Gas piping systems carry gas and heated water. The piping system includes shut-off valves and flexible connectors to reach appliances far away. Flexible connectors provide an extra layer of safety against potential gas leaks during earthquakes. Gas piping systems must be properly designed and constructed to ensure safety and prevent cracks from forming. Local Law 152 helps you choose the right materials for pipes and strong structural support for safety. Safety is also determined by the quality of gas that is used in the system.
A gas piping system must withstand a pressure test of three PSIG or six inches of mercury. This pressure must be measured using a mercury manometer or slope gauge or an equivalent device. The test should be performed in 0.1-PSIG increments. Newly installed branches must be tested based on these standards. Once installed, a gas piping system must be tested to ensure it meets the minimum safety standards. The following steps are helpful in choosing the right gas piping system for a building.
After completing a Gas Piping System Periodic Inspection Certification, the building owner must submit it to the Department of Buildings (DOB) for approval. The LMP must sign the form and certify any conditions noted in the GPS1 report that is necessary for the building to be compliant with Construction Codes. Failure to submit this form will result in a civil penalty of $5,000. You should consider hiring a gas piping inspection company when planning to build a new building or renovate an existing building.
Before completing your Gas Piping System Periodic Inspection, you must hire a qualified Licensed Master Plumber (LMP). The LMP must sign and confirm the form on behalf of the owner. The inspection must be done every four years or by the end of the applicable inspection date range. Licensed master plumbers must complete these inspections. For building owners with no gas piping, the process will be much simpler. The inspection is usually completed by a licensed LMP and is not too expensive.
Periodic inspections are required every four years. Gas piping inspections must be performed by a Licensed Master Plumber or by a “direct and continuing” licensed plumber. If you hire a Licensed Master Plumber to inspect your Gas Piping System, the DOB encourages you to check their license status and disciplinary history. If they have a criminal record, you should not use them to conduct your Gas Piping System inspection.
Installing a CSST requires some extra work. It is installed by a qualified professional and should be bonded to electrical service. CSST is not suitable for use in a high-rise building. Therefore, it is important to hire a licensed professional to ensure your safety. You should install the system according to the manufacturer’s design guide and local codes. The flexible connectors must be installed at a minimum of six inches from the grade.
Natural gas has a specific gravity of 0.60, and you can calculate your desired pressure drop by dividing the connected load in BTUs by 2,500 or 3,200. A similar calculation applies to butane systems, where you must multiply the BTU by the length of the piping system. The inside pipe diameter is then figured using the desired pressure drop and the gas pressure. Finally, you should choose the right pipe size according to the specifications set forth by the gas utility.
A pulsation study is another important consideration when planning a process gas piping system. Pulsation studies can prevent the piping from bursting due to stresses. This failure can lead to process gas release. Higher power reciprocating compressors pose a challenge when it comes to designing skid stiffness. Proper skid stiffness will help maintain alignment even during transport. However, alignment will always be a part of commissioning, and will likely require a little adjustment.