Ul 142 pdf download

G Minimum 2 inches Minimum thickness of bolting flange after Equivalent Minimum thickness of cover plate finishing Maximum pressureb, tank height, pounds per inch inch inch inch inch inch feeta square inchc manholed manholed manholed manholed manholed manholed.

See 8. Table Minimum steel thickness, inch mm Maximum diameter, Actual capacity, U. Tank diameters exceeding inches 3. Revised When two or more pieces are used, joints shall be one of the shell joint constructions described in Figure 6. Figure Bracing for No. Added See Figure Bulkheads are not allowed in tanks over inches in diameter.

When two or more pieces are used, joints shall be in accordance with Figure 6. Diameter of Channels head, inchesa Inches Poundsb Angles, inchesa. Actual Carbon steel sheet thickness, inch mm Stainless steel sheet thickness, inch mm capacity, U. If two or. No reproduction or networking permitted without license from IHS more pieces are used, joints shall be one of the shell joint constructions described in Figure 6. Exception: Flat top roofs for vertical tanks are acceptable provided there is no leakage found during the Tank Leakage Test, Section 39, which is conducted after the Top Load Test, Section A dished head shall have a depth of dish not less than that specified in Table If two or more pieces are used, joints shall be one of the shell joint constructions described in Figure 6.

This construction is not allowed for tanks over inches in diameter. Copyright Underwriters Laboratories Inc. No reproduction or networking permitted without license from IHS Table Capacity Minimum metal thickness, inch mm Maximum diameter of U.

Unflanged flatheads shall not be used in this type of construction. No Text on This Page. Carbon steel sheet minimum thickness, inch mm Capacity, U. If supports are provided for other tank constructions, they shall comply with the requirements of Part IV of this standard. Vent openings shall be constructed to direct venting upward away from the tank. In addition, there shall be no leakage as evidenced by visual inspection of the dike. Other saddle constructions or means of support are to be evaluated by conducting structural analysis using calculationsa, or tested in accordance with Performance Tests, Section Other methods of structural analysis calculations, such as finite element, are not prohibited from being used.

Bednar is a useful reference for this purpose. Part or less 35, 35, 50, 50, 75, Maximum Tank 48 64 76 Diameter Top Flange 0. Wear plates for saddles of tanks above inch 3. There shall be no damage to or permanent deformation of the tank or supports. These materials shall comply with the requirements for Gaskets and Seals, UL Manholes shall not be less than 24 inches 0.

Hatch covers, if used, shall not be of the self-locking type if they can be opened only from the outside of the tank. Suitability shall be determined by test as described in Ladders with a length of climb of greater than 10 feet shall support a static load of pounds kg. Runways used below the top level of the tank are only required to have a guardrail on one side.

The coil or hot well connection shall exit from the tank above the liquid level, unless made of steel having a wall thickness not less than specified for that portion of the tank shell through which the connection exists.

A continuous full fillet weld shall be made where a connection pierces the tank or a manhole cover. It shall be attached to the tank using a continuous full fillet weld, inside and outside, or the equivalent. The precautions should include the use of a pressure-relief device that will reduce the risk of the tank becoming pressurized in excess of the specified test pressure.

There shall be no evidence of leakage or sign of permanent deformation following the leakage test. If subjected to a leakage test pressure, the tank wall, head, or roof may deflect but shall return to its original position and shape when the test pressure is released.

For a horizontal or rectangular tank, the test gauge pressure is to be not less than 3 psi 21 kPa or more than 5 psi 35 kPa. A continuous drop in pressure will be considered evidence of leakage. If the tank is unable to maintain the vacuum plus or minus 2 inches of mercury for the specified time, the tank shall be retested using the method described in Neither the primary containment tank nor the secondary containment shell shall rupture or leak when subjected to this test.

Piping and fittings as shown in Figure All unused openings in the tank to be tested are to be plugged. The gauge pressure is to be held for 2 minutes after each increment of a gauge pressure of 5 psi until the test gauge pressure of 25 psi kPa is attained. Exception: Test gauge pressure of 15 psi kPa may be used instead of 25 psi if tanks are marked as specified in Pressure in the primary tank is to be maintained the same as the pressure of the annular space while testing the annular space.

A Valve for expelling air from tank. B Bleeder valve should be about same size as C. G A gauge pressure of 0 50 psi 0 kPa. There shall be no permanent deformation or leakage when subjecting the tank to the Tank Leakage Test, Section, This condition is to be maintained for a minimum of one hour. The tank shall not show uplifting from the dike floor. There shall be no evidence of structural damage.

The dike is to be emptied and the reference position of the dike determined. The dike shall then be filled with water and examined for structural damage or deflection. After the dike is emptied, there shall be no structural damage or permanent deflection of the dike walls. There shall be no permanent deformation or leakage when subjecting the tank to the Tank Leakage Test, Section An evenly distributed load equal to the weight of the filled tank is to be placed across the top of the filled tank on a line parallel to the longitudinal axis of the tank.

The tank and supports shall withstand this load for 2 minutes. No reproduction or networking permitted without license from IHS 44A. Single or multiple fittings may be tested to establish a load rating for each fitting. A fitting or fittings shall be tested in a manner which simulates the worst case lifting configuration for which each fittings load rating will be determined.

Added 44A. The lift fittings and the tank shall not show evidence of damage, as defined by cracking or tearing of the lift fitting itself, of the tank wall itself, or of any metal weld attachment.

Defects in welds are to be repaired by chipping or melting out from one or both sides of the joint, as required, and rewelding. If all seams are double welded inside and outside , visual inspection may be used. The Hydrostatic Load Test, Section 43, may also be used to determine welding defects.

The mark shall be adjacent to the conformity mark. The capacity may also be expressed in terms of percent containment of the primary tank. Do Not Secure Cover.

The nameplate shall be attached by welding or brazing or by attaching it by drive screws, rivets, welding, or brazing to a bracket or holder that is then welded or brazed to the tank. Table A1 Gallon capacity per foot of length.

Diameter in U. Tank Diameter, feeta. Tank length, feeta Wetted area of tanks with flat heads, square feetb. Table A2 Continued. Table A3 Wetted areas for vertical tanks Area of shell to elevation not more than 30 feet above bottom Revised Table A3 effective December 15, No reproduction or networking permitted without license from IHS feeta Wetted area of tanks with flat heads, square feetb. UL , Ninth Edition. The requirements shown are the current requirements that have been superseded by requirements in revisions issued for this Standard.

To retain the current requirements, do not discard the following requirements until the future effective dates are reached. The interstitial annular space of a secondary containment tank This is generated text for figtxt. A vent opening shall be in addition to the fill, withdrawal, and liquid level gauge openings. A manhole attached to the shell of a vertical tank shall be as shown in Figure 9.

NOTE Bracing shall be horizontal as shown or vertical not as shown. Diameter Minimum depth Diameter Minimum depth. Part or less 35, 35, 50, Maximum Tank 48 64 76 Diameter Top Flange 0. Table A2 Wetted areas for horizontal tanks Wetted area equals 75 percent of total area Table A2 effective until December 15, Tank length, feeta Wetted area of tanks with flat heads, square feetb 44 45 46 47 48 49 Table A3 Wetted areas for vertical tanks Area of shell to elevation not more than 30 feet above bottom Table A3 effective until December 15, Tank Diameter, feeta 3 4 5 6 7 8 9 10 11 12 Tank length, feeta Wetted area of tanks with flat heads, square feetb.

Tank length, feeta Wetted area of tanks with flat heads, square feetb 10 94 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 Open navigation menu.

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Download now. Save Save UL Original Title: UL Related titles. Carousel Previous Carousel Next. Jump to Page. Search inside document. Summary of Topics Revisions to the ninth edition of UL are being published to address numerous issues that were discussed at past STP meetings. These revisions include: 1. Revision to the scope for clarification 2. Revisions to glossary terms 3. Revisions to requirements regarding capacity and dimensions 4.

Revisions to requirements regarding tank bottoms and supports 6. Revisions to requirements regarding manways 7. Revision to requirement regarding normal and emergency venting 8. Addition of a lift lug test No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form by any means, electronic, mechanical photocopying, recording, or otherwise No reproduction or networking permitted without license from IHS without prior permission of UL.

Purchasers of the electronic versions of ULs Standards for Safety agree to defend, indemnify, and hold UL harmless from and against any loss, expense, liability, damage, claim, or judgement including No reproduction or networking permitted without license from IHS reasonable attorneys fees resulting from any error or deviation introduced while purchaser is storing an electronic Standard on the purchasers computer system. The ANSI approval for this standard No reproduction or networking permitted without license from IHS does not include the cover page, transmittal pages, or the title page.

CF Shall be continuous full fillet welds. CF Continuous full fillet weld. NOTE Nos. NOTE All welds are to be full fillet welds. If two or No reproduction or networking permitted without license from IHS more pieces are used, joints shall be one of the shell joint constructions described in Figure 6. C Control valve. D Drain.

G Minimum 2t. X Not over 4 inches mm from shell. In no event will UL be liable for any special, incidental, consequential, indirect or similar damages, including loss of profits, lost savings, loss of data, or any other damages arising out of the use of or the inability to use this Standard, even if UL or an authorized UL representative has been advised of the possibility of such damage.

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New product submittals made prior to a specified future effective date will be judged under all of the requirements in this Standard including those requirements with a specified future effective date, unless the applicant specifically requests that the product be judged under the current requirements. However, if the applicant elects this option, it should be noted that compliance with all the requirements in this Standard will be required as a condition of continued Listing and Follow-Up Services after the effective date, and understanding of this should be signified in writing.

Copyright Underwriters Laboratories Inc. This Standard consists of pages dated as shown in the following checklist: Page Date tr1 — tr4. July 22, 1. April 1, Reprinted: July 22, 2, 3. July 22, 4 — April 1, 11, 12, 12A, 12B. July 22, April 1, April 1, 16, April 1, 20 — 22, 22A, 22B. April 1, 24, July 22, 26, April 1, 30, 30A, 30B. July 22, 31 — April 1, 41, 42, 42A, 42B.

July 22, 43 — April 1, 46, 46A, 46B. July 22, 47 — 50, A1, A2. April 1, A3, A4. July 22, A5. The publication of revised pages or a new edition of this standard will not invalidate the DoD adoption. Revisions of this standard will be made by issuing revised or additional pages bearing their date of issue. A UL Standard is current only if it incorporates the most recently adopted revisions, all of which are itemized on the transmittal notice that accompanies the latest set of revised requirements.

This Standard contains basic requirements for products covered by Underwriters Laboratories Inc. UL under its Follow-Up Service for this category within the limitations given below and in the Scope section of this Standard. These requirements are based upon sound engineering principles, research, records of tests and field experience, and an appreciation of the problems of manufacture, installation, and use derived from consultation with and information obtained from manufacturers, users, inspection authorities, and others having specialized experience.

They are subject to revision as further experience and investigation may show is necessary or desirable. The observance of the requirements of this Standard by a manufacturer is one of the conditions of the continued coverage of the manufacturer's product. A product which complies with the text of this Standard will not necessarily be judged to comply with the Standard if, when examined and tested, it is found to have other features which impair the level of safety contemplated by these requirements.

A product employing materials or having forms of construction differing from those detailed in the requirements of this Standard may be examined and tested according to the intent of the requirements and, if found to be substantially equivalent, may be judged to comply with the Standard.

UL, in performing its functions in accordance with its objectives, does not assume or undertake to discharge any responsibility of the manufacturer or any other party. The opinions and findings of UL represent its professional judgment given with due consideration to the necessary limitations of practical operation and state of the art at the time the Standard is processed.

UL shall not be responsible to anyone for the use of or reliance upon this Standard by anyone. UL shall not incur any obligation or liability for damages, including consequential damages, arising out of or in connection with the use, interpretation of or reliance upon this Standard. Many tests required by the Standards of UL are inherently hazardous and adequate safeguards for personnel and property shall be employed in conducting such tests.

The first stated value is the requirement. Diked aboveground tank types include: closed top dike and open top dike. Diked secondary aboveground tank types include: closed top dike and open top dike. Primary containment aboveground tank types include: horizontal cylindrical, vertical cylindrical, and rectangular. Secondary containment aboveground tank types include: horizontal cylindrical, vertical cylindrical, and rectangular. Only new material shall be used. Table 6.

CF — Shall be continuous full fillet welds. The reinforcing plates illustrated in Figure 7. Pipe connections Nos.

Pipe made from formed plate electrically butt-welded may be substituted for any of the above-mentioned pipe sections. Connections in the shell of a vertical tank shall be in accordance with specifications in Figure 7. The reinforcing plates illustrated in Figures 7. The thickness of the flange shall not be less than specified in Table 7.

Axis of connections is to be vertical. All welds shall be full fillet welds. If reinforcing plates are used, they shall be of a thickness equal to or greater than the roof thickness.

The interstitial annular space of a secondary containment tank shall have provision for emergency venting. A vent opening shall be in addition to the fill, withdrawal, and liquid level gauge openings. A weak shell-to-roof joint construction may be used for emergency venting on vertical cylindrical tank constructions in accordance with Construction, Section A value, to the nearest whole number, for wetted areas of flat-headed horizontal tanks of various diameters and lengths are included in Table A2 of Appendix A.

See 1. If tank is to be equipped with venting device or flame arrester, the vent opening is to accommodate the venting device or flame arrester sized in accordance with Column 2 of this table.

For vertical tanks on supports the bottom of the tank shall also be included in calculating the wetted surface area. For a vertical tank over 30 feet 9 m high, the first 30 feet of the shell above the bottom of the tank is included in the calculation.

Values, to the nearest whole number, for wetted areas of vertical tanks of various diameters and heights are included in Table A3 of Appendix A. Where emergency venting is provided by such manhole and cover, the tank shall include a vent opening for normal venting in accordance with the requirements in 8. The vent opening shall be in addition to the filling and withdrawal openings, and shall not be smaller than specified in Table 8.

Table 8. A manhole attached to the shell at a location below the top of the tank or to the head of a tank shall comply with Figure 9. The reinforcing plate and handles illustrated in Figure 9. A manhole attached to the shell of a vertical tank shall be as shown in Figure 9. A manhole of the type illustrated in Figure 9. G — Minimum 2t. W — Optional weep holes. Two provided. NOTE — Nos. G — Minimum 2 inches Table 9. See 8. These openings, and any additional openings in the top of the tank, shall be above the highest liquid level.

Table When two or more pieces are used, joints shall be one of the shell joint constructions described in Figure 6. Figure See Figure The depth of dish of a dished bulkhead shall not be less than that specified in Table When two or more pieces are used, joints shall be one of the constructions illustrated in Figure 6. If two or more pieces are used, joints shall be one of the shell joint constructions described in Figure 6.

Exception: Flat top roofs for vertical tanks are acceptable provided there is no leakage found during the Tank Leakage Test, Section 39, which is conducted after the Top Load Test, Section A dished head shall have a depth of dish not less than that specified in Table A vertical cylindrical tank complying with the requirements in The top shall be made of steel not more than 0. See Details 5 and 6 of Figure 6. A roof-plate joint shall be as illustrated in Detail 7 of Figure 6. Details 5, 6, and 7 of Figure 6.

The vent opening shall be in addition to the fill and withdrawal openings. The vent opening shall not be smaller than specified in Table 8. Unflanged flatheads shall not be used in this type of construction. If supports are provided for other tank constructions, they shall comply with the requirements of Part IV of this standard. Vent openings shall be constructed to direct venting upward. In addition, there shall be no leakage as evidenced by visual inspection of the dike.

Other saddle constructions or means a of support are to be evaluated by conducting structural analysis using calculations , tested in accordance with Performance Tests, Section 32, or other equivalent test method.