• copy of invoice or contract
Obtaining permits as a mandatory procedure only for two types of pipes - used for the construction of gas pipelines and pressure systems. Upon receipt of a certificate for the remaining pipes, their purpose is taken into account. Certificates for pipes: documentation certifying product conformity to standards, requirements, according to GOST R, regulatory legal acts, documents, other documents not subject to mandatory state certification, can also be produced at the request of the manufacturer or distributor, that is, on a voluntary basis. The certificate for the pipe steel paper carrier, representing the permits approved by the sample. Conformity assessment is necessary so that the consumer is confident that the use of this product will not harm him and others.
The pipe certificate for potential consumers is indisputable proof of the exceptional quality of the product. Its receipt guarantees not only high quality products, but also affects the competitiveness of the company in the market.
By production and release of construction fittings the presence of the allowing document is obligatory. Certification of valves allows legally, legally accept, use during construction, sell, produce, put into circulation, operation type of these products. Upon receipt of permits for pipe fittings, special studies are carried out, tests determining the main parameters:
• impact strength, impermeability, throughput;
• resistance to internal stress, temperature extremes;
• Level of plating thickness, plasticity, scrolling ability, flexibility;
• aesthetic visual appearance, external surface quality of the product;
Receive a certificate of conformity for valves companies that care
