LPG Gas Pipe Sizing Calculator

Appliance	BTU Rating	Quantity	Total BTU	Pipe Length (ft)	Pipe Diameter (inches)	Allowable Pressure Drop (inWC)
Gas Range	40,000	1	40,000	20	1/2	0.5
Gas Furnace	80,000	1	80,000	30	3/4	0.5
Gas Water Heater	40,000	1	40,000	20	1/2	0.5
Total BTU Load			160,000

In this example:

• We have three common appliances: a gas range, a gas furnace, and a gas water heater.
• Each appliance's BTU rating is listed.
• The quantity of each appliance is also specified.
• The total BTU load is calculated by summing the individual appliance loads.
• We've assumed a certain pipe length for each appliance and a specific pipe diameter.
• The allowable pressure drop is an estimation of the acceptable pressure loss within the pipe.

Keep in mind that this is a simplified example. For an accurate gas pipe sizing calculation, you should consult a professional or use specialized software that considers more detailed factors, including gas type, elevation, and specific local codes and regulations.

FAQs

What is the size of LPG pipe? LPG pipe sizes can vary, but common sizes for residential use are typically around 1/2 inch to 1 inch in diameter.

How many BTU can a 3/4 gas line provide? A 3/4-inch gas line can provide approximately 150,000 to 200,000 BTUs per hour.

How do I calculate gas pipe size? The gas pipe size is calculated based on factors such as the total BTU load of all connected appliances, the length of the pipe run, and the allowable pressure drop. A gas pipe sizing calculator or a professional gas technician can help with this calculation.

Which pipe is best for LPG gas lines? For LPG gas lines, it's recommended to use pipes made of materials like copper, steel, or polyethylene (PE) that are suitable for gas service and comply with local regulations.

How long can an LPG gas pipe be? The length of an LPG gas pipe can vary depending on factors like the pipe size, the pressure, and the specific installation requirements. In residential settings, LPG gas pipes can typically range from a few feet to several tens of feet.

What is the difference between LPG and gas pipe? There is no fundamental difference between LPG (liquefied petroleum gas) pipes and natural gas pipes in terms of materials or construction. The main difference is the type of gas they carry. However, LPG pipes may need to be sized differently due to the higher energy content of LPG.

What size gas line do I need for 200,000 BTU? For a 200,000 BTU load, you would typically need a gas line with a diameter of around 3/4 inch.

What happens if the gas line is too small? If the gas line is too small for the appliances it serves, it can result in insufficient gas flow, reduced appliance performance, and potentially unsafe conditions. Appliances may not operate properly, and there can be a risk of gas leaks or damage to the equipment.

How many appliances can you run off a 3/4 gas line? The number of appliances that can be run off a 3/4-inch gas line depends on their individual BTU requirements and the total capacity of the gas line. Generally, a 3/4-inch line can supply multiple smaller appliances or a few larger ones, but it's essential to calculate the load accurately.

What is the formula for line sizing? The formula for gas line sizing involves various factors such as the total BTU load, pressure drop, pipe length, and specific gas characteristics. It's a complex calculation and often requires specialized software or consultation with a gas technician.

Can you go from a smaller gas pipe to larger? Yes, it is possible to transition from a smaller gas pipe to a larger one using appropriate fittings and adapters. This is often done to accommodate changes in gas load or to ensure adequate gas flow to appliances.

Is gas pipe measured by ID or OD? Gas pipe size is typically specified by its inside diameter (ID).

Can PEX be used for LPG? PEX (cross-linked polyethylene) is generally not recommended for LPG gas lines in many regions. Local codes and regulations vary, so it's essential to check with local authorities and follow their guidelines.

Can you use plastic pipe for LPG? Using plastic pipe for LPG gas lines is generally not recommended due to the flammability of LPG. It's safer to use materials like copper, steel, or approved plastic materials designed for gas service.

Can I use flexible pipe for a gas line? Flexible gas lines, such as corrugated stainless steel tubing (CSST), are commonly used for gas lines in residential applications. However, they must be properly installed and comply with local codes and regulations.

What are the rules for LPG pigtails? LPG pigtails, which connect the LPG cylinder to the regulator, must comply with local regulations and standards. They should be made of materials suitable for LPG service and regularly inspected for signs of wear or damage.

How often should LPG pigtails be replaced? LPG pigtails should be inspected regularly and replaced if they show signs of wear, damage, or deterioration. The frequency of replacement may vary based on usage and local regulations but is typically recommended every 5 to 10 years.

What is the maximum pressure of LPG gas? The maximum pressure of LPG gas in a typical residential or commercial propane tank is around 200 psi (pounds per square inch) at room temperature.

Why is LPG not allowed for gas cutting? LPG is generally not recommended for gas cutting because it does not provide the high flame temperatures required for efficient metal cutting. Other gases like acetylene are commonly used for this purpose.

Which type of hose pipe is used for the LPG pipe? For LPG applications, specially designed LPG hoses made of materials compatible with LPG service are used.

What are the three types of LPG? The three main types of LPG are propane, butane, and a mixture of both. The specific composition of LPG can vary based on its intended use and regional availability.

What size gas line do I need for a 400,000 BTU heater? For a 400,000 BTU heater, you would typically need a gas line with a diameter of around 1 inch or larger, depending on factors like the pipe length and pressure.

At what size must a gas line be welded? Gas lines may require welding for larger diameter pipes, typically above 2 inches in diameter. The exact size at which welding is required can vary based on local codes and regulations.

What size is 2 psi natural gas? Natural gas at 2 psi (pounds per square inch) is typically delivered through pipes with diameters ranging from 1/2 inch to 2 inches, depending on the specific application and gas load.

How many feet down is a gas line? Gas lines are typically buried at a depth of 18 to 24 inches underground to protect them from damage and ensure safety.

Should unused gas lines be capped? Unused gas lines should be properly capped or otherwise sealed to prevent gas leaks and ensure safety.

Can I use a 1/2-inch gas line for a dryer? A 1/2-inch gas line may be sufficient for a gas dryer, depending on the dryer's BTU rating and the length of the gas line. It's essential to check the manufacturer's specifications and consult local codes.

What is the most common gas line size? The most common gas line size for residential applications is 1/2 inch or 3/4 inch, depending on the gas load and local regulations.

Can you use Schedule 40 for a gas line? Schedule 40 PVC pipe is not suitable for use as a gas line because it is not designed for gas service and can pose safety risks.

Can you run a gas line next to electrical? Gas lines and electrical lines should be installed with adequate separation to meet local codes and safety standards. The specific requirements for separation may vary by jurisdiction.

How do I choose the right pipe size? Choosing the right pipe size involves considering factors such as the gas load, pressure, pipe length, and local regulations. Consult with a qualified gas technician or use a gas pipe sizing calculator for guidance.

What happens when you reduce pipe size? Reducing pipe size can lead to increased flow velocity and pressure drop, potentially affecting the performance of appliances and causing turbulence and noise in the gas line.

How do you set a line formula? Setting a line formula typically involves defining the mathematical relationship between variables in a specific context. The exact formula would depend on the problem or application at hand.

Is it OK to bend gas pipe? Gas pipes can be bent to a certain extent, but the bending should be done carefully to avoid kinking or damaging the pipe. Follow manufacturer recommendations and local codes when bending gas pipes.

What PSI is natural gas at home? Natural gas supplied to homes typically ranges from 3.5 to 7 inches of water column (inWC), which is equivalent to approximately 0.125 to 0.25 psi.

Is it OK to cut a gas pipe? Cutting a gas pipe should only be done by a qualified gas technician using appropriate tools and safety measures. Improper cutting can lead to gas leaks and safety hazards.

What does the proper size diameter of a gas supply pipe depend on? The proper size diameter of a gas supply pipe depends on factors such as the gas load (in BTUs), pressure requirements, pipe length, and local regulations.

Is pipe size inside or outside diameter? Pipe size is typically specified by its inside diameter (ID).

What is the outside diameter of gas pipe? The outside diameter of gas pipes can vary depending on the material and size. For example, a 1/2-inch copper gas pipe typically has an outside diameter of approximately 5/8 inch.

Why is black pipe used for gas lines? Black pipe, or black iron pipe, is often used for gas lines because it is strong and durable, resistant to corrosion, and suitable for high-pressure gas applications.

Can you use SharkBite on a gas line? SharkBite fittings are generally not recommended for use on gas lines. Gas lines typically require specialized fittings designed for gas service.

Can you use stainless steel pipe for LPG? Stainless steel pipes can be suitable for LPG gas lines if they are specifically designed and rated for gas service and comply with local regulations.

Which gas pipe is best for LPG gas lines? The best pipe material for LPG gas lines depends on local regulations and standards. Common options include copper, steel, and approved plastic materials.

How thick is an LPG gas pipe? The thickness of an LPG gas pipe can vary based on the material and diameter. For example, a typical 1/2-inch steel gas pipe may have a thickness of around 0.065 inches.

Does a propane gas line need to be grounded? Propane gas lines should be grounded in accordance with local electrical codes and standards to prevent the buildup of static electricity and reduce the risk of sparks.

What is the problem with CSST gas lines? Corrugated stainless steel tubing (CSST) gas lines have been associated with potential lightning-related issues, such as arcing and fires. Proper bonding and grounding are essential to mitigate these risks.

Which type of pipe cannot be used for gas? Materials like PVC, CPVC, and ABS are not suitable for use in gas lines because they are not designed for gas service and can pose safety risks.

How long do LPG pigtails last? The lifespan of LPG pigtails can vary depending on usage, environmental conditions, and the quality of the materials. They may need replacement every 5 to 10 years or as recommended by local regulations.

Do empty gas cylinders need to be chained? Empty gas cylinders should be securely stored and chained to prevent them from falling or being tampered with. This is a safety precaution commonly followed in many industries.

Can you store LPG on its side? LPG cylinders should generally be stored in an upright position to prevent liquid gas from escaping the tank. Consult local regulations for specific storage requirements.

What is the life of an LPG gas pipe? The life of an LPG gas pipe can vary depending on factors like the material, installation quality, and environmental conditions. Well-maintained gas pipes can last for several decades.

Does LPG deteriorate over time? LPG does not deteriorate over time when stored properly in sealed containers. However, the containers themselves can deteriorate or corrode, potentially leading to leaks.

Does LPG burn out valves? LPG can be corrosive to certain materials over time, which may affect valves and other components if they are not made of compatible materials. Proper valve selection is essential.

How many psi is LPG? The pressure of LPG can vary depending on temperature and specific blend, but it is typically stored at a pressure of about 100 to 200 psi in cylinders.

What is the maximum burst pressure required for LPG hoses? The maximum burst pressure for LPG hoses should exceed the maximum operating pressure, typically by a substantial margin to ensure safety. Common burst pressure ratings can be in the range of 500 to 1000 psi.

What is the major disadvantage of LPG? One major disadvantage of LPG is that it is heavier than air and can pool in low-lying areas, creating a potential fire or explosion hazard if not properly ventilated or controlled.

Is LPG a hazardous gas? LPG is considered a hazardous gas due to its flammability and potential for explosion if not handled and stored correctly. Safety precautions are essential when dealing with LPG.

What is the size of an LPG hose pipe? The size of an LPG hose pipe can vary, but common sizes include 1/4 inch, 3/8 inch, and 1/2 inch, depending on the application and flow requirements.

Is propane and LPG gas the same? Propane is a type of LPG (liquefied petroleum gas). While propane is a component of LPG, the term "LPG" can also refer to a mixture of propane and butane.

Is LPG more flammable than natural gas? LPG is generally more flammable than natural gas because it has a higher energy content and a lower ignition point. However, both gases are flammable and should be handled with caution.

How many BTUs can a 3/4 gas line supply with LPG? A 3/4-inch gas line can supply approximately 150,000 to 200,000 BTUs per hour with LPG.

What size gas line do I need for 200,000 BTU? For a 200,000 BTU load with LPG, you would typically need a gas line with a diameter of around 3/4 inch.

Can my gas line be too big? While it's important for a gas line to be appropriately sized, having a gas line that is too large can lead to reduced gas velocity, which may affect the performance of certain appliances. It's essential to follow proper sizing guidelines.

How far does gas pipe bonding need to be? The distance for gas pipe bonding typically depends on local electrical codes and standards. It may vary, but common requirements are within 6 feet of the gas meter or entrance point.

Can you run a tankless water heater on a 1/2 gas line? The suitability of a 1/2-inch gas line for a tankless water heater depends on the heater's BTU rating and the length of the gas line. Consult the manufacturer's specifications and local codes for guidance.

Is 2 psi medium pressure gas? Yes, 2 psi is considered medium pressure gas. It is commonly used in certain commercial and industrial applications.

How far can you run the line from the propane tank to the house? The distance you can run a propane line from the tank to the house depends on factors like the pipe diameter, pressure, and the total BTU load. Consult with a propane supplier or technician for specific recommendations.

How deep should a gas line be under concrete? Gas lines buried under concrete should typically be at a depth of 18 to 24 inches to protect them from damage and ensure safety.

How often should a gas line be supported? Gas lines should be properly supported at regular intervals to prevent sagging and ensure they are secure. The specific spacing for supports may be specified in local codes and regulations.

How long does a gas line need to hold pressure? Gas lines typically need to hold pressure for a specified duration, such as 10 minutes, during pressure testing to ensure there are no leaks. The exact duration may vary by local codes and standards.

Can I use 5/8 gas line for a dryer? A 5/8-inch gas line is generally not recommended for a dryer. Consult the manufacturer's specifications and local codes to determine the appropriate gas line size for your dryer.

What size gas line is needed for a gas dryer? The size of the gas line needed for a gas dryer can vary depending on the dryer's BTU rating and the length of the gas line. Consult the manufacturer's specifications and local codes for guidance.

Does the size of a gas line matter? Yes, the size of a gas line matters as it directly affects the gas flow and pressure available to appliances. It should be properly sized to meet the BTU requirements of the appliances it serves.

Does gas line diameter matter? Gas line diameter matters because it determines the gas flow capacity. A larger diameter can provide higher gas flow rates, but it should be appropriately sized for the application to avoid problems like pressure drop.

What is the difference between pipe schedule 40 and schedule 80? The main difference between pipe schedule 40 and schedule 80 is the thickness of the pipe walls. Schedule 80 pipes have thicker walls and can handle higher pressure and temperature compared to schedule 40 pipes.

Can you use sch 80 fittings on schedule 40 pipe? You can generally use schedule 80 fittings on schedule 40 pipe as long as they are compatible in terms of material and size. The fittings should be rated for the intended pressure and temperature.

How far should a gas pipe be from an electric cable? The distance between a gas pipe and an electric cable should adhere to local codes and regulations. Common recommendations are to maintain a minimum separation of 12 inches or more, but this can vary.

Can a gas pipe be above an electrical panel? Gas pipes should not be installed directly above electrical panels, as this can obstruct access and create potential safety hazards. Specific clearance requirements may vary by jurisdiction.

Which pipe should be bigger? The choice of pipe size depends on the specific application, gas load, and local codes. Larger pipe sizes are typically used for higher BTU loads and longer pipe runs.

Which pipe is thicker, schedule 40 or schedule 80? Schedule 80 pipes are thicker than schedule 40 pipes, with thicker walls to handle higher pressure and temperature.

Does reducing pipe size increase psi? Reducing pipe size can increase the gas flow velocity but may not necessarily increase the pressure. Pressure depends on factors like the gas source and the resistance within the pipe system.

Does reducing pipe size increase flow rate? Reducing pipe size can increase the gas flow velocity but may not necessarily increase the flow rate, as it depends on various factors, including the pressure and the pipe's characteristics.

What are the basic line formulas? Basic line formulas can refer to a wide range of mathematical equations used in different fields and contexts. To provide specific formulas, more information about the context is needed.

What is the line function rule? The term "line function rule" is not specific, and its meaning may vary depending on the context. It could refer to rules or functions related to a particular line of business or operation within an organization.

Can you go from 1/2 to 3/4 on a gas line? Yes, you can transition from a 1/2-inch gas line to a 3/4-inch gas line using appropriate fittings and adapters to accommodate changes in gas load or to ensure adequate gas flow.

How far can you bend flexible gas line? The maximum allowable bend radius for flexible gas lines, such as corrugated stainless steel tubing (CSST), should be specified by the manufacturer. Exceeding the recommended bend radius can damage the line.