HM Tanks Blog — Pressure Tank Guides, Certification Tips & Manufacturing Insights https://www.huimay.cn/en/blog/ Technical guides and manufacturing insights for pressure vessel importers and distributors. Expansion tank sizing, certification requirements, factory processes, and OEM/ODM expertise from HM Tanks — Shanghai-based pressure tank manufacturer since 2019. en Thu, 10 Jul 2026 00:00:00 +0800 How to Size an Expansion Tank for Hydronic Heating Systems https://www.huimay.cn/en/blog/expansion-tank-sizing-guide.html https://www.huimay.cn/en/blog/expansion-tank-sizing-guide.html Thu, 10 Jul 2026 00:00:00 +0800 Step-by-step engineering guide to calculating the correct expansion tank size for closed-loop hydronic systems. Covers acceptance volume, system volume estimation, fill pressure, and relief valve settings — with worked examples for residential and commercial installations. info@huimay.cn (HM Tanks Engineering Team) Technical Guide ASME Certification for Pressure Vessels: What Importers Need to Know https://www.huimay.cn/en/blog/asme-certification-guide.html https://www.huimay.cn/en/blog/asme-certification-guide.html Thu, 17 Jul 2026 00:00:00 +0800 Comprehensive guide to ASME BPVC certification for international buyers sourcing pressure vessels from China. Covers Section VIII Division 1, U-Stamp vs UM-Stamp, documentation for customs, and supplier verification. info@huimay.cn (HM Tanks Quality Team) Certification RO Tank Selection Guide: Plastic vs Steel vs Plasteel https://www.huimay.cn/en/blog/ro-tank-selection-guide.html https://www.huimay.cn/en/blog/ro-tank-selection-guide.html Thu, 24 Jul 2026 00:00:00 +0800 Detailed comparison of plastic, steel, and plasteel RO storage tanks. Material properties, FDA compliance, pressure ratings, diaphragm technology, cost analysis, and application-specific recommendations. info@huimay.cn (HM Tanks Product Team) Buyer's Guide Inside a Modern Pressure Tank Factory: HM Tanks Production Tour https://www.huimay.cn/en/blog/pressure-tank-factory-tour.html https://www.huimay.cn/en/blog/pressure-tank-factory-tour.html Thu, 31 Jul 2026 00:00:00 +0800 Behind-the-scenes factory tour covering the 7-stage production process: material inspection, stamping & forming, welding, surface treatment, assembly, pressure testing, and final QC at our 40,000 sqm Linyi facility. info@huimay.cn (HM Tanks Engineering Team) Factory Tour