Import Astmb68 Jish3300 Inner Grooved Copper Tube — Buy in wholesale FOB from Supplier in China

The ASTMB68 JISH3300 Inner Grooved Copper Tube from Segment Industrial Development Co., Ltd. combines ASTM B68 seamless copper tube construction with precision internal helical or cross-groove geometry conforming to JIS H3300. The material is electrolytic copper of DHP grade with 99.90% minimum purity, selected for its thermal conductivity and formability during the grooving process. Internal grooves multiply the internal surface area and induce turbulent flow, which the supplier claims improves heat transfer efficiency by up to 25% compared with equivalent smooth-bore tubes in solar thermal collectors and compact heat exchangers.

JIS H3300 governs the chemical composition, mechanical properties, and dimensional tolerances for copper and copper alloy seamless tubes in Japan, while ASTM B68 addresses the American market requirements for condenser and heat exchanger service. The dual specification approach suggests the product targets export markets requiring either standard. The grooving process is typically performed on drawn tube using precision rolling or skiving equipment; groove depth, helix angle, and land width must be controlled to prevent stress concentrations that could initiate fatigue cracks under pulsating thermal loads. The listing does not specify groove geometry parameters, which buyers should request before finalising specifications.

Primary demand centres on solar thermal equipment manufacturers seeking enhanced collector efficiency, plus HVAC and refrigeration OEMs pursuing refrigerant-side heat transfer augmentation in evaporators and condensers. The renewable energy infrastructure angle positions this product for district heating networks and industrial process heat applications where compact heat exchanger size reduces installation footprint. Buyers should confirm whether the supplier offers multiple groove patterns optimised for liquid, gas, or two-phase flow applications, and whether the tubes are supplied in coil or straight lengths.

Segment Industrial Development Co., Ltd. is headquartered at No.59, Hongqi Road, Huashi, Jiangyin, Jiangsu Province, China 214400, a location within one of China's principal clusters for copper semi-fabrication and precision tubing manufacture. The company's Harbor trust tier indicates basic platform verification without extended due diligence disclosure. The recorded response rate of 0.00% and zero average response hours mean prospective buyers cannot rely on historical responsiveness data and must undertake their own communication trials.

This listing presents the supplier as capable of producing dual-standard copper tubing with advanced internal surface enhancement for renewable energy and HVAC markets. No information is provided about grooving equipment capacity, in-house testing capability for heat transfer verification, or specific solar OEM references. The company's profile does not disclose annual turnover, employee count, factory floor area, or certifications such as ISO 9001 or ISO 14001. Buyers evaluating this supplier for project-critical solar thermal installations should consider an on-site factory assessment or third-party audit before committing to volume supply agreements.