM ) 
 Chapter No 5                          Page No 4
5.1.1 GUIDE LINES FOR PREPARATION AND DOSING OF CHEMICALS   : 
  
 
 
CHEMICAL 
PREPARATION DOSING REMARKS 
Drum or cyls to  
be added per tank 
Soln.  
strength 
Pump stroke Lits/ 
hr 
Ammonia 1 cyl (50-60 kg) 2.5 % CDU 
LS-40 % 
HS-65% 
VDU 
      LS-20 % 
     HS-35% 
 
40 
65 
 
20 
35 
Minor adjustment of 
Pump stroke to be 
done after seeing the 
PH of 03-V-2 sour 
water and 04-V-01 
sour water.(PH= 6.3-
6.7) 
Corrosion 
inhibitor 
½ drum 4 % CDU 
65 % 
VDU 
35 % 
 
65 
 
35 
Minor adjustment of 
Pump stroke to be 
done after seeing the 
iron content of sour 
water.   ( Iron cont= 
<1.0 PPM) 
Demulsifier ½ Drum 4 % 25 25 Minor adjustment of 
Pump stroke to be 
done after seeing the 
actual visual brine 
quality/lab result (oil 
content in brine < 50 
PPM ) 
 
 
Note :  
1. Caustic is to be replaced in 03 V - 15, 03 V -18, 19 V -201, 19 V -202 when the caustic 
strength becomes less than 5 % 
2. Water in 03 V -16, 03 V -19 is to be replaced when the caustic strength in the above water 
becomes more than 5 % 
3. Normal caustic strength in 03 V -10 is 12 -13 %. Caustic is transferred from 03 V-10 to 03 V 
-7 A/B to make a solution of strength 1 % which is injected into crude.  
 
Page 5


 
  Panipat Refinery 
 
 
Department           Unit       Document No      Revision No                       Date of issue          
Production            AVU             PN/AVU/OM/1                 03                                 April - 2004 
 
  Prepared by                                          Checked by                                        Approved by 
 
S.K.M Rahman                            A.K Pandian                                       Vijay Prakash 
   ( DMPN )                                          ( SPNM )                                            ( CPNM ) 
 Chapter No 5                          Page No 1
 
 
 
 
 
 
 
 
 
 
 
 
 
                                                    CHAPTER-5 
 
CHEMICALS & UTILITIES 
 
  Panipat Refinery 
 
 
Department           Unit       Document No      Revision No                       Date of issue          
Production            AVU             PN/AVU/OM/1                 03                                 April - 2004 
 
  Prepared by                                          Checked by                                        Approved by 
 
S.K.M Rahman                            A.K Pandian                                       Vijay Prakash 
   ( DMPN )                                          ( SPNM )                                            ( CPNM ) 
 Chapter No 5                          Page No 2
5.1   CHEMICAL INJECTION FACILITIES (REFER DRG. NO. AVU/32)  : 
 
For protection of Atmospheric tower overhead system, facilities have been provided to 
inject Caustic solution into Crude.   Combination of Ammonia and Corrosion Inhibition is 
injected into overhead of Crude and Vacuum columns to combat overhead corrosion. 
 
A. CAUSTIC INJECTION : 
The corrosion in Atmospheric column overhead system is primarily due to                                  
hydrogen chloride evolved during distillation. The chloride salts remaining in the Crude 
after desalting get hydrolised into HCl. It attacks the top section of the column and 
overhead system. Magnesium chloride is the most prolific producer of HCl with calcium 
and sodium in descending order. Caustic is dozed in predesalter crude to neutralize free 
napthenic acid present in crude. It is dozed in post desalter crude to neutralize the acids 
formed due to hydrolysis of calcium and magnesium salts in desalter.  
The injection of Caustic is normally done at desalter outlet and is regulated by monitoring 
chloride content in 03-V-002 boot water which should remain below 20 PPM. The normal 
dosing rate of Caustic is required of the order of 2-4 PPM on Crude with 03-P-MT-
033A/B. It may be noted that Caustic injection to Crude is to be restricted at Max. 4 PPM 
as high Caustic injection rate may lead to fouling of Vacuum and Visbreaker furnaces.  
Hence it is recommended to maintain Caustic strength < 1.0 % wt. 
 
 B.  CAUSTIC SOLUTION FOR CAUSTIC WASH.  : 
Provision to dilute 20% wt. Caustic from off sites to 12.5% wt. solution in the caustic tank 
03-V-10 is provided.Pump 03-P-37 is used for transferring the caustic to LPG and naphtha 
caustic wash vessels whenever required 
 
C.    AMMONIA INJECTION  : 
The requirement of Ammonia injection is to neutralize the HCL (hydrochloric acid) formed 
due to decomposition of mainly calcium and magnesium chlorides present in the crude oil 
at the initial condensation point of water i.e at crude and vacuum overhead system. It is 
measured by maintaining pH of reflux drum boot-water. Normal Ammonia injection should 
be around 0.5 PPM on Crude. With 03-P-MT-034A/B injection rate should be adjusted 
time to time to maintain to pH in the range of 6.3 to 6.7. Recommended strength of 
Ammonia solution to be maintained is max. 1.0% wt. Facility has also been given to inject 
Ammonia at overhead of 04-C-001. However the injection is guided by hot well water pH. 
 
  Panipat Refinery 
 
 
Department           Unit       Document No      Revision No                       Date of issue          
Production            AVU             PN/AVU/OM/1                 03                                 April - 2004 
 
  Prepared by                                          Checked by                                        Approved by 
 
S.K.M Rahman                            A.K Pandian                                       Vijay Prakash 
   ( DMPN )                                          ( SPNM )                                            ( CPNM ) 
 Chapter No 5                          Page No 3
The ammonia solution is normally prepared in DM water. Facility is also there to prepare 
the solution with fresh water (service water). 
 
D.  CORROSION INHIBITOR  : 
 
A solution of Corrosion inhibitor in kerosene/ heavy naphtha is required to be properly dispersed 
in vapor stream to combat corrosion of overhead system. 
1. Corrosion inhibitor is discharged from drums by hand operated pump to tank 03-V-008, where 
the inhibitor & heavy naphtha, supplied from heavy naphtha run down line,is mixed with vessel 
mixer  thoroughly. 
2. Diluted Corrosion inhibitor 1-2% wt. is injected by 03-P-MT-031A/B to Atmospheric and 
Vacuum columns. Recommended dosing rate is 12-15 PPM on overhead product flow. 
 
E. DEMULSIFIER  : 
 
1. Demulsifier is used for breaking the emulsion of water & crude to ensure proper desalting 
and minimum carry over of oil along with brine.  Oil soluble de-emulsifier is always 
preferred. There also exists facility to route kerosene to demulsifier vessel to increase 
solubility. ( Presently neat dosing of demulsifier is being done ) 
2. Demulsifier is injected with the help of 03-P-MT-032A/B @ 6-8 PPM on crude. Facility is 
provided to inject demulsifier up stream of desalters as well as up stream of crude charge 
pump. 
 
F. TRISODIUM PHOSPHATE   : 
 
Trisodium Phosphate is dosed to maintain pH in the range of 8-9 in boiler (steam generator) 
drums. It also forms a magnetite layer inside the drum & tubes to prevent corrosion. 
     Trisodium phosphate bag is unloaded in 03-V-32 where there is a provision to make the     
      solution   5-10% wt. by adding DM water. 
     Trisodium Phosphate is injected with the help of 03-P-MT-043A/B @ 5 PPM of BFW make   
     up.  
 As per our experience of running the unit for past few years the guidelines for chemical 
preparation and dosing are as under: 
 
 
 
  Panipat Refinery 
 
 
Department           Unit       Document No      Revision No                       Date of issue          
Production            AVU             PN/AVU/OM/1                 03                                 April - 2004 
 
  Prepared by                                          Checked by                                        Approved by 
 
S.K.M Rahman                            A.K Pandian                                       Vijay Prakash 
   ( DMPN )                                          ( SPNM )                                            ( CPNM ) 
 Chapter No 5                          Page No 4
5.1.1 GUIDE LINES FOR PREPARATION AND DOSING OF CHEMICALS   : 
  
 
 
CHEMICAL 
PREPARATION DOSING REMARKS 
Drum or cyls to  
be added per tank 
Soln.  
strength 
Pump stroke Lits/ 
hr 
Ammonia 1 cyl (50-60 kg) 2.5 % CDU 
LS-40 % 
HS-65% 
VDU 
      LS-20 % 
     HS-35% 
 
40 
65 
 
20 
35 
Minor adjustment of 
Pump stroke to be 
done after seeing the 
PH of 03-V-2 sour 
water and 04-V-01 
sour water.(PH= 6.3-
6.7) 
Corrosion 
inhibitor 
½ drum 4 % CDU 
65 % 
VDU 
35 % 
 
65 
 
35 
Minor adjustment of 
Pump stroke to be 
done after seeing the 
iron content of sour 
water.   ( Iron cont= 
<1.0 PPM) 
Demulsifier ½ Drum 4 % 25 25 Minor adjustment of 
Pump stroke to be 
done after seeing the 
actual visual brine 
quality/lab result (oil 
content in brine < 50 
PPM ) 
 
 
Note :  
1. Caustic is to be replaced in 03 V - 15, 03 V -18, 19 V -201, 19 V -202 when the caustic 
strength becomes less than 5 % 
2. Water in 03 V -16, 03 V -19 is to be replaced when the caustic strength in the above water 
becomes more than 5 % 
3. Normal caustic strength in 03 V -10 is 12 -13 %. Caustic is transferred from 03 V-10 to 03 V 
-7 A/B to make a solution of strength 1 % which is injected into crude.  
 
 
  Panipat Refinery 
 
 
Department           Unit       Document No      Revision No                       Date of issue          
Production            AVU             PN/AVU/OM/1                 03                                 April - 2004 
 
  Prepared by                                          Checked by                                        Approved by 
 
S.K.M Rahman                            A.K Pandian                                       Vijay Prakash 
   ( DMPN )                                          ( SPNM )                                            ( CPNM ) 
 Chapter No 5                          Page No 5
5.2 UTILITIES  : 
 
 Utility / Auxiliary system consists of air, water, stream, fuel oil, fuel gas, flare, blow down,  
special drainage, effluent, flushing oil etc. Brief description of the facility provided for each 
system is described below. 
 
     UTILITIES REQUIREMENT : 
 
UTILITY UNITS AM BH 
    
Cooling water M3/hr 3751.4 2853.9 
Fuel MM Kcal/hr  107.4  116.14 
Instrument Air  NM
3
 /hr 350.0 350.0 
Plant Air NM
3
 /hr Intermittent intermittent 
 FW M3/hr 25.7 11.5 
DM water circulation M3/hr 200 200 
Installed Power KW 7820.1 7681.0 
Service water M3/hr 121 121 
Offsites MP steam import          
(14.0 kg/cm2 (g) and 290º C) 
MT/hr 63.6 33.9 
Offsites LP steam import             
(4.0 kg/cm
2
 (g) and 175º C) 
MT/hr  1.863 0.663 
Internal LP steam Generation 
(4.0 kg/cm
2
 (g) and 151º C) 
MT/HR 4.8 4.8 
Internal MP steam Generation 
(14.0 kg/cm2 (g) and 210º C) 
MT/hr 12.9 5.7 
 
5.2. 1  INSTRUMENT AIR (REFER DRG. NO. AVU/33)  : 
 
To cater to the requirements of dry/clean air for instrument, 3” 150 class carbon steel 
header is provided with a block valve & spectacle blind at the battery limit. Various 
tappings from the instrument air header have been taken to supply air to instruments. 
 
 
Read More
Offer running on EduRev: Apply code STAYHOME200 to get INR 200 off on our premium plan EduRev Infinity!