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This part of ISO 15136 provides requirements for the design, design verification and validation, manufacturing and data control, performance ratings and repair of progressingcavity pump surface-drive systems for use in the petroleum and natural gas industry. This part of ISO 15136 is applicable to those products meeting the definition of surface-drive systems. Additionally, informative annexes provide information on brake systemselection, installation, and operation; and sucker rod selection and use. Equipment not covered by this part of ISO 15136, unless integral by design, includes bottom drive systems, sucker rods, polished rod clamps, stuffing boxes, electrical controls, instrumentation, external power transmission devices, auxiliary equipment, such as belts, sheaves and equipment guards. These items might or might not be covered by other International Standards.