Hitze Insights
Piping & Heating Technical Guides
Specification, certification and sourcing guides for wholesalers, contractors and private-label brands — written from the Hitze engineering desk.
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Latest technical guides
Cold Expansion (F1960) vs Crimp (F1807): PEX Connections Compared
F1960 cold expansion vs F1807 crimp for contractors: verified ASTM scopes, flow-path ID math, tool costs, cold-weather behavior and warranty risk.
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Inside PEX-AL-PEX: Why Butt-Welded Aluminium Layers Matter
Not all multilayer is equal: how a butt-welded aluminium core in PEX AL PEX pipe beats overlap welds on concentricity, oxygen barrier…
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PEX Chlorine Resistance: What F876 CL Ratings Mean
What PEX chlorine resistance really means: ASTM F876 CL1/CL3/CL5 classes, F2023 testing, PPI TR-4 and NSF-pw explained for spec engineers.
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Thermal Expansion in Plastic Pipe: PEX vs Multilayer vs PP-R
Grounded coefficients for pipe thermal expansion: PEX ~0.15-0.20, multilayer ~0.025, PP-R ~0.15 mm/(m·K). Worked 30 m riser at ΔT 40 K, loops…
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PPR Pipe Sizes, SDR & PN Ratings: 20mm to 110mm Spec Guide
PPR pipe size chart 20–110mm: SDR 11/7.4/6 walls per DIN 8077, PN ratings at 20°C vs hot derating, and how to match…
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PEX vs Copper for Potable Water: A Trade Buyer’s Comparison
PEX vs copper for potable water: installed cost, chlorine and freeze behavior, theft risk, code acceptance, recirc limits — a trade buyer's…
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EN ISO 15874 for PP-R Pipe: Classes of Service Explained
EN ISO 15874 application classes for PP-R explained: class 1, 2, 4, 5 temperatures, 4-10 bar design pressures, S-series walls and the…
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EU Drinking Water Directive 2020/2184: New Material Rules for Pipe
EU drinking water directive 2020/2184 replaces national schemes with European Positive Lists. Exact acts, the 2026 and 2032 dates, and what buyers…
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BS 6920 Water-Quality Testing: What It Involves & Why It Matters
BS 6920 explained for UK importers: the six water-quality tests, pass thresholds, hot vs cold, how it underpins WRAS, and the report…
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SKZ Certification: What Germany’s Plastics Institute Tests on Pipe
SKZ certification explained for pipe importers: what the Würzburg lab tests, 5-year certificates, semi-annual factory audits, and how to verify a claim.
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