Vendor Validation Procedure for an automatic a powder coat plant

  1. Initial response to the enquiry
  2. Cooperation during technical negotiations
  3. Commitment to technical meetings and discussions
  4. Technical representation
  5. Managerial competency of the sales person
  6. Support to technical visits for vendor evaluation
  7. Responses to technical queries
  8. Infrastructure
  9. Design team
  10. Conveyor loop
  11. Space occupied by powder coat curing oven
  12. Tanks and tunnels fabrication
  13. Provision for under volume production
  14. Heat exchanger
  15. Oven type
  16. Conveyor system
  17. Conveyor length
  18. Conveyor speed
  19. Conveyor guard
  20. Maximum height of the conveyor
  21. Minimum height of the conveyor
  22. Conveyor pitch
  23. Water flow calculation and management
  24. System compatibility with spray type Nanocoating pretreatment
  25. Selection of appropriate nozzles for spray nano pretreatment
  26. Compressors
  27. Gas burner
  28. Gas alarming system monitor
  29. Enclosure in with forced cooling after water dry oven
  30. Enclosure for powder coat booth with temperature and air regulation

Toluene Specification

MATERIAL SPECIFICATION

1. PRODUCT

Product Name: TOLUENE

Product Description: Toluene

2. COMPOSITION / INFORMATION ON INGREDIENTS

Synonyms: Methyl benzene

CAS NO.: 108-88-3                                                                                 

Composition: Toluene

3. PHYSICAL AND CHEMICAL PROPERTIES

S.NO. PARAMETERS SPECIFICATION TEST METHOD
  Physical state Liquid Visual
  Colour Water white Visual
  Clarity Clear Visual
  Specific gravity at 30o C 0.870 – 0.874 ASTM D 4052
  Water solubility Insoluble Visual
  Distillation range 110˚C to 111˚C ASTM D 86
  Flash point, Closed cup 4.4o C ASTM D 93
  Non-aromatic 2000 ppm by wt. max. ASTM D 2360
  Sulphur content Nil ASTM D 3120
  Copper corrosion Passes ASTM 849

Solvent CIX Specification

1. PRODUCT

Product Name: SOLVENT C-9

Product Description: Mixture of aromatic hydrocarbon solvents

2. COMPOSITION / INFORMATION ON INGREDIENTS

Synonyms: Solvent naphtha

CAS NO.: 64742-94-5                                                                              

Composition: Mixture of aromatic hydrocarbon solvents

3. PHYSICAL AND CHEMICAL PROPERTIES

S.NO. PARAMETERS SPECIFICATION TEST METHOD
  Physical state Liquid Visual
  Colour Water white Visual
  Clarity Clear Visual
  Specific gravity at 30o C 0.875 ASTM D 4052
  Water solubility Insoluble Visual
  Distillation range 170˚C to 205˚C ASTM D 86
  Flash point, Abel apparatus 42o C ASTM D 93
  Mixed Aniline point 14 o C ASTM D 611
  Aromatic contents, max 99% by wt  
  Doctor Test Passes ASTM D 4952
  Sulphur content <1mg /kg ASTM D 3120

Petroleum Fluids

Chemical classification of petroleum fluids

  • Petroleum fluids are complex multi-component mixtures.
  • The chemical constituents of petroleum may be classified broadly as belonging either to the C6- or the C6+ fraction.
  • The light end, or C6- fraction, of petroleum fluids is composed of well-defined pure hydrocarbon components with carbon numbers up to 5 and the light gases nitrogen (N2), carbon dioxide (CO2), and hydrogen sulfide (H2S).
  • The hydrocarbons in the light end primarily are straight-chain normal alkanes (n-alkanes) and their branched isomers (i-alkanes).
  • The heavy end, or C6+ fraction, consists of all the components with carbon numbers of 6 or greater.

Classification of petroleum constituents

A classification system and nomenclature commonly used in the petroleum industry describes components as belonging to the paraffinic (P), naphthenic (N), or aromatic (A) fractions. These are often referred to jointly as PNA.

Paraffins

This class includes n-alkanes and i-alkanes that consist of chains of hydrocarbon segments (-CH2-, -CH3) connected by single bonds. Methane (CH4) is the simplest paraffin and the most common compound in petroleum reservoir fluids. The majority of components present in solid wax deposits are high-molecular-weight paraffins.

Naphthenes

This class includes the cycloalkanes, which are hydrocarbons similar to paraffins but contain one or more cyclic structures. The elements of the cyclic structures are joined by single bonds. Naphthenes make up a large part of microcrystalline waxes.

Aromatics

This class includes all compounds that contain one or more ring structures similar to benzene (C6H6). The carbon atoms in the ring structure are connected by six identical bonds that are intermediate between single and double bonds, which are referred to as:

  • Hybrid bonds
  • Aromatic double bonds
  • Benzene bonds

Resins and asphaltenes

Resins and asphaltenes primarily are a subclass of the aromatics, although some resins may contain only naphthenic rings. They are large molecules consisting primarily of hydrogen and carbon, with one to three sulfur, oxygen, or nitrogen atoms per molecule. The basic structure is composed of rings, mainly aromatics, with three to ten or more rings per molecule.

SARA classification of petroleum constituents

The components of the heavy fraction of a petroleum fluid can be separated into four groups: saturates, aromatics, resins, and asphaltenes (SARA).

  • Saturates include all hydrocarbon components with saturated (single-bonded) carbon atoms. These are the n-alkanes, i-alkanes, and cycloalkanes (naphthenes).
  • Aromatics include benzene and all the derivatives composed of one or more benzene rings.
  • Resins are components with a highly polar end group and long alkane tails. The polar end group is composed of aromatic and naphthenic rings and often contains heteroatoms such as oxygen, sulfur, and nitrogen. Pure resins are heavy liquids or sticky solids.
  • Asphaltenes are large highly polar components made up of condensed aromatic and naphthenic rings, which also contain heteroatoms. Pure asphaltenes are black, nonvolatile powders.

The experimental method used to determine the weight fractions of these groups is called SARA analysis.

Asphaltene characteristics

Nature of asphaltenes

  • Asphaltenes are a solubility class that is soluble in light aromatics such as benzene and toluene but is insoluble in lighter paraffins. 
  • They normally are classified by the particular paraffin used to precipitate them from crude (e.g., n-pentane or n-heptane). 
  • Mitchell and Speight showed that different alkane solvents yield different amounts of precipitates. 
  • Speight showed dependence of the aromaticity and molecular weight of asphaltene on the precipitating solvent.
  • They also indicated that the amounts and natures of asphaltenes precipitated with n-heptane or heavier alkanes are very similar.
  • Speight, Long and Trowbridge provides a summary of standard analytical methods for asphaltene separation with either n-pentane or n-heptane.

Asphaltenes and waxes

  • Deposition of the high-molecular-weight components of petroleum fluids as solid precipitates in surface facilities, pipelines, downhole tubulars, and within the reservoir are well-recognized production problems.
  • Depending on the reservoir fluid and the type of recovery process, the deposited solid may consist of:
    • Asphaltenes
    • Waxes
    • A mixture of these materials
  • The deposits also can contain resins, crude oil, fines, scales, and water.
  • Asphaltenes and waxes are a general category of solids and, thus, cover a wide range of materials.
  • Understanding the fundamental characteristics that define the nature of asphaltenes and waxes is valuable in reducing or avoiding the production impacts of their deposition.

Mineral Turpentine Oil Specification

1. PRODUCT

Product Name: MTO (Mineral Turpentine Oil)

Product Description: Mixture of aliphatic hydrocarbon solvents

2. COMPOSITION / INFORMATION ON INGREDIENTS

Synonyms: White spirit

CAS NO.: 8006-64-2                                                                               

Composition: Mixture of aromatic hydrocarbon solvents

3. PHYSICAL AND CHEMICAL PROPERTIES

S.NO. PARAMETERS SPECIFICATION TEST METHOD
  Physical state Liquid Visual
  Colour Water white Visual
  Clarity Clear Visual
  Specific gravity at 30o C 0.785 ASTM D 4052
  Water solubility Insoluble Visual
  Distillation range 125˚C to 240˚C ASTM D 86
  Flash point, Abel apparatus 30o C ASTM D 93
  Aromatic contents, max 40% by V  
  Copper strip corrosion at 50oC for corrosion Nil IS:1745-1978

Mixed Xylene Specification

1. PRODUCT

Product Name: Mixed Xylene

Product Description: Aromatic Mixture of ortho xylene, meta xylene and para xylene

2. COMPOSITION / INFORMATION ON INGREDIENTS

Synonyms: Xylene

CAS NO.: 1330-20-7                                                                               

Composition: Mixture of aromatic hydrocarbon solvents

3. PHYSICAL AND CHEMICAL PROPERTIES

S.NO. PARAMETERS SPECIFICATION TEST METHOD
  Physical state Liquid Visual
  Colour Water white Visual
  Clarity Clear Visual
  Specific gravity at 30o C 0.865 – 0.875 ASTM D 4052
  Water solubility Insoluble Visual
  Distillation range 136˚C to 143˚C ASTM D 86
  Flash point, Abel apparatus 29o C ASTM D 93
  Doctor Test Passes ASTM D 4952
  Sulphur content <1mg /kg ASTM D 3120

Low aromatic solvent specification

1. PRODUCT

Product Name: Low aromatic solvent

Product Description: Mixture of aliphatic hydrocarbon solvents

2. COMPOSITION / INFORMATION ON INGREDIENTS

Synonyms: White spirit

CAS NO.: 8006-64-2                                                                               

Composition: Mixture of low aromatic hydrocarbon solvents

3. PHYSICAL AND CHEMICAL PROPERTIES

S.NO. PARAMETERS SPECIFICATION TEST METHOD
  Physical state Liquid Visual
  Colour Water white Visual
  Clarity Clear Visual
  Specific gravity at 30o C 0.785 ASTM D 4052
  Water solubility Insoluble Visual
  Distillation range 125˚C to 240˚C ASTM D 86
  Flash point, Abel apparatus 30o C ASTM D 93
  Aromatic contents, max 40% by V  
  Copper strip corrosion at 50oC for corrosion Nil IS:1745-1978

Characterisation of a Petroleum product

PHYSICAL METHODS

  1. Fractionation
  2. True boiling point distillation
  3. ASTM Distillation
  4. Simulated distillation by gas chromatography
  5. API Gravity
  6. Pour point
  7. Viscosity
  8. Refractive index
  9. Freezing point
  10. Aniline point
  11. Flash point
  12. Octane number
  13. Cetane number
  14. Smoke point
  15. Reid vapour pressure
  16. Water, salt sediment
  17. Molecular weight

CHEMICAL METHODS

  1. Elemental analysis
  2. Carbon residue
  3. Detailed hydrocarbon analysis
  4. Hydrocarbon family analysis
  5. Aromatic carbon content
  6. SARA analysis