Pyrex Glass – What is it in Vaping?

Definition

Pyrex Glass is a borosilicate glass specifically engineered for vaping tanks, pods and drip tips. Renowned for its thermal-shock resistance, it withstands sudden temperature jumps from room-temperature Glycerin)”>VG (Vegetable Glycerin) liquids to the 200 °C+ coils inside Power Mode devices without cracking. Unlike cheap soda-lime glass, Pyrex is chemically inert, so aggressive citrus, menthol or cinnamon flavours won’t cloud or etch the surface, preserving flavour purity and extending the life of your atomiser. For Australian vapers, it’s the transparent window that lets you monitor e-liquid levels while surviving knocks in a ute tray or a day at the beach.

Technical Details

Pyrex Glass used in vape hardware is technically a low-expansion borosilicate (≈80 % silica, 13 % boron trioxide, 4 % sodium oxide, 2 % alumina). Its linear thermal expansion coefficient is 3.3 × 10⁻⁶ K⁻¹—about one-third that of standard glass—allowing it to tolerate temperature differentials up to 160 °C. Most sub-ohm tanks ship with 2 ml, 5 ml or 7 ml straight or bulb tubes wall-thickness 1.2–1.8 mm, Diameter“>inner diameter 16–25 mm. Variations include coloured Pyrex (light-smoked, ultem-tinted) and reinforced “bubble” glass that increases capacity without height. Manufacturers also offer replacement tubes with graduated millilitre markings for TPD-compliant Pod System adapters.

Usage & Tips

• Installation: Lightly wet the top and bottom O-rings with e-liquid before sliding the tube into the base—prevents pinching and micro-cracks.
• Cleaning: Rinse under warm (not boiling) water, then air-dry. For stubborn Glycol)”>PG (Propylene Glycol) residue, use isopropyl alcohol 70 %, rinse again.
• Common failure: Hairline cracks appear if overtightened on a crooked coildeck; inspect every re-wick and replace at first sign of leakage.
• Safety: Never “dry burn” coils while the glass is attached—rapid localised heat can shatter even Pyrex. Remove the tanksection or fill with liquid first.

History & Context

Originally trademarked by Corning Inc. in 1915 for laboratory beakers, borosilicate glass entered the vape scene in 2010 when early Genesis atomisers needed non-corrosive, heat-proof reservoirs. China’s Shenzhen factories began mass-producing affordable “vape-grade” Pyrex tubes in 2013, replacing plastic clearomisers that cracked with citrus or menthol juices. Today, replacement Pyrex is a staple in every Aussie vape shop, ensuring glass-compatible tanks outlast the Puff Count of built-in plastic pods.