pfi-es-04 (1985)

STDSPFI E S - V - E N G L 1785 71b1i5q'4 00004b0 30b

PFI Standard ES-4 (Revised 1985)

(Reaffirmed March 1999)

HYDROSTATIC TESTING OF FABRICATED PIPING

Prepared by

Pipe Fabrication Institute Engineering Committee

All PFI Standards are advisory only. There is no agreement to adhere to any PFI Standard and their use by anyone is entirely voluntary.

Copyright by

PIPE FABRICATION INSTITUTE Dedicnted to Teclinicnl Advnnceiiieiits niid Stniidni.dimiion i i i

ilre Pipe Fnbricniion Iiiditsii-~

Sirice 1913 USA CANADA

PMB 323 61 I Peiinsjfvni7in Aveiiire SE

655. 3 P d rive. sirite 201 Lachine. Qiceùec

Wnsliing/oii. DC 20003 H8T3G6 WEB SITE

I r i t p : / / ~ ~ ~ ~ i ~ ~ ~ . p ~ - i n s t i / i c t e . org

COPYRIGHT Pipe Fabrication InstituteLicensed by Information Handling ServicesCOPYRIGHT Pipe Fabrication InstituteLicensed by Information Handling Services

STDmPFI ES-4-ENGL Il785



HYDROSTATIC TESTING OF FABRICATED PIPING

1. Scope 1.1 To establish a standard for hydrostatic testing of

fabricated piping.

all low-pressure filling lines and other appurtenances, that should not be subjected to the test pressures, have been disconnected or isolated by valves or other suitable means.

2. Time of Tests 4.4 Following the application of the test pressure, examination for leakage shall be made of all joints and connections. 2.1 Hydrostatic testing of fabricated piping assemblies

is usually accomplished after installation when the completed system is tested. Testing of sub- assemblies in the fabricator’s shop may be 5. Test Pressure Requirements necessary when the completed system is designed andior supported so that it cannot be filled with water or when the system cannot be readily dried and traces of the test medium cannot be tolerated in the system. In any case, piping assemblies are hydrostatically tested in the shop only when so specified in the contract documents.

5.1 The assembly shall be subjected to a hydrostatic test pressure not less than 1.5 times the design pressure or as specified by the applicable code.

5.2 The hydrostatic test pressure shall not exceed the maximum allowable test pressure of any non- isolated component in the assembly.

3. Preparation for Testing 5.3 The hydrostatic test pressure shall be maintained

3.1 All joints, including welds, shall be left uninsulated and exposed for examination during the test.

for a minimum total time of ten minutes or as specified.

3.2 All openings should be sealed using plugs, blind 6. Pressure Test Gages 6.1 Pressure test gages used in pressure testing shall be flanges, weld caps, or other suitable material which

can be readily and completely removed after completion of the test.

indicating pressure gages and shall be connected directly, where possible, to the component.

3.3 Means shall be provided to isolate the assembly being tested from the fill piping and pump by using a valve, suitable for the test pressure, and located as close to the assembly as possible.

4. Testing Procedure

being filled. 4.1 Assemblies shall be purged of air pockets while

4.2 Water, at the temperature and chemical content of the available source, shall normally be used for the hydrostatic test fluid. Any special requirements as to chemical content of the water, the use of other test mediums andor temperature shall be so specified in the contract documents.

4.3 The test equipment shall be examined before pressure is applied to ensure that it is tight and that

6.2 Pressure gages used in testing shall preferably have dials graduated over a range of about double the intended maximum test pressure, but in no case shall the rage be less than 1-112 nor more than 4 times the test pressure.

6.3 Pressure gages shall be calibrated prior to use.

7. Acceptance Standards 7.1 If no indication of leakage is observed, the

assembly is considered acceptable.

7.2 If any leakage is observed, its location shall be marked. The assembly shall then be depressurized and the leaks repaired. After repairs have been made, the assembly shall be retested.

2




8. Records 8. I A record of each hydrostatic test shall be made.

These records shall include:

A. Date of Test B. Identification of Fabricated Piping

Assemblies Tested C. Test Medium Used D. Test Pressure and Holding Time E. Signatures of the Company’s Inspector and

the Authorized Inspector and Customer’s Inspector when applicable.

8.2 These records need not be retained after completion of the project unless required by Code or contract.


CHARTER MEMBERS

ACCORD PIPE FABRICATORS, INC.

AIR CONDITIONING COMPANY, INC.

FLO-RITE, INC.

GEM INDUSTRIAL, INC. HPI CONSTRUCTION CO., INC.

IDEAL WELDERS, LTD.

IVOR J. LEE, INC.

JOHN E. GREEN COMPANY

J. F. AHERN CO.

J. H. KELLY LLC

J. S. MC KINNEY, INC.

KINETIC SYSTEMS, INC.

M & M WELDING AND FABRICATORS, INC.

MC ABEE CONSTRUCTION, INC.

MC CARL'S, INC.

MECHANICAL INCORPORATED

MID STATES PIPE FABRICATING, INC.

MURPHY COMPANY NARDE1 FABRICATORS, LTD.

NEWMECH COMPANIES, INC.

PHILLIPS, GETSCHOW COMPANY

PIPING SYSTEMS, INC.

S. A. COMUNALE COMPANY, INC. S&D / OSTERFELD MECHANICAL CONTRACTORS

SCOTT CO. O F CALIFORNIA SPECIALTY PIPING CORPORATION TEAM INDUSTRIES, INC.

W. J. O'NEIL COMPANY

Jamaica,

Glendale,

Riviera Beach,

Walbridge, Huntington,

Delta,

Masury, Highland Park,

Fond du Lac,

Longview,

Freeport,

Santa Clara,

Gaithersburg,

Tuscaloosa,

Beaver Falls,

Freeport,

EI Dorado,

St. Louis,

Calgary,

St. Paul,

Oconto Falls,

New London,

Barberton, Dayton,

San Leandro, Davisville, Kaukauna,

Livonia,

New York

California

Florida

Ohio

West Virginia

British Columbia (Canada)

Ohio

Michigan

Wisconsin

Washington

Texas California

Maryland

Alabama

Pcnnsylvania Illinois

Arkansas

Missouri

Alberta (Canada)

Minnesota

Wisconsin Wisconsin

Ohio

Ohio

California West Virginia Wisconsin

Michigan

A current index of the latest revised ES Standards, Technical Bulletins and Safety Training Guideline is available from the Pipe Fabrication Institute.

PFI Safety Training Guideline, Standards and Technical Bulletins are published to serve proven needs of the pipe fabricating industry at the design level and in actual shop operations. Hence, such needs are continually considered and reviewed by the Engineering Committee of the Pipe Fabrication Institute to provide recommended procedures, which have been demonstrated by collective experiences to fulfill requirements in a manner for Code compliance. However, as the PFI Standards are for minimum requirements the designer or fabricator always has the option of specifying supplementary conditions in the form of requirements beyond the scope of the PFI publications.


pfi-es-04 (1985)

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