Car fuel distribution pipe location

This module is exposed to moisture and corrosive road salt due to its location on the frame rail.

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In the northeast, shops see more rust than some areas of the country, so straps, tanks, and steel fuel lines are more popular replacement items here than in some other markets. They also see a more cases of filler neck failures due to rust-through. Aftermarket or salvage yard filler necks may only be supplied as partial units, without rubber fill and vent hoses. Old hoses are prone to cracking and dry-rot and should be replaced, as they are a potential source of liquid and vapor leakage.

Replacement hoses should be rated for fuel or fuel vapor; coolant hoses will not hold up to long-term fuel exposure. The fuel cap should also be checked for fitment. If the cap does not fit the replacement filler neck correctly, or is in poor condition, it should be discarded in favor of a new cap.

Fuel Systems Explained

In some cases, these recommendations are simply suggested as convenience items when replacing a failed pump, but sometimes they prove to be necessary items to maintain or restore system integrity. The vehicle shown is a Oldsmobile Bravada 4.

International Fuel Gas Code 2015 (IFGC 2015)

Some procedures may vary depending on your model. The vehicle shown is a 2 door GMC Jimmy with a 4. Related Information. Watch Video. Piping, tubing and fittings shall either be tested by an approved third-party testing agency or certified by an approved thirdparty certification agency.

How to Test a Fuel Pump in Under 15 Minutes

Piping systems shall be of such size and so installed as to provide a supply of gas sufficient to meet the maximum demand and supply gas to each appliance inlet at not less than the minimum supply pressure required by the appliance. The volumetric flow rate of gas to be provided shall be the sum of the maximum input of the appliance s served. The total connected hourly load shall be used as the basis for pipe sizing, assuming that all appliances could be operating at full capacity simultaneously. Where a diversity of load can be established, pipe sizing shall be permitted to be based on such loads.

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The volumetric flow rate of gas to be provided shall be adjusted for altitude where the installation is above 2, feet m in elevation. Gas piping shall be sized in accordance with one of the following: 1. Pipe sizing tables or sizing equations in accordance with Section Other approved engineering methods.

Where Tables Where Equations and are used to size piping or tubing, the pipe or tubing shall have smooth inside walls and the pipe length shall be determined in accordance with Section The pipe size of each section of gas piping shall be determined using the longest length of piping from the point of delivery to the most remote outlet and the load of the section. Pipe shall be sized as follows: 1. Pipe size of each section of the longest pipe run from the point of delivery to the most remote outlet shall be determined using the longest run of piping and the load of the section.

The pipe size of each section of branch piping not previously sized shall be determined using the length of piping from the point of delivery to the most remote outlet in each branch and the load of the section. The pipe size for each section of higher pressure gas piping shall be determined using the longest length of piping from the point of delivery to the most remote line pressure regulator.

The pipe size from the line pressure regulator to each outlet shall be determined using the length of piping from the regulator to the most remote outlet served by the regulator. The design pressure loss in any piping system under maximum probable flow conditions, from the point of delivery to the inlet connection of the appliance , shall be such that the supply pressure at the appliance is greater than or equal to the minimum pressure required by the appliance.

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The maximum design operating pressure for piping systems located inside buildings shall not exceed 5 pounds per square inch gauge psig 34 kPa gauge except where one or more of the following conditions are met: The piping system is welded. The piping is located in a ventilated chase or otherwise enclosed for protection against accidental gas accumulation. The piping is located inside buildings or separate areas of buildings used exclusively for any of the following: Industrial processing or heating.

Boiler or mechanical rooms. The piping is a temporary installation for buildings under construction. The piping serves appliances or equipment used for agricultural purposes. The piping system is an LP-gas piping system with a design operating pressure greater than 20 psi Materials used for piping systems shall comply with the requirements of this chapter or shall be approved. Pipe, fittings, valves and other materials shall not be used again except where they are free of foreign materials and have been ascertained to be adequate for the service intended.

Material not covered by the standards specifications listed herein shall be investigated and tested to determine that it is safe and suitable for the proposed service, and, in addition, shall be recommended for that service by the manufacturer and shall be approved by the code official. Metallic pipe shall comply with Sections Steel and wrought-iron pipe shall be not less than standard weight Schedule 40 and shall comply with one of the following standards: 1.

ASME B ASTM A Copper and copper alloy pipe shall not be used if the gas contains more than an average of 0. Threaded copper, copper alloy and aluminum-alloy pipe shall not be used with gases corrosive to such materials. Aluminum-alloy pipe shall be marked at each end of each length indicating compliance. Aluminum-alloy pipe shall be coated to protect against external corrosion where it is in contact with masonry, plaster or insulation, or is subject to repeated wettings by such liquids as water, detergents or sewage. Aluminum-alloy pipe shall not be used in exterior locations or underground.

Seamless copper, aluminum alloy and steel tubing shall not be used with gases corrosive to such materials.


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Copper and copper alloy tubing shall not be used if the gas contains more than an average of 0. Aluminumalloy tubing shall be coated to protect against external corrosion where it is in contact with masonry, plaster or insulation, or is subject to repeated wettings by such liquids as water, detergent or sewage. Aluminum-alloy tubing shall not be used in exterior locations or underground.

Plastic pipe, tubing and anodeless risers shall comply with the following: 1. Factory-assembled anodeless risers shall be recommended by the manufacturer for the gas used and shall be leak tested by the manufacturer in accordance with written procedures. Service head adapters and field-assembled anodeless risers incorporating service head adapters shall be recommended by the manufacturer for the gas used, and shall be designed and certified to meet the requirements of Category I of ASTM D , and U.

The manufacturer shall provide the user with qualified installation instructions as prescribed by the U.


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  • The use of plastic pipe, tubing and fittings in undiluted liquefied petroleum gas piping systems shall be in accordance with NFPA PVC vent piping shall not be installed indoors. Pipe, tubing and fittings shall be clear and free from cutting burrs and defects in structure or threading, and shall be thoroughly brushed, and chip and scale blown.

    Defects in pipe, tubing and fittings shall not be repaired. Defective pipe, tubing and fittings shall be replaced. Where in contact with material or atmosphere exerting a corrosive action, metallic piping and fittings coated with a corrosion-resistant material shall be used. External or internal coatings or linings used on piping or components shall not be considered as adding strength. Pipe with threads that are stripped, chipped, corroded or otherwise damaged shall not be used. Where a weld opens during the operation of cutting or threading, that portion of the pipe shall not be used.

    Field threading of metallic pipe shall be in accordance with Table TABLE Thread joint compounds shall be resistant to the action of liquefied petroleum gas or to any other chemical constituents of the gases to be conducted through the piping.

    The type of piping joint used shall be suitable for the pressure-temperature conditions and shall be selected giving consideration to joint tightness and mechanical strength under the service conditions. The joint shall be able to sustain the maximum end force caused by the internal pressure and any additional forces caused by temperature expansion or contraction, vibration, fatigue or the weight of the pipe and its contents.

    Pipe joints shall be threaded, flanged, brazed or welded. Brazing alloys shall not contain more than 0. Flared joints shall be used only in systems constructed from nonferrous pipe and tubing where experience or tests have demonstrated that the joint is suitable for the conditions and where provisions are made in the design to prevent separation of the joints. Metallic fittings shall comply with the following: 1.

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    Threaded fittings in sizes larger than 4 inches mm shall not be used. Fittings used with steel or wrought-iron pipe shall be steel, copper alloy, malleable iron or cast iron. Fittings used with copper or copper alloy pipe shall be copper or copper alloy. Fittings used with aluminum-alloy pipe shall be of aluminum alloy. Cast-iron fittings: 5. Flanges shall be permitted. Bushings shall not be used. Fittings shall not be used in systems containing flammable gas-air mixtures.

    Fittings in sizes 4 inches mm and larger shall not be used indoors except where approved. Fittings in sizes 6 inches mm and larger shall not be used except where approved. Aluminum-alloy fittings. Threads shall not form the joint seal. Zinc aluminum-alloy fittings. Special fittings. Where pipe fittings are drilled and tapped in the field, the operation shall be in accordance with all of the following: 9. The operation shall be performed on systems having operating pressures of 5 psi The drilling and tapping operation shall be performed in accordance with written procedures prepared by the gas supplier.

    The fittings shall be located outdoors.