管件、阀门、法兰行业动态与采购指南，助力 B2B 买家快速选型。
Overview of Chinese flange types commonly exported: weld neck, slip-on, blind, socket weld, and lap joint—with selection guidance for pressure, maintenance access, and piping service conditions.
Weld neck vs slip-on Chinese flanges compared for export buyers: hub design, weld requirements, pressure suitability, cost, and piping-class guidance for process and utility lines.
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