Pressure Testing In New Orleans, Slidell, Metairie

Pressure Testing In Metairie, Kenner, Harahan, Marrero, Harvey, Gretna, River Ridge, Jefferson, New Orleans, Algiers, Covington, Mandeville, Slidell, Madisonville, Lacomb, LA

Pressure Testing and Gas Piping

Gas piping in homes can last many years. Most gas piping systems are constructed of rigid black iron or galvanized steel tubing. Becoming more popular today is flexible gas systems known as CSST (corrugated stainless-steel tubing). In modern times, underground gas piping is usually PE (polyethylene). Black iron is used more in attics, in or under homes and out of the weather. Some use black iron outside, but it must be coated to prevent rusting of the pipe. Whenever the gas piping is at risk of being exposed to the elements, usually a galvanized steel is used.

Galvanized steel piping can be used anywhere above ground and will give years of solid use. CSST tubing is a more modern product. Its appeal is a real labor saver without sacrificing performance. CSST can be installed without having an expensive threading machine. It can be run throughout homes without having any hidden pipe joints in inaccessible locations. It is ideal for high pressure systems. CSST must be properly installed and protected. It is a flexible material and can be easily punctured with nails/ screws, or damaged in attics by heavy boxes and equipment.

In situations where abuse may be a concern, it is recommended to go with a rigid material. Underground gas lines for homes and utility mains are being changed out with a yellow plastic material known as PE. Special tracer wire and tape are buried with the pipe for future utility location. The piping is usually terminated with special pipe risers that are rigid for proper protection exiting the ground. Underground PE piping is superior if installed correctly versus traditional metal materials. Galvanized steel has been used in underground gas lines, but it does not last many years due to corrosive elements in the soil.

Over time metal piping will start to corrode. When that happens, piping may start to leak or clog internally. Gas piping systems can be pressure tested to determine if a leak is occurring. Piping can be isolated with valves and leak searches can be performed. Electronic leak detection can be done but is usually not accurate in pinpointing exactly where a problem is, just a general area. The tried and proven method is with a bubbling gas leak solution.

Some use a general concentrated dish soap, but caution must be taken as some soaps are corrosive to the gas piping. Sometimes gas appliances may be getting the proper pressure of gas they need, but not the volume. This is commonly misunderstood. Many gas appliances may have a certain gas line inlet built in, but this is not the size gas line they need to carry common low-pressure systems. The farther a gas appliance is from your gas meter, the larger a gas line must be run. Low pressure gas may only operate of a quarter to a half a pound of pressure.

The pressure can drop greatly over distances or vertical climbs. Another example is many appliances have the same size gas inlet, but greatly varying amounts of gas they use. An example can be a kitchen gas range versus a gas tankless water heater. A tankless water heater may need over 3 times the volume of gas a simple kitchen range may need. This will result in large gas pipe size ranges. A simple test for gas volume can be done to determine proper pipe sizing and make sure there are no inline obstructions. Gas valves and regulators can fail to work correctly or clog. A manometer would then check volume and adjustments can be made.

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