Patent for the method of production of the pipe with cable-duct and continouos concrete coating and pipe with cable-duct (variants)

Patent for assembly for concreted pipelines joints protection

Patent for equalizing strain assembly and concrete coated pipelines joints protection form tension and impacts

Canadian Patent for pipelines protective coatings

EA for the method of protective coating production

EA for ballasting material

Method of concreted pipe with cable duct production

Patent for drive pipe

Patent for thermal insulated pipe

Patent for joint unit of pipes with ballasting coating

Patent for ballasting material with overdensity for submerged main pipelines

Patent for ballasting pipe production method

Patent for the method of application of ballasting material onto pipe for submerged pipeline

Patent for the method а sulphate-resistant weighted pipe production

Patent for pipe wih ballasting coating

Patent for pipe wih ballasting coating

Patent for pipe wih ballasting coating

Patent for pipe wih ballasting coating

Patent for pipe wih ballasting coating

Patent for pipe wih ballasting coating

Patent for pipe wih ballasting coating

Patent for pipe wih concrete coating and pipe producing methods

Patent for pipe wih ballasting coating

Patent for pipe wih ballasting coating

Patent for pipe with ballasting coating

Патент на узел стыка труб с балластным покрытием

The patent for pipeline anticorrosive protector