Discussion Overview
The discussion centers on the safety and feasibility of using PVC piping to transfer a flammable gas at minimal gauge pressure (3 mbar) between two rooms. Participants explore concerns regarding static electricity buildup, grounding methods, and the overall safety of the proposed application.
Discussion Character
- Debate/contested
- Technical explanation
- Exploratory
Main Points Raised
- One participant expresses concern about static electricity buildup in PVC piping used for transferring flammable gas and seeks advice on grounding methods.
- Another participant states that PVC is an insulator and cannot be grounded, suggesting that grounding is only applicable to conducting materials.
- A suggestion is made to wrap a grounded wire around the PVC or use anti-static PVC pipe to mitigate static charge buildup.
- One participant argues that the gas cannot be both flammable and explosive at 3 mbar, emphasizing the need for proper safety measures and the use of metallic pipes and specialized pumps for such applications.
- Another participant proposes packing the PVC tube with copper wool to ground it and prevent flame propagation.
- A counterpoint is raised against using copper wool, referencing a safety concern about flame propagation and suggesting that the original poster should consult professionals for safe handling of flammable gases.
- One participant defends the use of copper wool as effective for grounding and flame screening, criticizing the suggestion to consult tradesmen for expertise on static electricity at low pressures.
- A clarification is made regarding the gauge pressure, indicating that 3 mbar gauge pressure translates to a total pressure that could potentially be above the flammability curve, leading to discussions about applicable safety standards.
- A link to an informational article is provided, discussing methods to render gases non-flammable before pumping.
Areas of Agreement / Disagreement
Participants express multiple competing views regarding the safety of using PVC for flammable gas transfer, grounding methods, and the implications of the gas pressure. The discussion remains unresolved with no consensus on the best approach.
Contextual Notes
Participants highlight various assumptions about the nature of the gas, grounding techniques, and safety practices, which may depend on specific definitions and standards. The discussion reflects differing levels of expertise and experience among participants.