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Pipeline fittings. Iron castings. Technical requirements

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Pipeline fittings. Non-ferrous alloy castings. Technical requirements

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Pipeline fittings. Requirements to materials of fittings used for hydrogen sulfide-containing media

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Pipeline fittings. Deposit welding and quality control of deposited surfaces. Technical requirements

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Pipeline fittings. Structural materials for the parts of pipeline fittings operating in corrosion active mediums. Technical requirements

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Pipeline fittings. Valve trims with polytetrafluorethylene sealing and composition materials. Specifications and methods for fixation of sealing rings

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