1. ANTICORROSION COATINGS

2. INTRODUCTION
Company WCS General Trading F.Z.C. is a manufacturer of anticorrosion coatings.
     
Stable product quality is achieved using only high quality raw materials and implementation of quality control system according to ISO Proven and reliable equipment, which are equipped with our production sites in Russia and abroad, provides stable quality characteristics of each batch of each product. Manufacturing facilities also have R&D departments, which gives BIURS the ability, if necessary, either change the characteristics of existing products or to design a new product in a short period of time to meet clients’ requirements.

3. SYSTEM OF ANTICORROSION COATING “BIURS”
System of anti-corrosion coating (hereinafter referred as SAC) “BIURS” designed for insulation of underground and overhead oil and/or gas pipelines and for protection of fittings and valves at pumps and compressors stations.
SAC “BIURS” meets main requirements of “Technical requirements of OJSC “Gazprom” to external coatings based on thermoset materials for anti-corrosive protection of pipes, joining parts, valves and mounting units of pipelines with operational temperatures ranging from – 20oC to +100oC” as well as requirements of “Technical requirements of JSC “Transneft” to the coatings of shaped joining parts and latches of trunk pipelines” and GOST # P “Trunk steel pipelines”.
Protective coating is a system consisted of quick-setting primer named “Primer MB” and protective mastix named “BIUR” which have to be put sequentially onto prepared pipeline surface.
Preparation of a pipeline (metal) surface means removing rust residues and making surface rough to required extent by using sand-blasting or grit-blasting methods:
at field conditions – 2 according to GOST or not less than St 3 according to ISO with roughness of surface Rz micrometers
at factory (base) conditions – 1 according to GOST or not less than St 2 according to ISO with roughness of surface Rz micrometers
A pipeline surface should be degreased and clear from dust prior application of putting SAC “BIURS”.
 Primer “Primer MB” is a two-component system based on epoxy resin. The components of it are base and hardener. Before using the primer both its components have to be carefully mixed together by a mixer.
Application of the primer can be done either manually (by a brush, a roller etc) or mechanically by using vacuum sputtering unit at temperatures from +5oC to +50oC.
Important parameter in putting the primer is primer’s layer drying extent. It should be rested till “dry touch”. Meeting these conditions provides creating of chemical links between the primer and the mastix. The thickness of primer’s layer varies from 50 to 150 micrometers depending on operational conditions.

4. SYSTEM OF ANTICORROSION COATING “BIURS”
“Primer MB” can be used as independent coating against corrosion of steel surfaces which contact with oil, distillates, fresh and sea water, as well as a protective coating for main pipelines and internal surfaces of oil and fuel tanks.
Protective mastix “BUIR” should be applied only upon primer ”Primer MB” and works as a protection of the primer from mechanical damages while doing different operations with an object to be protected (such as moving, setting up, ripping-up and covering of a ditch). The mastix is based on modified polyurethane.
Application of the mastix is done by using hot vacuum spraying method with separate components feeding.
The thickness of mastix’s layer varies millimeters as per GOST
Time of ageing the coating before covering protected object into ground shouldn’t be less than 6-8 hours at +20oC. Full hardening is achieved within hours.
Lifetime of the coating is at least 20 years (in case all technical requirements are observed)

5. PROPERTIES OF SAC “BIURS”
PARAMETER
MAGNITUDE
MEASURING METHOD
Recommended operational temperature
From -40oC to +60oC -
Adhesion to steel at +20+5oC using tear-off method, MPa
Not less than 7
GOST 14760
Adhesion to steel at +20+5oC using normal tear-off method, MPa after exposure in water for 1000 hours at different water temperatures:
20+5oC
40+5oC
60+5oC
80+5oC
Not less than 7 5 4
Resistance to cathode peeling (raduis increase, mm or square of peeling, cm2)
@20+5oC
@40+5oC
@60+5oC
@80+5oC 6 9 10
GOST P (Appendix B)
Intermediate electric resistance of coating, Om-m2
1x1010
GOST P (Appendix G)
Intermediate electric resistance change, Om-m2 after exposure into 3% NaCl brine
No changes
GOST R (Appendix G)
Resistance to penetration (extrusion), mm
0,3
GOST P (Appendix E)
Tensile strength of peeled coating film @25+5oC, MPa 12
GOST P 11262
(Appendix B. paragraph 1)
Tensile strengh of peeled coating film while %
Not less than 65

6. PROPERTIES OF SAC “BIURS”
PARAMETER
MAGNITUDE
MEASURING METHOD
Tensile strain of peeled coating film while % after exposure in water at different water temperatures:
20+5oC
40+5oC
60+5oC
80+5oC
Not less than 65
GOST P 11262
(Appendix B. paragraph 1)
Water absorbing, % of peeled coating film after exposure in water for 1000 hours at different water temperatures:
Not more than 5
GOST P 4650
Coating resistance to impacts within temperature range 40oC to 60 oC, J/mm
Not less than 50
GOST P (Appendix A)
Packaging.
The components of SAC “BIURS” are supplied in sets.
- Base of “BIUR” mastix kg
-Hardener of “BIUR” mastix kg
- Base of “Primer MB” primer 9,9 kg
Hardener of “Primer MB” primer 7,1 kg
The set consists of 2 metal drums of 10 and 20 liters capacity (primer components) along with 2 metal drums of 100 liters capacity (mastix components). Nett weight of the set is
182 kg.

7. PRIMER MB PROTECTIVE COATING
Primer “Primer MB” (hereinafter referred as Primer MB) is two-component quick-setting system based on epoxy resin. Primer MB can be used as independent coating for protection against corrosion of steel surfaces which contact with oil, distillates, fresh and sea water, as well as a protective covering for trunk pipelines and external/internal surfaces of oil and fuel tanks. It also can be used in outdoor insulation operations as primer layer before coloring by any material which is compatible with epoxy resin (e.g. paints, enamels, lacquer etc). It is allowed to use Primer MB coating in potable cold water pipelines. Cured product is environmentally safe due to absence of heavy metals and other harmful substances.
Protective coating Primer MB consists of one or several layers of quick-setting primer, which are put sequentially onto prepared surface. The thickness of primer’s layer varies from 50 to 150 micrometers depending on operational conditions. Application of the primer can be done either manually (by a brush, a roller etc) or mechanically by using vacuum sputtering unit at temperatures from +5oC to +50oC.
Preparation of a surface means removing rust residues by using sand-blasting or grit-blasting methods and making surface rough to certain extent.

8. PROPERTIES OF PRIMER MB COATING1
Type of product
Epoxy system with high solid residual content 2
Recommended areas of application
As a primer in SAC “BIURS” for external insulation of pipelines, joining parts, fittings, valves and tanks.
As a standalone coating for internal/external protection of steel pipelines and reservoirs. 3
Components ratio
Ground/hardener – 1 to 0,72 by mass or 1 to 0,79 by volume 4
Color
Green 5
Solids content by volume
79-81,5% 6
Dosage (theoretically)
0,33 kg/m2 at 150 micrometers thickness 7
Time of setting oC
8 hours @ oC
4 hours @ oC 8
Drying interval between layers
20-30 minutes 9
Time of living
Not less than 2 +25oC
Not less than oC 10
Solvent
Toluene/acetone mix (50-50 ratio) or acetone 11
Application method
Manually –by brush or roller
Mechanically – by using vacuum sputtering device 12
Application conditions
Air temperature from +5oC to +50oC, humidity not above 95%
For vacuum spaying devices – nozzles Graco # 621, 623, 625, pressure Bar 13
Packaging
Component A is packed in blue steel pails (grey or dark-blue colors are also allowed) with capacity of liters
Component B is packed in orange steel pails (foxy color is also allowed) with capacity of liters.

9. PROPERTIES OF PRIMER MB COATING#
Parameter
Norm 1
Component A (base) appearance
Viscous green liquid, solids-free 2
Content of volatile substances, % by mass
18,5-21,0 3
Component B (hardener) appearance
Low viscous light yellow to foxy liquid, solids-free 4
Content of solids residues, % by mass
27,5-28,6 5
Primer’s film appearance
After drying primer should form homogeneous green film free from impurities, pores and pocks 6
Primer’s pot life time, 25+2oC
not less 120 7
Drying time to rate 3, 25+2oC
not more than 60 8
Apparent 25+2oC, by VZ 3 5 minutes after mixing, sec.
not more than 23-32 9
Adhesion tested by grill cuts method, points
not more than 1 10
Adherence tested by grill cuts method after water exposure for 24 90oC, points 11
Water absorbing, % after exposure in water for 24 90oC
In case of treating external (overhead) metal surfaces they can be painted over the protective coating of “Primer MB”. It is made for different reasons:
prolonged lifetime of “Primer MB” coating layer in case of direct influence of environmental factors such as direct sunlight, moisture, wind, frost etc. Almost all types of paint and enamels can be used as an outer layer.
Primer “Primer MB” provides guaranteed anti-corrosion protection of a metal structure. Taking into consideration enhanced adhesion of the primer to a metal surface outer layer of paint is used only for decoration purposes. Using epoxy primer eliminates deep sand abrasion treatment of protected surface while changing outer paint layer (metal surface remains protected) and also increases adhesion of a paint to the metal surface. It cuts down the costs of next cosmetic and corrective maintenance works.

10. COLD WELDING MATERIALS
Cold welding” method is adhesive joining of metals by metal-filled composite materials.
Scope of application
Elimination of defects with up to 60 % pipe wall depth at pipeline up to 1220 mm diameter (including 1220 mm dia.) and up to 50 % pipe wall depth at 1420 mm dia. pipeline
Defects & dents (mechanical or corrosive) of outer surface of a pipe with sizes not exceeding 5 % of a pipeline diameter.
Defects of circumferential weld of pipelines (lack of penetration, edges displacement, scoria inclusions, pores etc ,
“Cold welding” technology can be used to repair and reconstruction of metal structures, pipes, valving, reservoirs at all industries.
BIURS group of companies manufactures three types of cold welding materials
REM-Steel – two-component stainless steel filled composite epoxy –based material
REM-Aluminum - two-component aluminum filled composite epoxy-based material
PGR-4 - two-component composite epoxy –based material
As per experiences of repairing pipelines in Russia, a pipeline repair costs is time lower than using electric welding. Cost of repair of valving is 20 times lower, of reservoirs – 25 times lower.

11. COLD WELDING MATERIALS PROPERTIES
PARAMETER
REM-Steel
REM Aluminum
PGR-4
Appearance after mixing
Grey Homogenous paste
Grey Homogenous paste
Black high viscous liquid
Pot life at +10°С to +35°С, from moment of starting mixing components А & B, min., not less: 45
120
Curing time at 20°С
At least 24 hours
At least 24 hours
Hardness (Shore) after 24 h from the beginning of setting at +10°С to °С, standard units, not less 98 94 90
Tensile strength, MPA, not less 22 15 39
Adhesion to steel surface MPA, not less 21
Bending strength, MPA, not less 40 30 81
Density, g/cm3
2,4-2,5
1,6-1,7
1,12-1,16
Dielectric strength at the breakdown at AC, kV/mm, not less:
1,5
1,1
2,1

12. CONTACTS Office in Russia Head Office Ajman Free Zone Ajman
United Arab Emirates
SM-Office B1-613 C
Office in Russia
Address : ul.Reshetnikova, 17 korp.4A
Saint-Petersburg,
Russia
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