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 - 20^oC to +100^oC" 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 R_z 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 R_z 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 +5^oC to +50^oC.

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 +20^oC. 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"

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 +5^oC to +50^oC.

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 

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.

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.