safe distance calculator for hydrostatic pressure test safe distance calculator for hydrostatic pressure test

(4) After the test pressure stabilizes at the baseline pressure and within the first 2 hours of the 8-hour test interval, the hydrostatic pressure must be raised (spiked) to a minimum of the lesser of 1.5 times MAOP or 100% SMYS. It specifies to use 1 million. The notification must be made in accordance with 192.18 and must include the following information: (1) Descriptions of the technology or technologies to be used for all tests, examinations, and assessments; (2) Procedures and processes to conduct tests, examinations, assessments, perform evaluations, analyze defects, and remediate defects discovered; (3) Data requirements, including original design, maintenance and operating history, anomaly or flaw characterization; (4) Assessment techniques and acceptance criteria; (5) Remediation methods for assessment findings; (6) Spike hydrostatic pressure test monitoring and acceptance procedures, if used; (7) Procedures for remaining crack growth analysis and pipeline segment life analysis for the time interval for additional assessments, as required; and. y : distance between the pivot and the center of pressure (Figure 1.2). The calculated volume does not include the effect of pipe expansion due to the test pressure. 2- Hydrostatic pressure test, according to the view of the supervisor and the project consultant, is better to calculate based on the pressure (less than the nominal pressure . Close examination of equipment at above maximum allowable working pressure shall not take place until the pressure has been held for 30 min. Vent valves will open after pressure release. Environmental protection and safety requirements. please contact me in hasbi.sinaga@gmail.com (c) Except as provided in paragraph (d) of this section, the strength test must be conducted by mai ntaining the pressure at or above the test pressure for at least 8 hours. The density of water at 32 o F is 1.940 slugs/ft 3.The pressure acting in water at 3 ft can be calculated as. The record must contain at least the following information: (1) The operator's name, the name of the operator's employee responsible for making the test, and the name of any test company used. Hoop stress can be calculated for either the minimum wall thickness (nominal wall thickness minus fabrication allowance), or the pressure design wall thickness (minimum wall thickness minus the corrosion allowance). During the hydrostatic test, you must maintain this pressure for at least ten minutes. However, if the buildings are evacuated while the hoop stress exceeds 50 percent of SMYS, air or inert gas may be used as the test medium. 6.0 INSPECTION & QUALITY CONTROL 7.0 WORK SAFETY 1.0 SCOPE AND PURPOSE This work procedure specifies and covers the requirements and extent of hydrostatic strength . Mechanical isolation used for gas, liquid, or vapor: Pneumatic testing and very high-pressure hydro-testing conducted when the main test area is free of personnel. The average fluid density includes the dose chemical. For the Hydro test safe distanceSafe distance = (0.15)x(D)x(a)^0.4x(p)^0.6, For fluids (3.3) it is :l = 0.15 x internal diameter x ((alpha) ^ 0.4) x ((test pressure / (cube root of density))^ 0.6, For gases (4.3) it is :l = 30; 3.6 x cube root of (volume x ((test pressure + length) ((test pressure + length) ^ 0.714))), where D Internal diameter (m)A Length/diameter of the piece (m)P Test pressure (bar), IF YOU HAVE ANY ISSUE REGARDING PRESSURE TESTING SAFETY PROCEDURES PLEASE COMMENT BELOW. l = 0.15 x internal diameter x ((alpha) ^ 0.4) x ((test pressure / (cube root of density))^ 0.6, For gases (4.3) it is.. Check that any attachments unable to withstand the test pressure must be removed. p Test pressure (bar) The NCNR high pressure activity responsible requests that any pressure equipment or sub-system thereof be submitted to In order to test, the pipe or pressure vessel must be . test, good over-pressure data was collected, but for the second test, the blast wa s much larger and the over-pressures have had to be inferred based on damage to surrounding GCPS 2018 a is length / diameter of piece. Notify me of follow-up comments by email. As per section 501-III-1 (b): Safe Distance (R) = Rs(2TNT)1/3 as per equation III-1 from ASME PCC-2 Appendix 501-III. Formula: D s = 63 x T s. where, D s = Minimum Safety Distance *, 63 = OSHA recommended hand speed constant in inches per second, and. Select the pipe schedule type, diameter, wall thickness and diameter tolerance, or use the user defined option. Calibrated pressure gauges and Pressure safety valves only shall be used. Organization and Purpose Please tell me what means of a and this p The density of water at 4 o C is 1000 kg/m 3.The pressure acting in water at 1 m can be calculated as. Dont trust any freeware provided interwebs document when it comes to determining such important calculations. 192-125, 84 FR 52245, Oct. 1, 2019]. (2) Each potentially hazardous leak has been located and eliminated. Only essential personnel are allowed access to the test area, and then only after pressure has been held for a reasonable period. Personally, I have only two incidents experienced during pressure testing. Thanks. 20. a Length/diameter of piece (m) Materials of construction should have the required ductility (flexibility). We have received your request and will respond promptly. What is the stored energy in 42 NPS pipe, 36 feet length and pressurized to 7.5 psig? 192-85, 63 FR 37504, July 13, 1998; Amdt. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. The test pressure ratio = 1.5 for hydrotest, and pneumatic leak test. Leakage usually occurs in joints and seams of the system. 1 CFR 1.1 The deeper the region below a fluid, the higher the hydrostatic pressure. You make understand very clearly in a simple language. Stress value at test temp. 192-85, 63 FR 37504, July 13, 1998; Amdt. p Test pressure (bar). Calculation of SAFETY DISTANCE for pressure testing, Engineering Codes, Standards & Certifications, Low-Volume Rapid Injection Molding With 3D Printed Molds, Industry Perspective: Education and Metal 3D Printing. This is an old topic discussed earlier . developer resources. Hydrostatic testing shall be conducted only in the presence of the Engineer. 35 FR 13257, Aug. 19, 1970, unless otherwise noted. g is the gravitational acceleration and its value on earth is 9.80655 m/s. Safety Precautions of Hydro Test: 1. %PDF-1.6 % We are just following it. In the event of a failure during the pressure test, the system will be immediately depressurized by cracking the vent on the test pump manifold. Safe Distance for Pressure Testing Calculation of minimum safety distance for pressure testing (LLOYDS Register 96-02) form T-0240 sections 3.3 (fluid) and 4.3 (gas). While pressure generally refers to any force applied into an area, hydrostatic pressure refers to the force that is generated on a region because of having a column of fluid at rest above that region. 7.1 Hydrostatic Force Work carried out by only qualified and experienced persons. The Responsible Engineer should authorize tests above normal working pressure. (e) If a component other than pipe is the only item being replaced or added to a pipeline, a strength test after installation is not required, if the manufacturer of the component certifies that: (1) The component was tested to at least the pressure required for the pipeline to which it is being added; (2) The component was manufactured under a quality control system that ensures that each item manufactured is at least equal in strength to a prototype and that the prototype was tested to at least the pressure required for the pipeline to which it is being added; or. How To Relate to Differences.. 4.44 lbf -ft is a small number that can be readily grasped; Except for service lines and plastic pipelines, each segment of a pipeline that is to be operated below 100 p.s.i. The technical storage or access is necessary for the legitimate purpose of storing preferences that are not requested by the subscriber or user. Promoting, selling, recruiting, coursework and thesis posting is forbidden. The most commonly used units of pressure are: Pa - pascals - it's the SI unit equal to one kilogram per square meter;; psi - pounds per square inch - 1 psi approximately equals 6895 Pa;; bar - it's the metric unit (not part of SI) equal to 100,000 Pa;; mmHg - millimeter of mercury - 1 mmHg approximately equals 133 Pa;; inHg - inch of mercury - 1 inHg approximately equals 0.49 . The hydrotest pressure is set by code, namely, ASME III and ASME B31.1. 192-85, 63 FR 37504, July 13, 1998]. 2.3 Hydrostatic test water discharge will be continually monitored. [Amdt. After the pressure has been released, the vent valves shall be opened. In a pipe 20 mtr long a pressure gauge (P2) is installed 0.5 mtr before outlet and at other end fluid is pumped in pipe at certain intial pressure P1.A flowmeter is installed in line just before P2. (b) The test procedure must insure discovery of all potentially hazardous leaks in the segment being tested. CLICK HERE FOR SAFETY OFFICER INTERVIEW QUESTIONS ANSWERS. The technical storage or access that is used exclusively for statistical purposes. B31.3 Clause 345.2.2 (a) - 10 minutes minimum. Test Pressure. Choosing an item from hb```B ead`PrGZ:@RCOSY@e,Ou>c(]vFqyfEgN6VusI=760p400wtt000Gtt 9 %B@L63XF%f& ,2L'5+/ftc7#a<1_230@9H Hs00C-? Try plus mode using the Plus Mode Demo tools with no login. [35 FR 13257, Aug. 19, 1970, as amended by Amdt. RAJESH GOLDER says: February 2, 2022 at 4:20 pm . The R factor is required if the allowable stress at the test temperature is greater than the allowable stress at the design temperature. ASME VIII Div 1 - my interpretation of UG 99 (g) is test pressure is 1.3 x MAWP. Both had to do with unreliable pipe material. 1.20 atm or 120.94 kPa as per the Omnicalculator tool hydrostatic pressure calculator. Personally, I believe that most accidents can be prevented during pressure testing, if a number of essential conditions, prior to the pressure test, are satisfied. (2) The line must be walked to check for leaks while the hoop stress is held at approximately 20 percent of SMYS. Click Here to join Eng-Tips and talk with other members! `b2k} ,z [V|pU4dr%(Uu$ve,d"[Lv>bJ:?eA_x;xWYnH (689 kPa) gage must be tested in accordance with the following: (a) The pipeline operator must use a test procedure that will ensure discovery of all potentially hazardous leaks in the segment being tested. thermal expansion of liquids in a closed system. LTI x 1000000/ Man hours worked what is the base of 1000000. The test pressure ratio = 1.5 for hydrotest, and 1.1 for pneumatic leak test. How to calculate Hydrotest Pressure? All personnel should be communicating about starting these activities preferably through the PA system. Barricade the testing area to control unauthorized entry. Please do not provide confidential 11, 2015; 86 FR 2241, Jan. 11, 2021]. Inspect all equipment you use for the test such as hoses, pressure gauge, piping, . Hydrostatic testing involves filling the vessels, pipeline or system (which need to be tested) with water, then pressurized with a hydraulic pump until the test pressure reaches (normally 1.5 times design pressure), hold the pressure for a specified time by shutting off the supply valve and checking for any leakage or pressure drop. Without a subpoena, voluntary compliance on the part of your Internet Service Provider, or additional records from a third party, information stored or retrieved for this purpose alone cannot usually be used to identify you. b) Lloyd's register (96-02) T-0240 - Hydrostatic and Pneumatic safe distance. 11, 2015]. To familiarize the workforce with ongoingHydro Testing, Pneumatic Strength Testing, Line Blowing & Filling activities (Pressure Testing) safely All pressure and leak testing must have competed in accordance with the Procedure and Safe Work Method and Formal records of pressure and leak testing are maintained and kept and Work carried out by only qualified and experienced persons. Guidelines set forth in the AWWA M41 Manual and the ANSI/AWWA C600 Standard are as follows: "Test pressure shall be 1.25 times the operating pressure. full text search results Could you please help to determine the safe distance has to barricaded during the pressure test? I must be old. Surprisingly, the same hydrostatic pressure will be present in the huge pool and thin pipe, provided they have the same height. p Test pressure (bar), Dear Ranjan, You can verify it by following the next procedure: To increase hydrostatic fluid pressure at a specific point, we have to increase the vertical distance between the water source and the point. 5- People working near the line under pressure should be reminded to keep the safety distance out of line. If you have questions for the Agency that issued the current document please contact the agency directly. If the fluid is at rest, we call it hydrostatic pressure. Buy a Subscription to use the tools in plus mode (with plots, tables, goal seek etc). Hydro test safety distance. Equipment tested and calibrated (QC reviewed), PTW Issued and posted with the M/S (incl. 192-85, 63 FR 37504, July 13, 1998; 86 FR 2241, Jan. 21, 2021; 86 FR 12836, Mar. Barriers & Signs in place (agreed distance). For pneumatic test the test factor = 1.1. A hydrostatic test is a pressure test method that uses a liquid as a fluid medium in order to increase the pressure of a piping system to the desired target final test pressure. [35 FR 13257, Aug. 19, 1970, as amended by Amdt. I'm sure there are still a lot of space for improvement, in terms of pressure testing. Hydrostatic Pressure Formula. Help Using The Pipeng Toolbox (opens in the popup workbook). Pneumatic testing is done at a smaller pressure 1.1 - 1.25 x design pressure out of consideration for the danger. Promoting, selling, recruiting, coursework and thesis posting is forbidden. The official, published CFR, is updated annually and available below under 192.509 Test requirements for pipelines to operate below 100 p.s.i. The dose rate can be calculated from dose volume fraction, dose mass fraction or dose gas ratio. For high pressure high temperature pipe the design stress should be divided by 1.155. Learn how your comment data is processed. This web site is designed for the current versions of Instrument and control piping may be pressure tested using air, natural gas or inert . However, inspectors still have to crawl over the unit to look for leaks. A tank will be subjected to hydrostatic testing after repairs. The Office of the Federal Register publishes documents on behalf of Federal agencies but does not have any authority over their programs. will also bring you to search results. NJd{2(&glx;9YPr$p; _uo;D]p(]}Y#Xv For hydrotest the test factor = 1.5. For plastic pipe use the Barlow's equation mid wall option, with the pipe nominal diameter. 914 0 obj <>stream As per rules for Pressure testing Lloyds register (96-02) Calculation of minimum safety distance for pressure testing (LLOYDS Register 96-02) form T-0240 sections 3.3 (fluid) L = 0.15 x D x 0.4 x (P / )0.6. Test requirements for pipelines to operate below 100 p.s.i. Vent valves will open after pressure release. Blanking devices (spades blinds etc.) An allowance should be made for the pipe design temperature. Because the stored energy associated with a pneumatic test is much higher than a hydrostatic test, due to the compressibility of the air used in lieu of water, certain precautions should be taken when . Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Consideration to be given for the change of ambient temperature, e.g. 1. If feasible, the service line connection to the main must be included in the test; if not feasible, it must be given a leakage test at the operating pressure when placed in service. (6.9 kPa) gage must be tested to at least 90 p.s.i. Werner Slken 2008 - Hydrostatic Pressure = 1.3 x MAWP or Design Pressure x ( stress value at Test Temperature / stress value at design temprature ). &`~YG?WV#4){U3Z. information or personal data. SO YOUR HELP IS VERY IMPORTANT TO US. It specifies to use 1 million. %PDF-1.6 % Title 49 was last amended 2/03/2023. Calculate ASME B31.3 process piping hydrotest and pneumatic leak test pressure and hoop stress check. Effective communication should be established. Persons supervising pressure/leak tests must be trained, competent and qualified. An alternative leak test is only permitted by ASME B31.3 when: Exposure of the piping to water via a hydrostatic test would damage the linings or internal insulation, or contaminate a process that would be hazardous, corrosive, or inoperative in the presence of moisture; and Close examination of equipment at above maximum allowable working pressure shall not take place until the pressure has been held for 30 min. Overview of TLV and BEI and how they can make a big difference to workplace safety. (276 kPa) gage must be given a leak test at a pressure of not less than 50 p.s.i. The pipe inside or outside diameter should be the maximum allowed by the code. in this article, we will summarize the safe procedure of Pressure testing including hydro and pneumatic test safe Distance Calculation. You deserve for appreciation and reward. I recommend you make your own. The formula discussed was safe distance = (0.15) x (D) x (a)^0.4 x (p)^0.6 where D - internal diameter (m) a - length / diameter of piece (m) p - test pressure (bar) The key is to release the pressure gradually to a safe location, where no one will be impacted. Calculate ASME B31.3 metal pipe maximum and minimum diameter from diameter tolerance. These devices should be clearly visible to the person controlling the pressure. Select the pipe schedule (NPS or ISO), pipe diameter and wall thickness, or use the user defined option. Calculate ASME B31.3 gas volume and liquid chemical dose rate for gas leak test. The figure below shows a component of a pipeline, which is launched at a pneumatic pressure test. After the pressure has been released, the vent valves shall be opened. The R factor is required if the allowable stress at the test temperature is greater than the allowable stress at the design temperature. here. 192-120, 80 FR 12779, Mar. Hydrostatic pressure is a specific type of pressure. Check that any attachments unable to withstand the test pressure must be removed. seq., and 49 CFR 1.97. However, I can't find the document for confirmation. - Pressure tests on the piping . For B31.1 piping systems the hydrotest pressure is often 1.5 P design to which is added a 75 psi test . Control has to be given during this stage too. Calculate ASME B31.3 general pipe test pressure and hoop stress check from operating pressure, diameter, wall thickness, wall thickness tolerance and design stress. 909 0 obj <>/Encrypt 891 0 R/Filter/FlateDecode/ID[<4CE15B989B691246B67B596FD798D7F8>]/Index[890 25]/Info 889 0 R/Length 90/Prev 324900/Root 892 0 R/Size 915/Type/XRef/W[1 2 1]>>stream This subpart prescribes minimum leak-test and strength-test requirements for pipelines. (d) During the test, the temperature of thermoplastic material may not be more than 100 F (38 C), or the temperature at which the material's long-term hydrostatic strength has been determined under the listed specification, whichever is greater. Witnesses reported That the water coming out of the rupture hit a small pile of earth and rocks, projecting the Rocks about 50 meters away at a very high speed. Calculate ASME B31.3 metal pipe diameter, minimum wall thickness and pressure design thickness from pipe schedule or user defined diameter and wall thickness (ASME B31.3 section 304.1). www.wermac.org uses endstream endobj 897 0 obj <>stream Safe distance = (0.15)x (D)x (a)^0.4x (p)^0.6. The test pressure should be 1.5 times the design pressure for hydrotest, or 1.1 times the design pressure for pneumatic test. The test a Pressure was more than 330 bars. (3) Except for natural gas, nonflammable. Hydro testing hazards and control measures. The liquid is pressurized within the pipeline or vessel to make sure that it can withstand the pressures of normal usage. This pressure is usually greater than the pipeline's design working pressure. The formula for hydrostatic pressure is \(p=\rho\times g\times h\) Where, p = the pressure exerted by the liquid in \(N.m^2\), Pa. = the density of the liquid in \(kg.m^3\) g = the acceleration due to gravity = \(9.81ms^2\) h = the height of the fluid column in m. Steps to Calculate Hydrostatic Pressure Calculate test pressure and hoop stress for low pressure plastic pipe (ASME B31.3 section A345). [35 FR 13257, Aug. 19, 1970, as amended by Amdt. 30 U.S.C. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Then, calculate the hydrostatic pressure test value. The R factor is the ratio of allowable stress at the test temperature over the allowable stress at the design temperature. Shell courses are 6ft . where D - Internal diameter (m) Explain mathematic questions site when drafting amendatory language for Federal regulations: The average fluid density includes the dose chemical. 2. Only essential personnel are allowed access to the test area, and then only after pressure has been held for a reasonable period. For pressure testing of a component that will be used in service, the pressure is usually 1.3 - 1.5 x design pressure, which keeps the material from yielding, but subjects it to more stress that it will see in service. thanks, where D Internal diameter (m) Hydrostatic testing presents a much lower safety hazard, associated with the stored . Inspectors crawl all over the unit to look for drips. (689 kPa) gage must be leak tested in accordance with the following: (a) The test procedure used must ensure discovery of all potentially hazardous leaks in the segment being tested. (c) The test pressure must be at least 150% of the maximum operating pressure or 50 psi (345 kPa) gauge, whichever is greater. conducted as per 32-SAMSS-004 and the original construction code. contact the publishing agency. (a) An operator must make, and retain for the useful life of the pipeline, a record of each test performed under 192.505, 192.506, and 192.507. Add 50 grams to the weight hanger. When the test pressure has been reached, the pressuring equipment shall be isolated from the equipment under test and where perform-able disconnected. Have you ever wondered what is the pressure level in water compared to the atmospheric pressure? Reference : ANSI/ASME B31.3 : Process Piping (2018), [FREE] tools are free in basic mode with no login (no plots, tables, goal seek etc). Position the balance arm on the knife edges and check that the arm swings freely. Already a member? %%EOF 26, 1996; Amdt. A hydrostatic test is a way in which all pressur. Not consenting or withdrawing consent, may adversely affect certain features and functions. learn more about the process here. Search & Navigation citations and headings Since the value of stored energy is 224,057,795 J the safe distance to be maintained as per this section is 60m. Please let us know here why this post is inappropriate. (a) In conducting tests under this subpart, each operator shall insure that every reasonable precaution is taken to protect its employees and the general public during the testing. All personnel should be communicating about starting these activities preferably through the PA system. 890 0 obj <> endobj The pressuring valve should be locked in a closed position. Caution tags to identify equipment and lines under test. ASME B31.3 hydrostatic pressure must be raised above 1.5 times design pressure in proportion to yield strength at test temperature divided by strength at design temperature but not to exceed yield strength at test temperature. Minimum wall thickness is recommended for new piping, or piping in as new condition. 192-120, 80 FR 12779, Mar. Consideration to be given for the change of ambient temperature, e.g. Step 6: If the line becomes air-free, then start the pump to pressurize the water inside the pipe of equipment. The result will be. i9HS,J`k u+l8%w)|$d2t/UYt."wMZNbXJ8w0QCXI-NiC0`I +"(dWsfyuD.*=Cd^qEZA AIf$8KDQen a'O"h:Y)}6&\is&_yi' The deeper we are, the more such particles are above us, and the higher the fluid pressure (because the acting force is greater - see our pressure calculator). Calculating the safe distance (R) in accordance with equation below. For hydrotest the test factor = 1.5. If you have comments or suggestions on how to improve the www.ecfr.gov website or have questions about using www.ecfr.gov, please choose the 'Website Feedback' button below. Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a parts function at the center of their design considerations. Know how to handle a hammer -Safety Moment #4, Ticks Threats when working outdoors -Safety Moment #16, https://www.youtube.com/watch?v=kVdFZ9ToI9U&list=PLv2vIPIAyhPCciKJpWSbvKoKqkHhig1Q9, Tool Box Talk: Dont Let Chemicals Get to You, Tool Box Talk: Winter Driving Safety Tips, Tool Box Talk: Working Around Heavy Equipment, Photo of the day: Hearing Protection Device Selection, Free ISO 14001:2015 Environmental Management System Audit Checklist Download. The technical storage or access is required to create user profiles to send advertising, or to track the user on a website or across several websites for similar marketing purposes. Pressure monitoring to be conducted in any adjacent systems that are not positively isolated. a Length/diameter of piece (m) For high pressure pipe select the log equation option. Effective communication should be established. (5) Pressure recording charts, or other record of pressure readings. Duration of the test is two hours. 4. What determines the pressure? (689 kPa) gage. Hydrostatic testing is the most common method employed for testing pipes and pressure vessels. Guys, The length of time it takes to check all joints (welded, bolted or threaded) is the minimum length of time required for the test. endstream endobj startxref The test pressure ratio = 1.25 for hydrotest and for pneumatic leak test. 192.513 Test requirements for plastic pipelines. (b) The test medium must be liquid, air, natural gas, or inert gas that is -. Calculate test pressure for qualification of bonds on plastic pipe and fittings (ASME B31.3 annex A328.2.5). regarding that Frequency calculation LTI x 1000000/man-hours worked. 195-94, 69 FR 54592, Sept. 9, 2004; Amdt. Hydro testing safe distance formula: For the Hydro test safe distance. Could anyone advise me the Calculation of SAFETY DISTANCE for pressure testing; Based on my knowledge the following Code covers the equation; a) ASME PCC 2 Article 5.1, Mandatory Appendix III - Pneumatic safe distance. Example: Calculate the pressure acting on a diver in the ocean at the depth of 15 m. The density of ocean water is 1022 kg/m and the atmospheric pressure is 101325 Pa. 192-58, 53 FR 1635, Jan. 21, 1988; Amdt. ny.y}gzma,R RTtfn}SF#1dx^2nOyRP4F^`02vA\C1ej&2Je4&$I,Xv=N8H(~)0AoBS{f6'e904?!d\rq?3SZ8Piw!c? where. If the test temperature is lower than the operating temperature, the design pressure should be multiplied by the ratio of the design stress at the test temperature, over the design stress at the operating temperature (except for low pressure pneumatic test). Keep going. Calculateminimum safe distances between the piping system being pneumatically tested and personnel/plant facilities using ASME PCC-2 Mandatory Appendix 501-II and III equations. (621 kPa) gage, except that each segment of a steel service line stressed to 20 percent or more of SMYS must be tested in accordance with 192.507 of this subpart. Microsoft Edge, Google Chrome, Mozilla Firefox, or Safari. An interesting fact is that the value of hydrostatic pressure does not depend on the size and shape of the tank but only on the depth. If you would like to comment on the current content, please use the 'Content Feedback' button below for instructions on contacting the issuing agency. The pneumatic test pressure shall not be less than 1.2 nor more than 1.5 times the design pressure of the piping system. PLEASE SHARE THIS PAGE WITH YOUR RELEVANT FRIEND AND HELP TO PLANT MORE TREE TO PROTECT NATURE.