United States. NOTE 2Consult with pipe and appurtenance manufacturer for maximum test pressure for pipe size greater than 30 in. NOTE 1Consult with pipe and appurtenance manufacturer for maximum test pressure for pipe size greater than 30 in.
Apparatus 6. Safety Precautions 5. It is extremely important that the various valve, input pressure gauge, and a continuous monitoring plugs be properly installed, restrained and braced to prevent the pressure gauge having a pressure range from 0 psi to at least 10 sudden expulsion of a poorly installed or partially inflated plug. Do not exceed 9. For example, the axial cubic feet per minute per square foot of internal pipe surface force on an in.
Restraint systems must be designed to handle these forces with area. Every effort should be made to maintain backfill 8. Disconnect the air supply and decrease the pressure to 3. Determine pressure drap time per 7. Preparation of the Line 8. If the rate of air loss is greater than or equal to the minimum time for the pipe diameter and length per Table 8.
Procedures 1, the installation is acceptable. If the rate of air loss is greater than or equal prevent air leakage. All plugs and caps shall be securely braced to the minimum time for the pipe diameter and length per Table to prevent blow-out. One of the plugs or caps shall have an 2, the installation is acceptable. NOTE 4The time-pressure drop method assumes an atmospheric pressure of Locations of high altitude need compensation for 8.
The air equipment shall criteria. Caps and plugs shall not be removed the test section. Test Time Calculations air supply so that the pressure is maintained between 3.
The pressure 9. Before this air testing practice is used, the ground water level should be lowered by pumping or Table 1 contains the specified minimum times required for a dewatering. Reduce pressure to 3. The air-flow rate in standard Q. Convert this air-flow rate to actual cubic feet per minute of air leaking 9. The requirements for air loss considered excessive and the section of pipe has failed the test. See Table 2. L1, L2, etc. If the recomputed test time is short enough to allow the section tested to pass, then the test section meets the require- 9.
The maximum permissible air Precision and Bias loss shall not exceed Q. If the test section fails, time shall Keywords T 5 0. Nonmandatory Information. Since ft exceed the ft length associated practice, the following examples have been prepared. The with the minimum test time for an 8 in. No lateral connections exist in the is s or 8 min and 17 s. What is the required test time for a 1. What is the required test time for a 0. For ft of 12 in. Since 82 ft is less than the 99 ft length X1.
A total of ft of 4 in. Thus, the required test time for to the ft section and will be included in the test. What will a 0. A total of ft of selecting test times see 9. Therefore, the required test time nominal 6 in. The specified pressure drop, which will be timed, is 0. What is the appropriate test time for this pipe X1.
Table 2 is used for a 0. Table 1 is used because a 1. The fourth column in the table gives the. A total of ft of nominal 4 in. Thus, for ft of 8 in. However, should the T 5 section fail to meet this test, recalculate the required holding The required test time is actually only s or 5 min and 17 s for a 1. This recalcu- psig pressure drop.
Therefore, if the section can meet this test time, it shall lation is required because the total internal pipe surface area is be accepted. NOTE X1. This does not mean that the two are testing sewer lines. Refs 1, 2, and 3 4 unrelated. It has been established that lower air loss rates are associated with lower leakage rates. Committee F17 has identified the location of selected changes to this standard since the last issue F that may impact the use of this standard. Approved August 1, ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard.
Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years and if not revised, either reapproved or withdrawn.
Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.
If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phone , fax , or service astm.
Permission rights to photocopy the standard may also be secured from the ASTM website www. Open navigation menu. Close suggestions Search Search. User Settings. Skip carousel. Carousel Previous. Carousel Next. What is Scribd? Significance and Use 4. This practice is not intended to show total system water leakage limits and shall not be used as a quantitative measure of leakage under service conditions for infiltration or exfiltration.
NOTE 1A finding of acceptable air loss specified in this practice can be interpreted as an installation acceptance test in lieu of infiltration or exfiltration testing. Apparatus 5. NOTE 2Consult with pipe and appurtenance manufacturer for maximum test pressure for pipe size greater than 30 in.
Pipe Diameter, in. NOTE 1Consult with pipe and appurtenance manufacturer for maximum test pressure for pipe size greater than 30 in. It is extremely important that the various plugs be properly installed, restrained and braced to prevent the sudden expulsion of a poorly installed or partially inflated plug. Observe the following minimum safety precautions: 6.
Do not exceed 9. Safety Precautions 6. For example, the axial force on an in. F 11a lb. Restraint systems must be designed to handle these forces with adequate safety factors. Every effort should be made to maintain backfill over the pipe during air testing.
Preparation of the Line 7. This cleaning serves to eliminate debris and produce consistent results. Procedures 8. All plugs and caps shall be securely braced to prevent blow-out. One of the plugs or caps shall have an inlet tap, or other provision for connecting an air hose to a portable air control source. The air equipment shall consist of necessary valves and pressure gages to control an oil-free air source, to control the rate at which air flows into the test section, and to enable monitoring of the air pressure within the test section.
The pressure will normally drop slightly until equilibrium is obtained; however, a minimum of 3. NOTE 3All test pressures are measured as gauge pressure, which is any pressure greater than atmospheric pressure. Since water produces a pressure of 0.
If the ground water level is 2 ft or more above the top of the pipe at the upstream end, or if the air pressure required for the test is greater than 9-psi gauge, this air testing practice should not be used. Before this air testing practice is used, the ground water level should be lowered by pumping or dewatering. Reduce pressure to 3. The air-flow rate in standard cubic feet per minute is read directly by a rotameter.
Convert this air-flow rate to actual cubic feet per minute of air leaking from the test section by using the absolute pressure and temperature in the test section. The requirements for air loss under the constant pressure method shall be considered satis-.
Disconnect the air supply and decrease the pressure to 3. Determine pressure drap time per 8. If the rate of air loss is greater than or equal to the minimum time for the pipe diameter and length per Table 1, the installation is acceptable. If the rate of air loss is greater than or equal to the minimum time for the pipe diameter and length per Table 2, the installation is acceptable. NOTE 4The time-pressure drop method assumes an atmospheric pressure of Locations of high altitude need compensation for variation in atmospheric pressure to maintain the same air leakage test criteria.
Caps and plugs shall not be removed until all air pressure in the test section has been reduced to atmospheric pressure. Test Time Calculations 9. Table 1 contains the specified minimum times required for a 1. If the line fails the test, segmented testing may be utilized solely to find the location of leaks. Once leaks are located and repaired, retest the completed pipe installation to requirements of this practice. F 11a 9. See Table 2. NOTE 5It is not necessary to hold the test for the entire period of time in Table 1 or Table 2 when it is evident that the rate of air loss is zero or less than the allowable, and is authorized by the approving authority.
The maximum permissible air loss shall not exceed Q. If the test section fails, time shall be recomputed to include all the lateral lengths using the following equation: T 5 0. If the recomputed test time is short enough to allow the section tested to pass, then the test section meets the requirements of this practice.
Precision and Bias No lateral connections exist in the reach. What is the required test time for a 1. For ft of 12 in. A total of ft of 4 in. What will be the required test time for a 0.
Therefore, the required test time will be 9 min and 58 s as shown in Table 2. NOTE X1. Table 1 is used because a 1. Therefore, the required test time for a 1. What is the required test time for a 0. Since 82 ft is less than the 99 ft length associated with the minimum test time for a 24 in.
Thus, the required test time for a 0. A total of ft of nominal 6 in. All laterals have been capped or plugged, or both, and will be tested together with the 15 in. The specified pressure drop, which will be timed, is 0.
What is the appropriate test time for this pipe network? Table 2 is used for a 0. The fourth column in the table gives the appropriate formula for calculating the required test time because ft is longer than the third column value of ft. The examples have been designed to illustrate the use of Table 1 and Table 2 and the formula in 9. The required test time is s or 18 min and 20 s. A total of ft of nominal 4 in. What will be the required test time for a 1. Thus, for ft of 8 in. However, should the section fail to meet this test, recalculate the required holding time, taking into account the connected laterals.
This recalculation is required because the total internal pipe surface area is less than ft2. Total area 5 p. Using the equation provided in 9. T 5 The required test time is actually only s or 5 min and 17 s for a 1. Therefore, if the section can meet this test time, it shall be accepted. Refs 1, 2, and 3 4 X2. The boldface numbers in parentheses refer to the references listed at the end of this practice. This does not mean that the two are unrelated. It has been established that lower air loss rates are associated with lower leakage rates.
Approved August 1, Committee F17 has identified the location of selected changes to this standard since the last issue F that may impact the use of this standard. F 11a ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility.
This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years and if not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below.
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