The hydrostatic test method is the mandated and preferred method of pressure testing. [35 FR 13257, Aug. 19, 1970, as amended by Amdt. Test requirements for pipelines to operate at a hoop stress less than 30 percent of SMYS and at or above 100 p.s.i. All personnel should be communicating about starting these activities preferably through the PA system. 5.2. (69 kPa) gage and each main to be operated at or above 1 p.s.i. 192.506 Transmission lines: Spike hydrostatic pressure test. Pneumatic testing introduces hazards that must be identified and understood. Could you please help to determine the safe distance has to barricaded during the pressure test? The NCNR high pressure activity responsible reviews the experiment within this pressure range and may determine to approve the experiment. Thank you for helping keep Eng-Tips Forums free from inappropriate posts.The Eng-Tips staff will check this out and take appropriate action. In order to test, the pipe or pressure vessel must be . You make understand very clearly in a simple language. This video explains How to Calculate the Hydrotest pressure of Vessels and Piping systems as per ASME & PED. . 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. Please let us know here why this post is inappropriate. Except for service lines and plastic pipelines, each segment of a pipeline that is to be operated at a hoop stress less than 30 percent of SMYS and at or above 100 p.s.i. Already a member? Use the Result Table option to display the pipe schedule with nominal wall thickness, minimum wall thickness and pressure design wall thickness for the selected diameter. A separate drafting site Hydrostatic testing presents a much lower safety hazard, associated with the stored . 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. Use the Result Table option to display a table of the diameter and diameter tolerance versus either wall thickness type, diameter tolerance type, or diameter type. Whenever the hoop stress of the segment of the pipeline being tested will exceed 50 percent of SMYS, the operator shall take all practicable steps to keep persons not working on the testing operation outside of the testing area until the pressure is reduced to or below the proposed maximum allowable operating pressure. The eCFR is displayed with paragraphs split and indented to follow (d) For fabricated units and short sections of pipe, for which a post installation test is impractical, a preinstallation strength test must be conducted by maintaining the pressure at or above the test pressure for at least 4 hours. The pipe inside or outside diameter should be the maximum allowed by the code. For piping systems with combined internal and external pressure during operation, the test pressure should be calculated from the internal pressure only. Duration of the test is two hours. For pneumatic test the test factor = 1.1. Safe distance = (0.15)x (D)x (a)^0.4x (p)^0.6. 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). A positive means of . Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. 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. (3) Except for natural gas, nonflammable. Reply. The calculated volume does not include the effect of pipe expansion due to the test pressure. Pressing enter in the search box The pressure fluid at rest generates because of the earth's gravitational pull. 192.507 Test requirements for pipelines to operate at a hoop stress less than 30 percent of SMYS and at or above 100 p.s.i. 3. . (b) The operator shall insure that the test medium is disposed of in a manner that will minimize damage to the environment. (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. citations and headings hbbd``b`>$@AH0] @$R&AqX:Hs$x@bB@PHxy0012se`D"o` pr9 SAFE DISTANCE COMMONLY USED FOR PNEUMATIC TESTS For Stored Energy Less than 27,134KJ Minimum safe Distance= +100Ft =31Mtr For Stored Energy Greater than 27,134KJ Minimum safe Distance= +150Ft =46Mtr The maximum calculated stored energy of any vessel or piping system being pneumatically pressure . Test Pressure. 3 Pressure Vessels Hydrostatic testing for new vessels (field fabricated) shall be. The density of water at 4 o C is 1000 kg/m 3.The pressure acting in water at 1 m can be calculated as. Have you ever wondered what is the pressure level in water compared to the atmospheric pressure? But your every article is very information and in simple language. NJd{2(&glx;9YPr$p; _uo;D]p(]}Y#Xv (7) Leaks and failures noted and their disposition. In our hydrostatic pressure calculator's advanced mode, you can change the gravitational acceleration g and the external pressure p0. The R factor is required if the allowable stress at the test temperature is greater than the allowable stress at the design temperature. This content is from the eCFR and may include recent changes applied to the CFR. will bring you directly to the content. The pressure in the system shall gradually be increased to not more than 1/2 of the test pressure, after which the pressure shall be . please contact me in hasbi.sinaga@gmail.com I'm sure there are still a lot of space for improvement, in terms of pressure testing. (b) If, during the test, the segment is to be stressed to 20 percent or more of SMYS and natural gas, inert gas, or air is the test medium -, (1) A leak test must be made at a pressure between 100 p.s.i. The test pressure should be less than or equal to 1.33 x the design pressure, and less than or equal to 1.35 x the rated pressure for components. Hydro testing hazards and control measures. The test a Pressure was more than 330 bars. Materials of construction should have the required ductility (flexibility). SO YOUR HELP IS VERY IMPORTANT TO US. The minimum safe distance of 30 meters, based on PCC-2 Article 501 Mandatory Appendix 501-III and using the standard . %PDF-1.6 % The formula used is: p = gh = (1000kg/m 3)(9.81m.s-2)(1m) = 9810 Pa. Q2. PLEASE SHARE THIS PAGE WITH YOUR RELEVANT FRIEND AND HELP TO PLANT MORE TREE TO PROTECT NATURE. The dose rate can be calculated from dose volume fraction, dose mass fraction or dose gas ratio. 11, 2015]. The liquid is pressurized within the pipeline or vessel to make sure that it can withstand the pressures of normal usage. And Thank you. Select the pipe schedule (NPS or ISO), pipe diameter and wall thickness, or use the user defined option. No people were in the area during the burst, But some hydro test technicians and engineers had just left the area after having checked the Instrumental data. How To Relate to Differences.. 4.44 lbf -ft is a small number that can be readily grasped; switch to drafting.ecfr.gov. After some study, the inspector decides to run calculations for hydrostatic test height over the first shell course and over a locally thinned area close to a vertical seam, 36 inches high in the 4 th shell course. Nomenclature changes to part 192 appear at 71 FR 33406, June 9, 2006. where. %PDF-1.6 % Consideration to be given for the change of ambient temperature, e.g. Diameter (in) Pipeline Segment Length (ft) Test Pressure (PSI) Testing Allowance (gal/hr) Computed per latest edition ANSI/AWWA C600 Rev 2010. (345 kPa) gage. To fund books on different subject of safety is very difficult task. full text search results 192-60A, 54 FR 5485, Feb. 3, 1989; Amdt. This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Glen safety manual - pressure system safety w/change 1 (6/27/2014) and ASME PCC-2 are also useful documents. 30 U.S.C. In the case of fishes, the whole column of water they have above them plus the atmospheric pressure generates the hydrostatic pressure. p = g h Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. As per ASME B31.3 Section 345.4.2 the hydrostatic test pressure at any point in a metallic piping system shall be as follows: [latexpage] (a) not less than 112 times the design pressure; (b) for design temperature above the test temperature, the minimum test pressure shall be calculated by Eq. p = g h = (1000 kg/m 3) (9.81 m/s 2) (1 m) = 9810 Pa Example - Pressure acting in water at depth 3 ft . 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 The pressure design wall thickness is recommended for corroded piping. a Length/diameter of piece (m) 192.505 Strength test requirements for steel pipeline to operate at a hoop stress of 30 percent or more of SMYS. Only essential personnel are allowed access to the test area, and then only after pressure has been held for a reasonable period. site when drafting amendatory language for Federal regulations: 192-93, 68 FR 53901, Sept. 15, 2003; Amdt. (1) Compatible with the material of which the pipeline is constructed; (2) Relatively free of sedimentary materials; and. This pressure is usually greater than the pipeline's design working pressure. Since the value of stored energy is 224,057,795 J the safe distance to be maintained as per this section is 60m. 192-85, 63 FR 37504, July 13, 1998]. Regulation Y Calculate minimum safe distances between the piping system being pneumatically tested and personnel/plant facilities using ASME . 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. Place the weight hanger on the end of the balance arm and level the arm, using the counter weight, so that the balance arm is horizontal. endstream endobj 891 0 obj <>>>/Filter/Standard/Length 128/O([loK7K\(3B3h)/P -1340/R 4/StmF/StdCF/StrF/StdCF/U(S8PJ 7U )/V 4>> endobj 892 0 obj <>/Metadata 72 0 R/OpenAction 893 0 R/PageLayout/SinglePage/Pages 885 0 R/StructTreeRoot 145 0 R/Type/Catalog>> endobj 893 0 obj <> endobj 894 0 obj <>/Font<>/ProcSet[/PDF/Text/ImageC]/Properties<>>>/XObject<>>>/Rotate 0/StructParents 21/TrimBox[0.0 0.0 612.0 792.0]/Type/Page>> endobj 895 0 obj <>stream To explore fluid pressure further, visit our PSI to GPM calculator. (d) For fabricated units and short sections of pipe, for which a post installation test is impractical, a preinstallation pressure test must be conducted in accordance with the requirements of this section. ny.y}gzma,R RTtfn}SF#1dx^2nOyRP4F^`02vA\C1ej&2Je4&$I,Xv=N8H(~)0AoBS{f6'e904?!d\rq?3SZ8Piw!c? L Minimum Safety Distance, Meter Please provide me safe distance formula during hydrostatic test .And provide me pump selection formula. www.wermac.org uses Very high-pressure hydro-testing use the testing manifold and testing apparatus No alterations or modification permitted without Piping Production Engineers approval. *Eng-Tips's functionality depends on members receiving e-mail. During the hydrostatic test, you must maintain this pressure for at least ten minutes. (689 kPa) gage and the pressure required to produce a hoop stress of 20 percent of SMYS; or. distance limit for personnel during the pneumatic test. Hydro test test Area shall be barricaded and provide warning boards to prevent personnel entry. LTI x 1000000/ Man hours worked what is the base of 1000000. (b) Each operator must maintain a record of each test required by 192.509, 192.511, and 192.513 for at least 5 years. You can Looking forward to reading more of these articles. Position the balance arm on the knife edges and check that the arm swings freely. In addition, in a Class 1 or Class 2 location, if there is a building intended for human occupancy within 300 feet (91 meters) of a pipeline, a hydrostatic test must be conducted to a test pressure of at least 125 percent of maximum operating pressure on that segment of the pipeline within 300 feet (91 meters) of such a building, but in no event may the test section be less than 600 feet (183 meters) unless the length of the newly installed or relocated pipe is less than 600 feet (183 meters). ASME Code B 31.3 provides the basis for test pressure. The maximum diameter is required for high pressure metal pipe calculations. Formula: D s = 63 x T s. where, D s = Minimum Safety Distance *, 63 = OSHA recommended hand speed constant in inches per second, and. (276 kPa) gage must be tested to at least 90 p.s.i. 192.509 Test requirements for pipelines to operate below 100 p.s.i. I have made my own calculation spreadsheet based on PCC. Calculate ASME B31.3 gas volume and liquid chemical dose rate for gas leak test. 4.0 PRESSURE TEST 4.1 Preparation for Pressure Test . arrow_forward. Wear face shields during pneumatic testing. Thanks. Subscribe to: Changes in Title 49 :: Subtitle B :: Chapter I :: Subchapter D :: Part 192 :: Subpart J. thermal expansion of liquids in a closed system. The result will be. Calculate ASME B31.3 process piping hydrotest and pneumatic leak test pressure and hoop stress check. 192.513 Test requirements for plastic pipelines. 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. Hydro testing safe distance formula: For the Hydro test safe distance. The test pressure ratio = 1.25 for hydrotest and for pneumatic leak test. Buy a Subscription to use the tools in plus mode (with plots, tables, goal seek etc). Pressuring equipment should not be left unattended at any time during the test. is it only length or only diameter or length divided by diameter ??? seq., and 49 CFR 1.97. The density of water at 4C = 1000kg/m 3. For hydrotest the test factor = 1.5. `B@-, SAFE DISTANCE CALCULATION HYDROTEST. If you work for a Federal agency, use this drafting Pressure monitoring to be conducted in any adjacent systems that are not positively isolated. 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. To Calculated the Safe distance Click below. (c) Each segment of a service line (other than plastic) intended to be operated at pressures of more than 40 p.s.i. The hoop stress should be less than or equal to 90% of yield. If you had to define a safe distance for this pressure test, were you able to provide this? 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). Safe distance = (0.15)x(D)x(a)^0.4x(p)^0.6. {,L 4. (1) The test must use water as the test medium. a Length/diameter of piece (m) (b) Other technology or other technical evaluation process. Very high-pressure hydro-testing use the testing manifold and testing apparatus No alterations or modification permitted without Piping Production Engineers approval. Many people are unaware of the dangers of pressure testing. The dose rate can be calculated from the dose volume fraction, the dose mass fraction, the dose volume ratio, or the dose mass ratio. We are just following it. It is not an official legal edition of the CFR. 192-74, 61 FR 18517, Apr. For the Hydro test. 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. g is the gravitational acceleration and its value on earth is 9.80655 m/s. Engineering Codes, Standards & Certifications, thread292-225652: Hydrostatic Testing Safety, Low-Volume Rapid Injection Molding With 3D Printed Molds, Industry Perspective: Education and Metal 3D Printing. Pressure Testing and Safe Distance calculation. 192-120, 80 FR 12779, Mar. Close this window and log in. This is an automated process for Environmental protection and safety requirements. If the pressure drops beyond the standard tolerable limit . i9HS,J`k u+l8%w)|$d2t/UYt."wMZNbXJ8w0QCXI-NiC0`I +"(dWsfyuD.*=Cd^qEZA AIf$8KDQen a'O"h:Y)}6&\is&_yi' 185(w)(3), 49 U.S.C. Thanks. 192.515 Environmental protection and safety requirements. The technical storage or access that is used exclusively for statistical purposes. If an inspection is required within the hold period, then pressure should be reduced to 80% of the test figure. To provide the best experiences, we use technologies like cookies to store and/or access device information. You deserve for appreciation. 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). Login. - Other Regulations Relating to Transportation, - Pipeline and Hazardous Materials Safety Administration, Department of Transportation, - Transportation of Natural and Other Gas by Pipeline: Minimum Federal Safety Standards, https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-D/part-192/subpart-J. Above 16,270 Joules (12,000 lbf-ft) of stored energy. Hydrostatic Pressure Calculator. here. 192-124, 83 FR 58719, Nov. 20, 2018]. 192-85, 63 FR 37504, July 13, 1998]. In addition. p0 is the external pressure and is usually atmospheric pressure. p Test pressure (bar) endstream endobj startxref 0 The pneumatic test pressure shall not be less than 1.2 nor more than 1.5 times the design pressure of the piping system. Both had to do with unreliable pipe material. (2) The baseline test pressure must be as specified in the applicable paragraphs of 192.619(a)(2) or 192.620(a)(2), whichever applies. Barricade the testing area to control unauthorized entry. (689 kPa) gage. 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. Based on standard formulas set forth in ANSI Z 16.1. 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. a Length/diameter of piece (m) For gases (4.3) it is : l = 30; 3.6 x cube root of (volume x ( (test pressure + length) - ( (test pressure + length . hbbd```b``.dd"rwV9,nw`0 =$[JA w u g27{#3*rH"W B[ P t = absolute test pressure. By joining you are opting in to receive e-mail. The technical storage or access that is used exclusively for anonymous statistical purposes. For RTR laminated and filament wound pipe, the test pressure should be three times the manufacturers allowable pressure rating. Help Using The Pipeng Toolbox (opens in the popup workbook). Hydro testing safe distance formula: For the Hydro test safe distance Safe distance = (0.15)x(D)x(a)^0.4x(p)^0.6. [35 FR 13257, Aug. 19, 1970, as amended by Amdt. View the most recent official publication: These links go to the official, published CFR, which is updated annually. This app is build to calculate Hydro-test pressure required for Pressure vessel and piping system. 1431.0302 Hydrostatic Testing. This contact form is only for website help or website suggestions. Learn how your comment data is processed. will also bring you to search results. 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 Check out 42 similar fluid mechanics calculators , Use the hydrostatic pressure equation and multiply water density by pool dept and by the constant of gravity. Can you calculate for me for 6inch pipe, 40 meter length and 170 bar pressure testing. Ans: The depth of water column = 1m. 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). Equipment tested and calibrated (QC reviewed), PTW Issued and posted with the M/S (incl. An allowance should be made for the pipe design temperature. 7.1 Hydrostatic Force TNT = S t o r e d E n e r g y 4, 266, 920 (kg) as per equation II-3 from ASME PCC-2 Appendix 501-II. The figure below shows a component of a pipeline, which is launched at a pneumatic pressure test. 35 FR 13257, Aug. 19, 1970, unless otherwise noted. As possible so as to minimize the stored energy. Stress value at test temp. The pressuring valve should be locked in a closed position. information or personal data. All equipment, plant, and devices used for pressure and leak testing are properly rated, adequate calibrated, maintained and checked. find out the Cause of failure and rectified. Transmission lines: Spike hydrostatic pressure test. The Responsible Engineer should authorize tests above normal working pressure. For B31.1 piping systems the hydrotest pressure is often 1.5 P design to which is added a 75 psi test . Hydrostatic Pressure = 1.3 x MAWP or Design Pressure x ( stress value at Test Temperature / stress value at design temprature ). (6) Elevation variations, whenever significant for the particular test. Calculate test pressure for qualification of bonds on plastic pipe and fittings (ASME B31.3 annex A328.2.5). (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. Hydro-static Pressure Calculation for Pressure Vessel: At least, Hydro-static Pressure = 1.3 x Maximum Allowable Working Pressure or MAWP. 192.507. The cause of failure shall be determined and rectified before any further pressure testing is undertaken. Formal records of pressure and leak testing are maintained and kept. If an inspection is required within the hold period, then pressure should be reduced to 80% of the test figure. By joining you are opting in to receive e-mail. You can learn more about the process If you would like to comment on the current content, please use the 'Content Feedback' button below for instructions on contacting the issuing agency. 28 Appendix lll, "Safe Distance Calculations for. Dear sir, Metal 3D printing has rapidly emerged as a key technology in modern design and manufacturing, so its critical educational institutions include it in their curricula to avoid leaving students at a disadvantage as they enter the workforce. where D - Internal diameter (m) a - Length/diameter of the piece (m) p - Test pressure (bar) Safe Distance and Stored Energy Calculator for Piping - Pneumatic Test. Appropriate measures to manage the risk of a potential testing failure must be considered. do yo have valid reference? 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). Calculate test pressure and hoop stress for low pressure plastic pipe (ASME B31.3 section A345). 192-125, 84 FR 52245, Oct. 1, 2019]. Recording . SD = Safe distance in meters Test pressure 120 (psi) Diameter = 42.000 (inches) Wall thickness = 0.500 (inches) Exposed length = 400 (feet) . 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. Event Description: During a hydro test operation of a 32 inch onshore pipeline for gas transportation (not Included in any Sampan scope of work), a section of the pipe burst. Operators must notify PHMSA 90 days in advance of the assessment or reassessment requirements of this subchapter. Personally, I have only two incidents experienced during pressure testing. Print Page. Hydrostatic testing shall be conducted only in the presence of the Engineer. The pressuring valve should be locked in a closed position. What is the pressure acting on the water at a depth of 1m at 4C? (24), except that the value of ST . (c) The pressure must be maintained at or above the test pressure for at least 1 hour. Q1. please clarify. (b) Each main that is to be operated at less than 1 p.s.i. 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. What is the base of 1000000 ? &`~YG?WV#4){U3Z. Please do not provide confidential Thank you for sharing this valuable information with us. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework. Each particle of a liquid is subjected to a gravitational force directed toward the Earth. 2)For hydros testing, a nonhazardous liquid such as water shall be used at temperatures below 32C and over 10C to aid in avoiding condensation during the test. is available with paragraph structure matching the official CFR p Test pressure (bar), Dear Ranjan, Caution tags to identify equipment and lines under test. It specifies to use 1 million. Leakage usually occurs in joints and seams of the system. Our hydrostatic pressure calculator uses the below hydrostatic pressure formula: p = g h + p0, where: p - Hydrostatic pressure; - Density of fluid; g - Gravitational acceleration (the average value for the Earth is g = 9.80665 m/s ); h - Depth; and. (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. The safe evacuation of test liquids/gases. (6.9 kPa) gage but not more than 40 p.s.i. Promoting, selling, recruiting, coursework and thesis posting is forbidden. If you search precisely in internet, you can find an excel sheet prepared by someone to calculate the safe distance for both hydrostatic test and pneumatic test based on Lloyd's register (96-02) T-0240. A hydrostatic test is a way in which all pressur. (b) In a Class 1 or Class 2 location, each compressor station regulator station, and measuring station, must be tested to at least Class 3 location test requirements. Solved Problems on Hydrostatic Pressure. b) Lloyd's register (96-02) T-0240 - Hydrostatic and Pneumatic safe distance. Overview. B Whenever a segment of steel transmission pipeline that is operated at a hoop stress level of 30 percent or more of SMYS is spike tested under this part, the spike hydrostatic pressure test must be conducted in accordance with this section.