switch language
 
mainabout uslicensescontactsquestions
search:
General Trading / Modified Anti Corrosion coatings

Modified Anti Corrosion coatings


 SYSTEM OF ANTI-CORROSION 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 OAO "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 # P51164-98 "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 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 9.402 or not less than St 3 according to ISO 8501-1 with roughness of surface Rz 30-100 micrometers

•-          at factory (base) conditions - 1 according to GOST 9.402 or not less than St 2 according to ISO 8501-1 with roughness of surface Rz 60-150 micrometers

A pipeline surface should be degreased and dedusted prior putting SAC "BIURS".

 

Primer "Primer MB" is a two-component system based on epoxy resin. The components of it are a ground and a 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 applying 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.

 

"Primer MB" can be used as standalone coating for protection 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 sparying method with separate components input. 

The thickness of mastic's layer varies is set by GOST 51164-98 as 2-2.5 millimeters. 

 

Detailed technology of application SAC "BIURS" can be found in the Application instruction. (click here). 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 144-192 hours (6-8 days).

Lifetime of the coating is at least 20 years (in case all technical requirements are observed)

PROPERTIES OF SAC "BIURS"

#

Parameter

Magnitude

Measuring method

1

Recommended operational temperature range

From -40oC to +60oC

-

2

Adherence to steel at +20+5oC using normal detaching, MPa

Not less than 7

GOST 14760

3

Adherence to steel at +20+5oC using normal detaching, MPa  after exposure in water for 1000 hours at different water temperatures:

20+5oC

40+5oC

60+5oC

80+5oC

Not less than

 

7

7

5

4

GOST 14760

4

Resistance to cathode peeling (raduis increase,mm or square of peeling, cm2)

@20+5oC

@40+5oC

@60+5oC

@80+5oC

 

 

6

6

9

10

GOST P 51164 (Appendix B)

5

Intermediate electric resistance of coating, Om-m2

1x1010

GOST P 51164 (Appendix G)

6

Intermediate electric resistance change, Om-m2 after exposure into 3% NaCl brine

@20+5oC

@40+5oC

@60+5oC

@80+5oC

 

 

 

No changes

GOST P 51164 (Appendix G)

7

Resistance to penetration (extrusion), mm

0,3

GOST P 51164 (Appendix E)

8

Tensile strength of peeled coating film  @25+5oC, MPa

12

GOST P 11262

(Appendix B. paragraph 1)

9

Tensile strain of peeled coating film while breaking @20+5oC, %

Not less than 65

GOST P 11262

(Appendix B. paragraph 1)

10

Tensile strain of peeled coating film while breaking @20+5oC, % 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)

11

Water absorbing, % of peeled coating film after exposure in water for 1000 hours at different water temperatures:

20+5oC

40+5oC

60+5oC

80+5oC

Not more than 5

GOST P 4650

12

Coating resistance to impacts within temperature range 40oC to 60 oC, J/mm

Not less than 50

GOST P 51164 (Appendix A)

All "BIURS" materials are provided with technical support. If any questions related to choosing of equipment, technology and application methods as well as running of the coatings produced by company "BIURS" please do not hesitate to contact to our technicians.

Packaging. 

The components of SAC "BIURS" are supplied as complete set which consists of:

- ground of "BIUR" mastix                                      90 kg

- hardener of "BIUR" mastix                                    75 kg

- ground 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). Gross weight of the set is 182 kg.

PRIMER MB as standalone 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 standalone 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 first (ground) 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. Set 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 pipeline 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  such as "Graco StMax 395", "Graco KA 390", "Graco Merkur" etc at temperatures from +5oC to +50oC.

Preparation of a pipeline surface means removing rust residues by using sand-blasting or grit-blasting methods and making surface rough to certain extent. 

TECHNICAL PROPERTIES 

1

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

12 hours @ +5   - +15oC

8 hours   @ +15 - +30oC

4 hours   @ +30 - +50oC

8

Drying interval between layers

20-30 minutes

9

Time of living

Not less than 2 hours @ +25oC

Not less than 30 minutes @ +50oC

10

Diluter

Toluol/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 sputtering device - nozzles Graco # 621, 623, 625, pressure- 23-20 Bar

13

Packaging

Component A is packed in blue steel drums (grey or dark-blue colors are also allowed) with capacity of 20-50 liters or steel flasks with capacity not more than 50 liters

Component B is packed in orange steel drums (foxy color is also allowed) with capacity of 10-20 liters or steel flasks with capacity not more than 30 liters.

By the clients permission packaging could be different but should have leakproof lids.

Technical requirements.

The primer should meet requirements of standard "Epoxy primer "Primer NB" (quick-setting) according to TU 2225-015-00396558-01. The primer should be prepared and applied inline with Application instruction of asphalt-urethane anticorrosion coating "BIURS".

 

            All materials used in making primer should meet corresponding standards and have all appropriate quality certificates.

            Quality parameters of components A and B as well as primer should meet the requirements shown in table 3.

 

#

Parameter

Norm

Testing method

1

Component A (ground) appearance

Viscous green liquid, solids-free

According to par. 4.2.*

2

Content of volatile substances, % by mass

18,5-21,0

According to par. 4.3.*

3

Component B (hardener) appearance

Low viscous light yellow to foxy liquid, solids-free

According to par. 4.2.*

4

Content of solids residues, % by mass

27,5-28,6

According to par. 4.2.*

5

Primer's film appearance

After drying primer should form homogeneous green film free from impurities, pores and pocks

According to par. 4.9.*

6

Primer's living time, minutes @ 25+2oC

not less 120

According to par. 4.7.*

7

Drying time to rate 3, minutes @ 25+2oC

not more than 60

According to par. 4.8.*

8

Apparent viscosity @ 25+2oC, by VZ 3 5 minutes after mixing, sec.

not more than 23-32

According to par. 4.6*

9

Adherence tested by grill cuts method, points

not more than 1

GOST 15140, par. 2 and par. 4.5

10

Adherence tested by grill cuts method after water exposure for 24 hours @ 90oC,  points

not more than 1

GOST 15140, par. 2 and par. 4.5, 4.10

11

Water absorbing, % after exposure in water for 24 hours @ 90oC 

5

GOST 21513, par. 1 and par. 4.5, 4.11

The coating has big positive experience of application. Last example - transfer pump station at Agalatovo Leningrad region (started running in Fall 2006)

At this station the works for external insulation of shedding lines of depressurization system and breathers unit were performed. After putting anti-corrosion coating - a layer of "Primer MB" all objects were painted by enamels in accordance with the project.

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 adherence 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 adherence of a paint to the metal surface. It cuts back the costs of next cosmetic and corrective maintenance works.

•-          Painting of different objects (e.g. reservoirs, pipelines, fittings etc) usually is done inline with design-driven document or requirements to the color schemes for such objects as well as with a company's color style. Making protective coating with certain colors brings about difficulties in manufacturing of it and increases the price of coating. At the same time   primer "Primer MB" can be covered by any type of paint and enamels.




Office in Russia
Group of companies BIURS
Street Reshetnikova
House 17, Korpus 4A
Saint Petersburg (196105)
Russian federation

Office in UAE
Group of companies BIURS
WCS General Trading FZC
P.O.BOX 487446
Dubai, UAE
 

Любое полное или частичное воспроизведение материалов сайта возможно только при наличии активной гиперссылки на источник: www.wcsenergy.ru

Все права защищены © 2009 WCS

создано в студии: