UL 58-2018 UL Standard for Safety Steel Underground Tanks for Flammable and Combustible Liquids (Tenth Edition).pdf

1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 58 Steel Underground Tanks for Flammable and Combustible Liquids STANDARD FOR SAFETYUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL

2、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Steel Underground Tanks for Flammable and Combustible Liquids, UL 58 Tenth Edition, Dated January 31, 2018 Summary of Topics This New Edition of UL 58 is being issued

3、 to address the editorial maintenance of UL Standards for Safety. All rights reserved. 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 without prior permission of UL. UL

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7、ror or deviation introduced while purchaser is storing an electronic Standard on the purchasers computer system. JANUARY 31, 2018 UL 58 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL JANUARY 31, 2018 UL 58 tr2 No Text on This PageUL COPY

8、RIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL JANUARY 31, 2018 1 UL 58 Standard for Steel Underground Tanks for Flammable and Combustible Liquids The First through Third editions were titled Construction and Performance of Underground Storage Tan

9、ks. The Fourth edition was titled Underground Storage Tanks. First Edition October, 1925 Second Edition September, 1929 Third Edition February, 1937 Fourth Edition April, 1949 Fifth Edition December, 1961 Sixth Edition December, 1971 Seventh Edition October, 1976 Eighth Edition April, 1986 Ninth Edi

10、tion December, 1996 Tenth Edition January 31, 2018 The Department of Defense (DoD) has adopted UL 58 on January 21, 1992 . The publication of revised pages or a new edition of this Standard will not invalidate the DoD adoption. Comments or proposals for revisions on any part of the Standard may be s

11、ubmitted to UL at any time. Proposals should be submitted via a Proposal Request in ULs On-Line Collaborative Standards Development System (CSDS) at https:/. ULs Standards for Safety are copyrighted by UL. Neither a printed nor electronic copy of a Standard should be altered in any way. All of ULs S

12、tandards and all copyrights, ownerships, and rights regarding those Standards shall remain the sole and exclusive property of UL. COPYRIGHT 2018 UNDERWRITERS LABORATORIES INC.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL JANUARY 31, 2018 U

13、L 58 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .4 2 Units of Measurements 4 3 Components4 4 Undated References 5 5 Glossary .5 CONSTRUCTION ALL TANKS 6 Capacities and Dimensions 5 7 S

14、teel Thickness.6 7.1 General .6 7.2 Roark equation .7 7.3 Stiffeners 8 8 Lift Lugs .9 9 Materials .9 10 Shell Joints 10 11 Heads and Head Joints12 12 Pipe Connections .14 13 Manways 17 14 Striker Plates.19 15 Compartment Tanks 19 SECONDARY CONTAINMENT TANKS 16 Interstitial Monitor Access22 17 Constr

15、uction .24 18 Tank Accessories, Components, and Special Constructions25 19 Heating Coils and Hot Wells .26 PERFORMANCE 20 External Pressure Test 26 21 Lift Lugs .26 MANUFACTURING AND PRODUCTION TESTS 22 General26 MARKING 23 General27 APPENDIX A Capacity Tables JANUARY 31, 2018 UL 58 3UL COPYRIGHTED

16、MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These requirements cover horizontal atmospheric-type steel tanks intended for the storage underground of ammable and combustible liquids. 1.2 These requirements cover single wall tank

17、s, secondary containment tanks, multiple compartment single wall and multiple compartment secondary containment tanks. 1.3 The tanks covered by these requirements are intended for installation in accordance with the National Fire Protection Association Standard for the Installation of Oil-Burning Eq

18、uipment, NFPA 31, the Flammable and Combustible Liquids Code, NFPA 30, the Automotive and Marine Service Station Code, NFPA 30A, the Standard for the Installation and Use of Stationary Combustion Engines and Gas Turbines, NFPA 37, the Fire Code, NFPA 1, and the International Fire Code, published by

19、the International Code Council. 1.4 Tanks covered by these requirements are cylindrical tanks that are fabricated, inspected, and tested for leakage before shipment from the factory as completely assembled vessels. 1.5 These requirements do not apply to tanks covered by the Standard for Welded Steel

20、 Tanks for Oil Storage, API 650, nor tanks intended for use in chemical and petrochemical plants. 1.6 This Standard does not cover corrosion protection which may be required by local, state or federal authorities. Corrosion protection systems installed at the factory on carbon steel underground stor

21、age tanks are covered in the Standard for External Corrosion Protection System for Steel Underground Storage Tanks, UL 1746. 2 Units of Measurements 2.1 When a value for measurement is followed by a value in other units in parentheses, the rst stated value is the requirement. 3 Components 3.1 Except

22、 as indicated in 3.2, a component of a product covered by this standard shall comply with the requirements for that component. 3.2 A component is not required to comply with a specic requirement that: a) Involves a feature or characteristic not required in the application of the component in the pro

23、duct covered by this standard, or b) Is superseded by a requirement in this standard. 3.3 A component shall be used in accordance with its rating established for the intended conditions of use. JANUARY 31, 2018 UL 58 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WI

24、THOUT PERMISSION FROM UL 3.4 Specic components are incomplete in construction features or restricted in performance capabilities. Such components are intended for use only under limited conditions, such as certain temperatures not exceeding specied limits, and shall be used only under those specic c

25、onditions. 4 Undated References 4.1 Any undated reference to a code or standard appearing in the requirements of this standard shall be interpreted as referring to the latest edition of that code or standard. 5 Glossary 5.1 For the purpose of this standard, the following denitions apply. 5.2 TYPE I

26、TANK A primary tank wrapped by an exterior steel shell that is in direct contact with the primary tank; where, the exterior shell is wrapped from 300 to 360 degrees of the primary tank circumference. 5.3 TYPE II TANK An outer tank physically separated from the inner primary containment tank by stand

27、offs; where, the inner tank is completely contained within the outer tank. CONSTRUCTION ALL TANKS 6 Capacities and Dimensions 6.1 Capacities, dimensions, and construction details shall comply with the applicable requirements of this standard. 6.2 Tables 1 and 2 of Appendix A give capacities for cyli

28、ndrical tanks in gallons per foot of length and in liters per meter of length. For a tank with conical heads, the total capacity is obtained by adding one-third the height of the heads to the shell length. For a compartment tank, the total tank capacity is the sum of the capacity of each compartment

29、. 6.3 The total capacity of a tank shall not be: a) less than the rated nominal capacity and b) more than 105 percent of the rated nominal capacity. 6.4 The total capacity is to be determined at the level of the lowest opening when the tank is in the intended installation position. 6.5 The overall l

30、ength of a tank shall not be greater than 8 times its diameter. JANUARY 31, 2018 UL 58 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 7 Steel Thickness 7.1 General 7.1.1 Tanks shall comply with the Roark Equation or the External Pressure T

31、est described in 20.1. 7.1.2 The minimum steel shell thickness for a primary tank is 0.123 inches (3.12 mm). The minimum steel shell thickness for a secondary tank is 0.093 inches (2.36 mm). 7.1.3 The minimum head thicknesses for all tanks, except the outer head of Type I tanks, are noted in Table 7

32、.1. The minimum head thicknesses for the outer head of Type I tanks are noted in Table 7.2. 7.1.4 When the external pressure test, described in 20.1 is conducted successfully, the minimum steel thickness for the shell is reduced 25% from the calculated value using the Roark equation for the same len

33、gth and diameter tanks. Exception: Tanks with a length to diameter ratio exceeding 6 to 1 shall not have reductions in the shell thickness. Table 7.1 Tank head thickness Tank diameter, Minimum head thickness, Inches (m) Inches (mm) Up to 64 (Up to 1.62) .123 (3.12) 64.1 to 90 (1.63 to 2.28) .167 (4.

34、24) 90.1 to 126 (2.29 to 3.20) .240 (6.10) 126.1 to 144 (3.20 to 3.66) .302 (7.67) Table 7.2 Type I tank outer head thickness Tank diameter Minimum head thickness Inches (m) Inches (mm) Up to 64 (Up to 1.62) 0.123 (3.12) 64.1 to 96 (1.63 to 2.44) 0.167 (4.24) 96.1 to 144 (2.45 to 3.66) 0.240 (6.10)

35、JANUARY 31, 2018 UL 58 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 7.2 Roark equation 7.2.1 The calculated pressure from the Roark equation shall be equal to or greater than the external pressure at the bottom of the tank surrounded by

36、only water and submerged 5 feet (1.52 m) or at a depth equal to the manufacturers specied maximum burial depth, whichever is greater. The buckling pressure shall be calculated using the following equation: in which: P is buckling pressure, psi E s is modulus of elasticity of steel (29.5 x 10 6 psi f

37、or structural grade A36 carbon steel) t s is thickness of steel tank shell (inches) L is length of tank (inches) r is radius of tank (inches), and u is Poissons Ration (0.287 for structural grade A36 carbon steel) Reference: Roarks Formulas for Stress and Strain, 6th Edition, Warren Young, Table 35,

38、 Case 19b, Page 690 7.2.2 Using the Roark formula, minimum steel shell thickness (t s min ) or the maximum tank length (L max ) can be calculated using the following equations, respectively: JANUARY 31, 2018 UL 58 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHO

39、UT PERMISSION FROM UL in which: P 1 is calculated external pressure at the bottom of a submerged tank in water, psi. The water depth equals 5 feet (1.52 m) or the maximum burial depth for the tank, whichever is greater, plus the tank diameter. E s is Modulus of Elasticity of steel, (29.5 x 10 6 psi

40、for structural grade A36 carbon steel), t s is thickness of steel tank shell (inches), L is length of tank (inches), r is radius of tank (inches), and u is Poissons Ratio (0.287 for structural grade A36 carbon steel) Note Values for E s and u for other than A36 structural grade carbon steel shall be

41、 from recognized technical reference books or established by an engineering evaluation of the material. 7.2.3 The equivalent steel thickness (t eq ) for a Type I double wall steel tank is (t inner 2.5 +t outer 2.5 ) .4 . This value is substituted into Roarks Equation. 7.2.4 The steel thickness for t

42、he inner and outer walls of a Type II tank is calculated independently using Roarks Equation. 7.3 Stiffeners 7.3.1 With the addition of one stiffener to the midpoint of a tank, the tank length can be increased 25%. When two stiffeners are placed at the 1/3 and 2/3 positions of a tank, the tank lengt

43、h can be increased 40%. With reference to 6.5, the overall length of a tank shall not be greater than 8 times its diameter. Other arrangements of stiffeners shall require an engineering evaluation. The thickness for the shell shall not be less than that specied by the Roark Equation for any tank wit

44、h a length to diameter ratio exceeding 6 to 1. 7.3.2 Stiffeners shall be intermittently welded with 1 inch (25.4 mm) spots, not over 12 inches (304.8 mm) apart, and extend 360 degrees around the tank. The stiffeners shall have an opening at the top and bottom so that liquid and vapor can move past t

45、he stiffeners. 7.3.3 The required moment of inertia (I req ) of the stiffener is described below: JANUARY 31, 2018 UL 58 8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL in which: P is calculated external pressure at the bottom of a submerge

46、d tank in water. The water depth equals 5 feet (1.52 m) or the maximum burial depth for the tank, whichever is greater, plus the tank diameter. psi L is rib spacing (inches) D is outer diameter of tank (inches), and E s is modulus of steel (29.5 x 10 6 psi for structural grade A36 carbon steel) The

47、moment of inertia of the stiffener shall be veried from tables or calculations from recognized technical reference books, or the tank with stiffeners shall be subjected to the External Pressure Test, Section 20. 7.3.4 A bulkhead is to be treated as a stiffener. 7.3.5 The minimum steel thickness of a

48、 tank with stiffeners shall be in accordance with 7.1.2 and 7.1.3. 8 Lift Lugs 8.1 Lift lugs, when provided, shall comply with the load test requirements in Section 21, Lift Lugs, and the marking requirements in 23.7. 9 Materials 9.1 A tank shall be constructed of commercial or structural grade carb

49、on steel or of Type 304 or 316 stainless steel, as noted in 9.2 and 9.3. Only new material shall be used. 9.2 Carbon steel shall: a) Comply with the Specication for Carbon Structural Steel, ASTM A36-91; or Specication for Steel, Carbon (0.15 Maximum, Percent), Hot-Rolled Sheet and Strip, Commercial Quality, ASTM A569/A569M-91a; or Specication for Hot-Rolled Carbon Steel Sheet and Strip, Commercial Quality, Heavy Thickness Coils (Formerly Plate), ASTM A635/635M-92; or b) Have: 1) a carbon conten