Which type of pipe is specified for vertical guardrail support in CNG installations?

The specification for vertical guardrail support in compressed natural gas (CNG) installations requires the use of Schedule 40 steel pipe due to its strength, durability, and ability to withstand the physical stresses associated with vehicle impacts and environmental conditions. Schedule 40 steel pipe is known for its high tensile strength and rigidity, making it suitable for protective barriers in facilities where safety is paramount. It can effectively support the weight and stress of vertical guardrails, ensuring that they remain structurally sound and effective in their protective role.

Other types of materials, such as PVC, aluminum, or iron pipes, do not offer the same level of strength and impact resistance as Schedule 40 steel pipe. PVC, while lightweight and corrosion-resistant, lacks the structural integrity needed for guardrails that will face potential collisions. Although aluminum is also lightweight and resistant to corrosion, it generally does not provide the necessary rigidity and strength required for vertical supports in CNG installations. Iron pipes can also be strong, but they may be more prone to rust and deterioration over time compared to the appropriate grades of steel used for this application.