UL€¦ · Web viewUL142 – Standard for Steel Aboveground Tanks for Flammable & Combustible Liquids - 9th ed with revisions published July 19, 2013 and corrections issued Aug 26,

September 12, 2014

COMBINED SUMMARY OF REQUIREMENTS

The following Appendix material contains a brief summary of our assessment of new and revised requirements for similar US & Canadian Aboveground Steel Tanks Standards & CCNs identified below, which have been published within the last year. In an effort to reduce the impact of these changes for all affected Certification Marks (separate cUL, ULC and dual cULus), we have coordinated implementation of them under a combined Industry File Review (IFR) with a unified future Effective Date of July 19, 2017.

UL142 – Standard for Steel Aboveground Tanks for Flammable & Combustible Liquids - 9th ed with revisions published July 19, 2013 and corrections issued Aug 26, 2014 covered by (EEEV, -7 & -C). See Appendix A.

UL142A – Outline of Investigation for Special Purpose Steel Aboveground Tanks for Specific Flammable & Combustible Liquids - 1st Issue published March 6, 2014 covered by (EFVT, -7 & -C). See Appendix B.

ULC-S601 – Standard for Shop Fabricated Steel Aboveground Tanks for Flammable & Combustible Liquids -5th ed with revisions published May 2014 (EEEV, -7 & -C and/or EFVT, -7 & -C). See Appendix C.

Note changes that did not have any impact on currently Listed products were already effective upon publication. However, changes that may potentially have an impact on currently Listed products will require a construction and/or performance evaluation under the combined IFR to determine what is necessary for compliance with the new & revised requirements by the Effective Date.

In addition, some Certification issues directly or indirectly related to these Standards publications may also need to be address in a coordinated manner under the same combined IFR, such as revisions to Listing & Engineering Marks, Combination Labels, Follow-Up Service (FUS), Standardized Appendix Pages (SAP) and Report structure, by the same Effective Date.

Subject: 142 Page 2 of 8 September 12, 2014

APPENDIX A

UL142 SOR – July 19, 2013 Revisions & August 26 Corrections

UL142 Topics General Assessment and Impact of ChangesPipe Connections

Par 7.2, Table 7.2Figs 7.1 & 7.3

Due to similar or duplicate pipe connection details, Fig 7.3 was deleted, with applicable information transferred to Fig 7.1, and references to them in Par 7.2 revised accordingly. In addition, references to roof connection details previously in Fig 7.3 were revised to Fig 7.3 with the drawing # identified for clarification.

As these combined revisions did not change any construction requirements, they were effective upon publication, and EEEV and EFVT products will not require a review or recertification. However, we plan to issue new SAPs under the IFR, to ensure the above revised Standard references & changes are accurately reflected.

Emergency Venting

Pars 8.1.2 & 8.4Fig 8.1

The new Fig 8.1 and its’ reference in 8.1.2 was intended to show one option for correct e-venting for tank openings through the primary top & secondary side. In addition, reference to par 8.2 in par 8.4 was intended to clarify both normal & emergency venting are required.

As these combined revisions did not change any construction requirements, they were effective upon publication, and EEEV and EFVT products will not require a review or recertification. However, we plan to issue new SAPs under the IFR, to ensure the above revised Standard references & changes are accurately reflected.

WSA Calculations

Pars 8.5, 8.6 & 8.7

Revisions to clarify what external surface areas to include when calculating WSA of different tank types/shapes, including tank bottoms, along with helpful formulas & other details were issued (Par 8.5 for horizontals, Par 8.6 for verticals, Par 8.7 for rectangulars).

We believe these clarifications were applied consistently to previously Listed products, except for tank bottoms, due to uncertainty if “exposed” when installed. Therefore, although SAP ref of revised paragraphs was enforced upon publication, Procedure covered vertical & rectangular tanks in EEEV & EFVT will require revision if there is a conflict.

Larger Tank Sizes

Table 8.1 & 8.2Par 15.1.2Table 9.3

Revisions in 2007 increased tank sizes & capacities for horizontals (Tables 13.1 & 21.1 from 12’ to 13’ & 50k gal to 75k gal) and verticals (Sec 15.1 from 35’ to 50’ heights), but were incomplete with respect to many construction details, so additional revisions were published:

Tables 8.1 (e-vents) & 8.2 (n-vents) - were expanded to identify venting sizes of larger tanks of both typesPar 15.1.2 - deleted 14’ diameter limits for verticals, but…Par 15.1.3 - added a 60k gal limit for verticalsTable 9.3 - was expanded with construction details for shell manhole cover plates of verticals from 36’ to 50’

Also note, editorial revisions issued Aug 26, 2014 were published following STP agreement to attempt fixing additional requirement gaps and conflicts that may prevent practical application of increased sizes:

Table 13.3 - allows 13’ dished heads, but Tables 13.2 & 13.4 – still has a 12’ limit for heads, bulkheads & bracing.Table 15.1 - clarification of footnotes b & c shell thickness minimums for verticals above & below 25’.Table 23.1 - note the STP confirmed shell thickness for tanks >1100 gal & footnote b are valid up to 50’.

As these combined revisions fixed gaps & conflicts tin existing construction requirements, they were effective upon publication, and EEEV and EFVT products will not require a review or recertification. However, we plan to issue new SAPs under the IFR, to ensure the above revised Standard references & changes are accurately reflected.

Bottom Sumps

Sec 38.2

New & revised requirements in Sec 38 for optional tank bottom sumps specify details for maximum size, minimum thickness, allowable locations and weld types required inside & outside of the tank through the shell. Note these bottom sump requirements should not be confused with tank sumps attached to tank collars.

These requirements are new, so a review of currently Certified EEEV & EFVT products with bottom sumps is necessary, resulting in construction revisions & revised drawings for designs that don’t comply. Affected manufacturers will need to comply with the new requirements by July 19, 2017.

Mounting Brackets

Sec 38A

New requirements for optional large equipment mounting bracket intended for factory or field installation attachment to the tank were added in Sec 38A. If brackets are <= 4 sqft, minimum steel thicknesses shall apply to the construction. If > 4 sqft, performance load tests per Sec 36.3 shall apply.

These requirements are new, so a review of currently Certified EEEV & EFVT products with mounting brackets is necessary, resulting in construction revision and/or performance test for those designs that don’t comply. Affected manufacturers will need to comply with the new requirements by July 19, 2017.

Leakage Tests

Par 39.3.2

Par 45.1 & 46.1

Revisions to clarify different leakage test times required for initial certification evaluations (performance tests) and manufacturer factory tests (production tests) were issued. Performance tests in 39.3.2 require a 1 hr test time. Production tests referenced by Sec 45 & 46 allow less time per the methods used in 39.3.3.

These changes were effective upon publication and will not require a review or recertification of EEEV and EFVT products since the performance tests clarify existing requirements, and revised production tests are referenced in existing SAPs. However, plans to issue new SAPs under the combined IFR may allow other equivalent testing options.


UL142 Topics General Assessment and Impact of ChangesMarkings

48.1.1 f)

48.4.1 a)

Revisions to delete engineering marks to identify coverage of optional tank supports (48.1.1 f)) and dike top types (48.4.1 a)) were issued. However, these engineering marks are also required elements of the UL Certification Mark since they convey critical information for users & AHJs related to safety.

Therefore, although deleted from the Standard and effective upon publication with no review or recertification of EEEV and EFVT products required, this information is still required by the UL Mark, so are essentially unchanged. New SAPs issued under the combined IFR will additionally clarify this point.

Misc Revisions

Table 9.4 Manway Cover Plates

Table 13.4 Bulkhead Bracing

Par 37.1 Tank Hot Wells

Fig 40.1 Leakage Test Apparatus

Sec 45.1 & 46.1 Factory Leak Tests

The following miscellaneous revisions, clarifications or corrections were made:

Correction of a typo in Table 9.4 (Shell Manway Cover Plates) of the 36“ cover plate diameter (42 ¾ to 52 ¾ ) when transposed from the previous edition.

Correction in Table 13.4 Title (Bracing for unflanged heads and flat bulkheads) resolves conflicts between the type of tank heads covered by paragraph 13.4.4, and Table 13.4 which it references.

Revisions to Par 37.1 for optional hot wells clarified that welds are required on both the inside & outside of the tank where the connection is made through the shell.

Clarification of Fig 40.1 as a suggested test apparatus since other equivalents are allowed, and new NOTE: Cylindrical tank is shown, but other tank shapes may be used in test as required.

Revisions to production leak tests in Sec 45.1 (primary & secondary) and Sec 46.1 (diked tanks) now reference more specific Sec 39 and/or Sec 43 sub-paragraphs.

As these revisions reflect past & present certifications, they are essentially unchanged in practical application, and therefore were effective upon publication, with no review or recertification of EEEV and EFVT products required. However, we plan to issue new SAPs under the IFR, to ensure the above revised Standard references (if any) are accurately reflected.


APPENDIX B

UL142A SOR – March 6, 2014 Revisions

UL142A Topics General Assessment and Impact of ChangesSpecial Purpose Tanks

Standard & Scope

The requirements published in UL142A for Special Purpose Tanks reflect currently Listed Generator Base, Work Top, Lube Oil, Used Oil and Day Tanks, that were previously based on UL142, except for limitations in stored liquids and tank size, plus deviations in construction, performance & marking requirements applicable for the special application.

Since UL142A general reflects the large majority of currently Listed products, we anticipate almost no impact of the requirement details published. However, an IFR is necessary to verify some items, and revise the EFVT and most Reports to clearly identify construction limits, covered options and special markings to ensure continued compliance.

Emergency Venting Manways

4.3.3 Exception

The new 4.3.3 Exception does not permit emergency venting through manways, which reflects existing construction practices to no longer use them for most tank applications. These revisions also anticipate reduced use of this e-vent option by Code & Standard committees, who are questioning their effective operation in long term use.

Although venting manways were not previously prohibited for special purpose tanks, except “protected” types, the smaller sizes and unique uses of special purpose tanks make them impractical, so there should be no real impact on currently Listed products. However, we will need to review larger tank sizes to ensure compliance, and revise Reports accordingly.

Basic Construction Parameters

Sec 5 Construction

The new & revised Sec 5 construction parameters clarify capacity, dimensional & shape limitations, plus special features and covered options reflects the maximum practical sizes and typical accessories of different special purpose tanks for safe use in each intended application.

Although not all construction parameters, features & options previously had specific limitations or requirements for all tank types, the revisions establish safe boundaries which reflect existing products, so there should be no real impact on currently listed products. However, we will need to review all tank types to ensure compliance, and revise Reports accordingly.

Pump & Gauge Options

Sec 5 Construction

A new option allows coverage of pumps & gauges under the tank Listing for only Lube Oil (5.3.4), Used Oil (5.4.4) and Day Tank (5.5.4) types, since they typically are packaged with these accessories for measurement and transfer of liquids.

Since specific requirements for accessories were identified, a review of currently Listed products under the IFR is necessary to determine compliance, delete types that don’t, and revise the Reports accordingly.

Reduced Venting Options

Sec 5 Construction

A new option allows reduced emergency venting for only Work Top (5.2.2), Lube Oil (5.3.2) & Used Oil (5.4.2) tank types, since they are limited to less aggressive Class III Combustibles, with the % reduction based on capacity.

Since this is an optional construction requirement, an IFR is not necessary. Any Listee who wants to reduce emergency venting for the above tank types should submit a request to be handled through the normal Certification process.

New Liquid Class for Day Tanks Sec 5 Construction

A new option for Day Tanks now allows Class I gasoline (5.5.2) in addition to diesel fuel, fuel oil, and other Class II fuels, provided the tank has specific fuel identification and cautionary markings (see Markings).

Since this is an optional construction requirement, an IFR is not necessary. Any Listee who wants to add gasoline to Day Tank fuels should submit a request to be handled through the normal Certification process.

Engineering Markings

Sec 10 Markings

Specific wording for all existing Engineering Markings was clarified, in addition to new identification & cautionary markings for load ratings, fuel types, reduced venting and other options.

Since many markings are new or require a review to accept “equivalent” variations, a review of currently Listed products under the IFR is necessary to determine compliance, transition label stock changes, and revise the Reports accordingly.


APPENDIX C

ULC-S601 SOR – May 2014 Revisions & Pending Corrections

ULC-S601 Topics General Assessment and Impact of ChangesScope, Glossary & Revised Number Formatting

Cl 1.1 & 1.3 Intended Liquids

Cl 1.7 Generator Base Tanks

Cl 1.8 Double Bottom Tanks

Sec 3 Glossary Definitions

Certification Impact and IFR Handling

The following revisions were made to the Scope of covered tank types and intended uses, plus Glossary definitions used within the Standard. Note changes re-numbering of clauses, figures, tables, etc. to support format mandates were not intended to have any impact, except for synchronizing with SAP references, but If errors are found, contact ULC Standards.

The liquid types intended to be stored in S601 tanks was clarified in 1.1 & 1.3 as spg < = 1.0 spg flammable & combustible liquids instead of “fuels”. Note additional information on compatible liquids is found in UL Guides.

The Scope summary description of the generator assembly intended for mounting on generator base tanks was deleted to clarify this additional equipment is not covered by the Standard.

A new “double bottom” design was allowed for only utility tank types, with additional construction, performance & marking requirements. Manufacturers may submit designs for evaluation of this new double bottom utility tank option.

A “double bottom utility tank” definition was added to support the new design option, plus “secondary containment” and “interstitial space” were clarified to include double wall & integrally contained designs. See integrally contained tanks.

These Scope & Glossary changes are intended for guidance (not requirements), so were effective upon publication, and will not require a review or recertification of Listed S601 products, except “integrally contained” tanks. However, we plan to issue new SAPs under the IFR, to synchronize revised Standard references & and accurately reflect revised definitions.

General Tank Construction

4.2.1 F Carbon Equivalency

4.2.4 (A&F) Steel Acceptance

4.3.1 Weld Procedures

4.7 Gasket Compatibility


The following significant revisions were made to the Section 4 general construction requirements which are applicable to all tank types covered by the Standard. Lesser revisions to this Section are under Minor Revisions.

A new carbon equivalency option to accept alternate steel grades was added, based on the same formula currently used in similar UL Standards for steel tanks. New 4.2.1 B also added ASTM A1018 steel grades.

Revisions to specify minimum accuracy & calibration of thickness measuring equipment used for steel acceptance was added to ensure consistency in of compliance, repeatability & reproducibility.

Revisions replacing “…appropriate with written…” welding procedures for all Cl 4.4 tank joints, and added Note to qualify examples of 3rd party certifiers was intended to eliminate subjectivity and improve clarity.

Revisions to requirements for determining material compatibility of manway gaskets in Cl 4.7 was shifted from the manufacturer & certifier, to the buyer. SAPs will now require manufacturers to keep the buyer’s gasket selection.

These General Construction changes are covered by SAP references, so were effective upon publication, and will not require a review or recertification of Listed S601 products. However, we plan to issue new SAPs under the IFR, to ensure the above revised Standard requirements are appropriately enforced.

Tank (Normal & Emergency) Venting

4.6.3 & 11.1.4 (D) Vent Openings

4.6.4 Threaded Fittings

4.6.6 N & E Vent Termination

Table 2 General TankN & E Vent Sizes

Table 5 Utility TankN & E Vent Sizes


Many changes to normal & emergency venting clauses were made to clarify existing requirements, add new requirements, and delete unnecessary items as follows:

Normal vent area calculations requiring reductions for fill nozzles in old Cl 3.6.3 for tanks < = 5000 L was deleted and replaced with cautionary markings in new Cl 11.1.4 (D) not to allow tight fills or use drop tubes.

For tanks installed indoors, requirements for minimum threaded fitting types and cautionary markings to ensure proper piping and vent function were deleted.

Requirements to prevent flame impingement from normal vents was revised to specify both normal & emergency vents (tank or pipe openings) shall terminate vertically and be above the highest liquid level (95% fill).

Table 2 revisions clarify rectangular tanks are subject to Column 2 (WSA) & 5 (TVC) requirements, plus clarification of requirements for optional combined normal & emergency vents and venting devices & flame arrestors, if used.

Table 5 revisions clarify the requirements in columns 3 & 4 apply to emergency vents, and columns 5 & 6 apply to combined normal/emergency vents, plus a new column 2 for normal vent area was added.

Tank Venting changes to 4.6.3, 4.6.6, 11.1.4 & Table 5 will require a review of Listed S601 products for compliance, with potential Report revisions. Changes to 4.6.4 & Table 2 will be covered by issue of new SAPs under the IFR to ensure the above revised Standard references are appropriately enforced.


ULC-S601 Topics General Assessment and Impact of ChangesDouble Bottom Tanks

1.8 Scope & Sec 3 Glossary

5.6.2 Construction & 5.6.4 Production

Sec 11.7 Markings & Instructions


Changes to support the allowance of double bottom tanks designs for only utility tanks were added as follows: Note double bottom tanks are not allowed for any other general or special purpose tank in S601.

New 1.8 Scope adds allowance of a double bottom utility tank designs, and Sec 3 Glossary defines the basic term. Note these items do not identify specific construction features, performance requirements or use limitations. New sub-secs 5.6.2 & 5.6.4 identifies construction and production test requirements for double bottom utility tanks. Note no new performance tests were determined necessary, as they are treated like double wall tanks.

New sub-sec 11.7 identifies new engineering markings for double bottoms. In addition, a new Listing mark to identify this new containment type will be created. Also note instructions will need to specify how interstitial spaces are monitored.

Since double bottoms are a new S601 utility tank option, these requests may be handled outside the IFR process. However, new SAPs issued under the IFR will be revised to address double bottom production and inspection procedures.

Loading Test Calculation Options

7.1.5 Lift Lug Calcs

7.3 Support Calcs

8.3.4 Handling Calcs


Changes to allow PE stamped calculations as an alternative equivalent to traditional loading test methods were added as follows: Note the acceptable type(s) of calculations or formulas were not specified by the TG.

New 7.1.5 options allow alternate compliance of lift lug testing in 7.1.4 by accepting PE stamped calculations.

New 7.3 options allow alternate compliance of support testing in 7.3.1 & 7.3.3 by accepting PE stamped calculations.

New 8.3.4 options allow alternate compliance of tank handling in 8.3.2 & 8.3.3 by accepting PE stamped calculations.

Since PE calculations are new S601 compliance option, these requests may be handled outside the IFR process. However, the UL/ULC will need to review calculation methods and parameters used prior to acceptance.

Static Load & Support Load Tests

8.7.1 Gen Pad Load

8.7.3 Work Top Load

8.8.2 Gen Supports


Static Load Tests revisions in Sec 8.7 and Support Load Tests in 8.8 were intended to clarify load values and other test details for different tank types, and any supports as follows:

Per 8.7.1 – Generator Tanks @ 3X max rated generator load applied to the mounting pads;

Per 8.7.3 – Workbench Tanks @ 450 kg applied to the weakest 0.1 sqm work top area, and;

Per 8.8.2 – Generator Supports @ 1X filled tank weight plus 2X max rated generator load.

In order to verify if current Listings are in compliance with the new & revised load test and marking requirements, a review of load values applied to specific surfaces and/or supports will be necessary under the IFR.

Gen Base Tank Handling Test


For Gen Base Tanks, new & revised requirements in Sec 8.4 allow for conducting the lift lug handling test at different load options, depending on what load markings are used as follows:

2X the empty tank weight plus the marked maximum generator load in 11.2.1 D) Per 8.3.3, or

2X the empty tank weight if additionally provided with new cautionary marking 11.2.1 H) per 8.3.2

In order to verify if current Listings are in compliance with the new & revised requirements, a review of generator base tank load tests and marks will be necessary under the IFR.

Spill Containment Devices


New Tank Accessory Sec 7.5 was added to address optional spill containment devices needed in some jurisdictions for regulatory compliance. If provided, these devices must comply with:

The applicable requirements of ULC-S663, and

Must be additionally marked per 11.1.1 H).

In order to verify if current Listings are in compliance with the new & revised requirements, a review of spill container constructions (un-Listed or Listed) will be necessary under the IFR.

Utility Tank Revisions


For Utility Tanks, new & revised requirements in Sec 5.6 for venting details and 11.3.4 for special markings as follows, must be re-evaluated:

5.6.1.3.1Note added to cross-ref with column 2 of revised Table 5 for min normal vent sizes, and

11.3.4 utility tank mark (old Cl 10.3.4) allowing lower field leak test pressures was deleted.

In order to verify if current Listings are in compliance with the new & revised requirements, a review of utility tank constructions, tests and marks will be necessary under the IFR.


ULC-S601 Topics General Assessment and Impact of ChangesIntegrally Contained TanksCertification Impact and IFR Handling

Sec 6.8 - Since previous S601 editions were not clear on defining critical secondary containment characteristics between “double wall”, “integrally contained” & “contained assembly” tank designs, it is necessary under the IFR to confirm all cUL Listed integrally contained tanks comply with applicable requirements for this design type, such as interstitial venting, pressurized leakage and hydrostatic tests, and engineering/listing markings.

Saddles & Support Structures Certification Impact and IFR Handling

Sec 7.3 - Since previous S601 editions were not clear on defining if tank stabilizers were or were not tank supports, revisions have clarified they are, so will be subject to either an engineering analysis per 7.3 or load testing per 8.8. Therefore, it will be necessary under the IFR to evaluate all horizontal cylindrical tanks with stabilizers for structural integrity. However, the test requirements do not evaluate horizontal forces (wind or impacts), so the Listing does not include “roll” resistance.

Marking Revisions & Dual Language


Below are engineering marking changes for all general tanks and special tank types or shapes, in addition to a new requirement for dual language marks (please see separate ULC bulletin on dual language marks):

New Sec 11 “Note” requires some markings in both English & French for some Canadian Authorities, but only “safety critical” warnings [11.2.1 (B) &(E)] must be verbatim translations.

11.1.1 nominal liquid capacity (C) and minimum n & e venting capacity (G) for each primary and each compartment in a multi-compartment tank;

11.1.4 clarification of mark location adjacent to fittings for specific openings of n-vents (B) & e-vents (C), weight ratings in A) apply to all generator tanks, and new caution mark (D) for combined vents per 4.6.3.

11.2.1 generator tank mark revisions clarify load rating location (D), fuel ignition warning (E), assembly instructions (F), and adds new lifting info that ratings exclude generator (H) for lift test exception in 8.3.2.

11.3.4 utility tank mark (old Cl 10.3.4) requiring a max field leak test pressure of 21 kPa, was deleted (if a lower hydrostatic test pressure per the 8.1.1.2 exception was applied).

11.4.2 secondary tank mark (old Cl 10.4.2) requiring a cautionary marking (B) for attached dispensers was deleted, since the Standard does not cover factory attached dispensers.

Marking revisions will be implemented when revised SAPS are issued. However, utility tanks will require retesting @ higher pressures under an IFR. In addition, we recommended submitting re-designed labels for approval before re-ordering.

Miscellaneous Minor Changes


Below are miscellaneous changes including clarifications or addition of existing certification practices and re-located or deleted requirements:

4.1.2 4.0 m diam limit for cylindrical tanks is default for deletion of old 4.10.3 1.5 m diam limit for utility tanks. Fig 1 joints S1.2 & S1.3 added as butt-weld examples, and weld penetration details in old 3.3.3 moved to new 4.4.4 4.5.2 clarification of minimum NPS Class 150 connection rating from 68 kg to 1035 kPa. 4.5.6 clarification Note added to specify manways are not connections. 4.6.1 clarification added to specify vent requirements are for openings instead of devices. Reference to e-vent size in old 3.6.7 Table 2 ref was deleted since covered by new 6.1 & 6.6. Rectangular WSA calcs in old 3.6.8 was moved to new 5.5.1.5. Testing of non-conforming lift lugs (Fig 14) in old 3.8.2 was moved to new 7.1.4. Details of horiz cylind bulkheads & head/shell thk + flange depth in old 4.2.2 & .3 moved to new 5.2.2.4 & 5.2.2.5. Details of vertical cylindrical shell, bottom & roof thicknesses in old 4.5.2 were moved to new 5.4.2.1. Details of vertical cylindrical shell joints & tank bottoms in old 4.6.2 & 4.6.3 were moved to new 5.4.2.3 & 5.4.2.4. Currently enforced compartment requirements from old 4.1.4 for rectangular tanks was added to new 5.5.1.5. 5.5.2.2.1clarification reflects existing practice to load test all workbench and generator tanks per Sec 8.7. 5.5.2.4.1 clarification reflects existing practice to evaluate all lift lugs when provided per Sec 7.1 or Sec 8.4. 5.6.1.2.2 clarification reflects existing enforcement of multi-compartment requirements for utility tanks. 6.3.1.3 clarification reflects existing practice for minimum secondary coverage of a double wall tank. 6.4.4 clarification reflects existing practice for e-vent termination details and reinforces new requirements in 4.6.5. Details of double wall vacuum monitors in old 5.9 were moved to new 6.7.1, and reinforces 6.6 & 9.2. 6.8.2.1 reinforcement of Table 2 required interstitial venting and new reduced/combined vent options. 7.1.4 clarification (old 5.7.2.1) reflects existing practice for lift lugs to be designed per Fig 14, or be tested per 8.4. Reference in old 6.6 to old Sec 9 Installation Instructions was deleted since redundant. 8.1 “proof of design” test is equivalent to old 7.3 “hydrostatic pressure” test (change in terminology). 8.1.1.1 & 8.1.1.4 clarifications reflect existing practice to proof test only rectangular tanks to “no leakage” criteria. 8.3.1 & 8.3.2 clarifications reflect existing practice to apply tests to tank assemblies & special marks to gen tanks. 8.5 clarification of Title reflects existing practice of applying the drop test to only utility tanks. Table 7 revisions reduce the min thickness for secondary shell of tanks <= 1kL from 2.5 to 2.0 mm.

These miscellaneous changes were determined not to have an impact, so will not require a review or recertification of Listed S601 products. However, we plan to issue new SAPs under the IFR, to ensure these changes are accurately reflected.


ULC-S601 Topics General Assessment and Impact of ChangesRe-numbering and Other Errors Found


In preparation of this Summary of Requirements, our technical & certification staff has discovered many errors in the new S601 5th ed, which we believe was an unintended consequence of paragraph, table & figure re-numbering caused by ULC Standards format changes. We have requested ULC Standards confirm the item below were never intended as revisions, and issues a correction as soon as possible to prevent subsequent errors by designers, manufacturers, certifiers and other users of the Standard. If any other errors are found, please bring them to the attention of ULC Standards.

CLAUSES

1.1 Note & Sec 2 Publications - ULC-S652 Standard title is incorrect 1.5 - Reference to Sec 4 & 5 should be Sec 5 & 6, respectively; 4.2.1 - Reference to A-D & E should be A-E & F respectively; 5.1.4 - Reference to 8.8 should be 8.7; 5.4.2.4 - Reference to Joint S1.1should be Joint S1.2; 11.5.1 B - Dash “–“ is missing between “MONITOR” and “DO NOT”.

TABLES & FIGURES

Table 5 Title is missing “AND” between “NORMAL” and “EMERGENCY”, and missing values in Column 6; Fig 1- VERT CYL Joints S1.4, S1.5 & S1.6 ref to Note “A” for should be “a”, and ref to 4.6.2 should be 5.4.2.3; Fig 1- HORZ CYL Joint S1.5 is missing “90° OF TOP C.L. ON”, and ref to 4.3.2 should be 5.2.2.2; Fig 6 Pg 40 - Design #s 6.2, 6.3 & 6.5 are missing “mm” after “6” & “75”, and “1” before “ts” in NOTES should be deleted. Fig 6 Pg 41 - PIPIE SIZE OD Colum is missing footnote “a” ref for 114.3, 141.3, 168.3, 218.1 & 273.0 values. Fig 6 Pg 42 - Delete “1” before “t” in Note 1 and Design ref 6.5 should be 6.6 in Note 3 Fig 6 Pg 44 - Table missing footnotes ref in headers for Colum 1(“b” after “SIZE”) and Column 4 (“a” after “PLATE”) Fig 6 Pg 44 - Table Row for “141.3 (5)” pipe size has the “7.11 (STD)” neck thk for the “168.3 (6)” pipe size. Fig 6 Pg 44 - Error above displaces correct neck thk for “219.1 (8)” & “273.0 (10)” & REINFORCING “L”, mm Column. Fig 6 Pg 44 - Table should extend separating lines between Column 3 and 4 headers. Fig 8 - Design #s 7.1 & 7.2 should be 8.1 & 8.2, and missing “a” & “c” subscripts in Table & “a” after “SIZE” in Column 4. Fig 8 - Unsure if separate Columns in ANGLE SIZE are missing header details since separated by “or” below it. Fig 9 - Reference to FIG 12 should be FIG 10 Fig 13 - Rreference to Table 7 should be Table 8, plus missing “mm” between “50” and “MAX” and a NOTE for “Ts”; Fig 14 - Missing space in “Figure 15for” and superscript ”*” in front of “FILLET”. Fig 15 - Top 2 drawing should replace “OR” with “OF”, and supporting Note from ‘07 ed pg 55 is missing; Fig 17- Delete “S” in word “TANKS” under STEP 2.

APPENDIX PAGES

A1.2 - “V2” in equation should be “V2”, and is also incorrect in the same equation on page 63; A1.4 - Temperatures shown should be “-37.2°C” and “-28.9°C” (the negative sign is missing); Table A1 - “D” missing in “WIND” on table title; Table A2 - Column 6 “4” after “ALLOWABLE” should be a superscript; B1.1 - 1st Table is missing # & title, so not sure if item C & Note ref to Table 5 should be the one on pg 65?; B1.1 - 2nd Table is missing # & title, and belongs under Fig B1B on pg 67, and Note 2 “clear” should be “clearance”; Fig B1.1- Both designs are missing #s, but assume are “Manway Design 9.1 & 9.2” from 2nd Table on pg 66?; Fig B1.2 - Appears right side of figure is missing, plus Table & Notes missing from ’07 ed for same Fig?; Fig B1.3 - Appears Table & Notes missing from ’07 ed for same Fig?.

We are operating under the assumption that all the above items are errors that will be corrected in a timely manner by ULC Standards, and are not revisions, which would require a review, recertification and retesting of all currently Listed S601 products under an IFR. Note that Appendix pages are informative, and not requirements. However, if ULC Standards identifies any items as revisions instead of errors, we will assess the impact within the IFR as it progresses.

Documents

UL€¦ · Web viewUL142 – Standard for Steel Aboveground Tanks for Flammable & Combustible Liquids - 9th ed with revisions published July 19, 2013 and corrections issued Aug 26,