Overview
ISO 10428:1993 - "Petroleum and natural gas industries - Sucker rods (pony rods, polished rods, couplings and sub-couplings) - Specification" adopts API Specification 11B (24th Edition, 1990) with specific modifications for international use. The standard sets requirements for dimensional characteristics, chemical and mechanical properties, and gauging practice for sucker rods and associated components used in petroleum and natural gas well pumping systems. Certain API-specific provisions (for example, the API monogram appendix) are not part of the ISO standard; several test and sampling references are aligned to ISO practice.
Key topics and technical requirements
- Scope and content: Covers one-piece and three-piece sucker rods, pony rods, polished rods, couplings and sub-couplings, polished-rod liners, stuffing boxes and pumping tees, marking, packaging and inspection procedures.
- Materials and grades: Defines chemical and mechanical property requirements for common rod grades (examples given in the source: Grade K, C and D), including specified tensile strength ranges (e.g., Grade K ~85 000–115 000 psi; Grade C ~90 000–115 000 psi; Grade D ~115 000–140 000 psi) and references to AISI grade families.
- Dimensions and threads: Sizes, lengths and end styles are specified (see Table 3.1 in the standard). Pin/box connections and coupling classes are addressed in separate sections.
- Gauging practice and gauges: Detailed gage specification and gaging practice are provided. The document adopts ISO sampling/inspection references (replacement of MIL‑STD‑105D by ISO 2859‑1) for acceptance inspection.
- Unit conversions and internationalization: Conversion of English units follows ISO conventions (e.g., 1 in = 25.4 mm; 1 ft = 304.8 mm; 1 ft·lbf = 1.355818 N·m).
- Limitations: The gauge certification system specified is not considered an integral part of the ISO standard and is subject to further study for a possible ISO certification scheme. Appendix A (API monogram) and some policy items apply only to the API publication.
Applications and users
ISO 10428 is intended for:
- Manufacturers of sucker rods, couplings and polished rods who need standardized material, dimensional and threading requirements.
- Procurement and quality engineers in the petroleum and natural gas industries specifying rod materials and acceptance criteria.
- Inspection and testing laboratories performing tensile, chemical and gaging verification.
- Standards committees and certification bodies aligning API Spec 11B content with international ISO practice.
Related standards
- API Specification 11B (Spec 11B), 24th Edition - base document adopted by ISO 10428
- ISO 2859‑1 - sampling procedures referenced in place of MIL‑STD‑105D
- ISO 31 - unit conversion conventions
Keywords: ISO 10428, sucker rods, API Spec 11B, sucker rod couplings, gauging practice, polished rods, petroleum and natural gas industries, rod material grades.
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