NAKS Welding Procedure Attestation

Mandatory for organizations using welding during installation, reconstruction and repair of equipment and structures at hazardous production facilities. Attestation confirms the organization’s technical capability, welders’ qualifications and the quality of welded joints. Organizations without a valid NAKS certificate are not permitted to perform such work.

• Initial — when an organization starts using a particular procedure in production for the first time
• Periodic — mandatory once every 4 years, upon expiry of the NAKS attestation certificate
• Extraordinary — assigned in accordance with the requirements of authorized persons and authorities

To undergo welding procedure attestation, an organization must provide the following documents:

• Procedure documents: welding instructions, descriptions of welding procedures and welding procedure sheets
• Copies of the organization’s constitutional documents
• Completed application for attestation with all appendices
• Copies of NAKS certificates for all welders and welding production specialists
• Copy of the agreement with a nondestructive testing laboratory or a copy of the certificate confirming attestation of the laboratory performing quality control of welded joints
• Copies of attestation certificates and certificates for welding consumables
• Certificates or other documents for welding equipment

Development of documents tailored to each organization’s welding types and methods:

• Assembly and welding procedure instruction
• Welding procedure description
• Welding and assembly procedure sheets
• Required standards

The NAKS attestation level (I, II or III) and the hazardous technical-device group are determined by the types of welding work and the facilities where the work is performed.

The attestation level does not replace the trade qualification grade, which must be assigned before a welder begins the attestation procedure. Before specialist attestation, our expert centre may offer gas-electric welder or electric welder training courses.

Welders and welding production specialists undergoing attestation at Levels I to III must specify the required welding or surfacing method.

To select the appropriate attestation program, submit an application specifying the required welding methods and the facilities where the welding work will be performed.

Attestation of welding consumables is performed in accordance with the requirements of the National Welding Control Agency (NAKS) and applicable Rostechnadzor regulations. Its purpose is to confirm that the actual technological properties of the materials comply with the accompanying documentation and standards applicable to hazardous production facilities.

• Application for welding-consumable attestation submitted by the manufacturer, manufacturer’s representative or consumer
• Copy of the legal entity’s tax-registration certificate
• Extract from the Unified State Register of Legal Entities (EGRUL)
• Quality certificate for the welding consumables
• Technical specifications or material standard
• Material passport or instructions for use

List of hazardous production facility technical-device groups whose welding or surfacing is performed by attested welders using attested welding consumables, welding equipment and welding or surfacing procedures:

• Lifting cranes
• Pipe-laying cranes
• Loader cranes
• Lifts
• Hoists
• Winches
• Load-handling devices
• Aerial work platforms
• Escalators
• Ropeways, their units, mechanisms and components
• Chains for lifting and transport equipment
• Construction hoists
• Passenger conveyors
• Metal structures for lifting and transport equipment

• Steam boilers with steam pressure above 0.07 MPa and hot-water boilers with water temperature above 115°C
• Steam and hot-water pipelines with working pressure above 0.07 MPa and temperature above 115°C
• Pressure vessels operating above 0.07 MPa
• Valves and safety devices
• Metal structures for boiler equipment

• Pipelines of internal gas-supply systems
• External low-, medium- and high-pressure gas pipelines made of steel or non-metallic materials
• Gas equipment of boilers, process lines and units
• Gas burners
• Storage and instantaneous water heaters
• Apparatus and furnaces
• Metal valves and safety devices

• Field and trunk oil-product pipelines and pumping-station pipelines during construction, reconstruction and major repair
• Field and trunk oil-product pipelines and pumping-station pipelines during routine repair in operation
• Field and trunk gas and condensate pipelines; pipelines within gas treatment units, compressor stations, booster compressor stations, underground gas-storage facilities, gas-distribution stations, gas-pressure reduction and metering units and pressure-regulating stations
• Pipelines within gas treatment units, compressor stations, oil-pumping stations, underground gas-storage facilities, booster compressor stations, gas-distribution stations, gas-pressure reduction and metering units and pressure-regulating stations, excluding pipelines transporting gas, oil and petroleum products
• Oil and petroleum-product storage tanks and gas holders during construction and repair
• Offshore pipelines and shelf facilities during construction, reconstruction and repair
• Unique oil and gas industry facilities during construction and repair
• Shut-off valves during factory manufacture and repair
• Pipeline components during factory manufacture and repair
• Pumps, compressors and other equipment during factory manufacture and repair
• Oil and gas pipeline pipes during factory manufacture and repair
• Oilfield, gas-field, drilling and oil-refining equipment
• Pipelines of automated natural-gas vehicle filling compressor stations

• Blast-furnace, coke-making and steelmaking equipment
• Process equipment and pipelines for ferrous and non-ferrous metallurgy
• Technical devices for production of ferrous and non-ferrous metals and alloys
• Steel and non-ferrous metal casting machines
• Tube-rolling units
• Blooming, billet, section-rolling and sheet-rolling mills

• Equipment operating at pressure up to 16 MPa
• Equipment operating at pressure above 16 MPa
• Vacuum equipment
• Tanks for storage of explosive, fire-hazardous and toxic substances
• Isothermal storage facilities
• Cryogenic equipment
• Ammonia refrigeration equipment
• Furnaces
• Compressor and pumping equipment
• Centrifuges and separators
• Tankers, containers and cylinders for explosive, fire-hazardous and toxic substances
• Waste-heat boilers
• Energy-process boilers
• High-temperature organic heat-transfer-fluid boilers
• Pipeline valves and safety devices
• Process pipelines and pipeline components

• Technical devices for mining and mineral-processing facilities and underground sites

• Specialized containers and packaging for transporting dangerous goods and construction materials
• Tankers
• Running gear

• Metal building structures
• Reinforcement, reinforcing assemblies and embedded items for reinforced-concrete structures
• Metal pipelines
• Polymer structures and pipelines

• Metal structures of spans, supports and pylons of steel bridges during factory manufacture
• Metal structures of spans, supports and pylons of steel bridges during assembly, welding and repair under site conditions