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Welding Services for Equipment used in the Petroleum and Natural Gas Industry. Original standard API St 20G-2020 in PDF full version. Additional info + preview on request

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Welding Services for Equipment used in the Petroleum and Natural Gas Industry. Original standard API St 20G-2020 (2025) in PDF full version. Additional info + preview on request

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Heat Treatment Services—Batch Type for Equipment Used in the Petroleum and Natural Gas Industry. Original standard API St 20H-2015 in PDF full version. Additional info + preview on request

Document status: Replaced by St API St 20H-2020 (2025)

Heat Treatment Services - Batch Type for Equipment Used in the Petroleum and Natural Gas Industry. Original standard API St 20H-2020 in PDF full version. Additional info + preview on request

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Heat Treatment Services—Batch Type for Equipment Used in the Petroleum and Natural Gas Industry. Original standard API St 20H-2020 (2025) in PDF full version. Additional info + preview on request

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Qualification of Distributors of Metallic Materials for Use in the Petroleum and Natura. Original standard API St 20J-2017 in PDF full version. Additional info + preview on request

Document status: Replaced by St API St 20J-2022