ISO/PAS 24565:2022 - Ceramic lined tubing (CLT)
Overview
ISO/PAS 24565:2022 specifies requirements for ceramic lined tubing (CLT) used in the petroleum and natural gas industries. It covers configuration and materials, manufacturing, inspection and testing, marking, packaging, transportation, and storage. The specification applies to CLT produced by centrifugal self‑propagating high‑temperature synthesis with outside diameters from 42.16 mm (1.66 in) to 114.3 mm (4‑1/2 in) and backing steel grades H40, J55, and N80 type 1. CLT is intended for extracting multiphase fluids (hydrocarbon gas, hydrocarbon liquid, water) in corrosive, abrasive, wax‑deposition, scaling and high‑temperature environments.
Key topics and technical requirements
- Configuration and materials: requirements for backing pipe, thermite filler, end caps and CB rings, and allowable connection types.
- Manufacturing controls: procedures for treatment of backing pipe (blast‑cleaning, straightening), thermite mixing, filling, lining, heat treatment, end cap installation and threading.
- Traceability and documentation: lot identification, purchaser/manufacturer documentation and records.
- Inspection and testing:
- Ceramic liner surface quality, thickness, hardness and density checks (see Annexes for test methods).
- CLT dimensional checks: length, straightness, thread/end cap inspection, drift, hydrostatic and corrosion tests.
- Mechanical tests: tensile, impact, connection testing.
- Additional tests where required: impact resistance, crushing strength, bonding strength, bending and thermal shock.
- CB ring and end cap specific testing and acceptance criteria, with prescribed inspection frequency and lot sampling.
- Marking, packaging, transport and storage: labeling, protective packaging, handling and storage to preserve ceramic liner integrity.
- Applicability note: extension to other sizes or higher steel grades is possible by agreement between purchaser and manufacturer.
Applications and users
- Practical uses: downhole tubing in oil and gas wells exposed to corrosion, abrasion, scaling, wax deposition and high temperatures, and for production with multiphase flow.
- Primary users: tubing manufacturers, oil & gas operators, procurement and quality assurance engineers, inspection and testing laboratories, and suppliers of downhole completion components.
Related standards
- Prepared by ISO/TC 67 (Materials, equipment and offshore structures for petroleum, petrochemical and natural gas industries). Users should consider complementary ISO/TC 67 standards for casing, tubing and drill pipe and applicable industry guidance when implementing CLT solutions.
Keywords: ISO/PAS 24565:2022, ceramic lined tubing, CLT, petroleum and natural gas, centrifugal self‑propagating high‑temperature synthesis, inspection and testing, corrosion resistance, abrasive wear, tubing manufacturing.