1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 331B Strainers for Diesel Fuel, Biodiesel Fuel, Diesel/Biodiesel Blends with Nominal Biodiesel Concentrations up to 20 Percent (B20), Kerosene, and Fuel OilUL COPYRIGHTED MATERIAL NOT AUTHOR
2、IZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Strainers for Diesel Fuel, Biodiesel Fuel, Diesel/Biodiesel Blends with Nominal Biodiesel Conc
3、entrations up to 20 Percent (B20), Kerosene, and Fuel Oil, UL 331B First Edition, Dated February 5, 2015 Summary of Topics This is the rst edition of the Standard for Strainers for Diesel Fuel, Biodiesel Fuel, Diesel/ Biodiesel Blends with Nominal Biodiesel Concentrations up to 20 Percent (B20), Ker
4、osene, and Fuel Oil, ANSI/UL 331B. The requirements are substantially in accordance with Proposal(s) on this subject dated October 17, 2014. 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, mechanic
5、al photocopying, recording, or otherwise without prior permission of UL. UL provides this Standard as is without warranty of any kind, either expressed or implied, including but not limited to, the implied warranties of merchantability or tness for any purpose. In no event will UL be liable for any
6、special, incidental, consequential, indirect or similar damages, including loss of prots, 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
7、. In no event shall ULs liability for any damage ever exceed the price paid for this Standard, regardless of the form of the claim. Users 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, cla
8、im, or judgment (including reasonable attorneys fees) resulting from any error or deviation introduced while purchaser is storing an electronic Standard on the purchasers computer system. The requirements in this Standard are now in effect, except for those paragraphs, sections, tables, gures, and/o
9、r other elements of the Standard having future effective dates as indicated in the note following the affected item. The prior text for requirements that have been revised and that have a future effective date are located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS notice. FEBR
10、UARY 5, 2015 UL 331B tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL FEBRUARY 5, 2015 UL 331B tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL February 5, 2
11、015 1 UL 331B Strainers for Diesel Fuel, Biodiesel Fuel, Diesel/Biodiesel Blends with Nominal Biodiesel Concentrations up to 20 Percent (B20), Kerosene, and Fuel Oil Prior to the rst edition, the requirements for the products covered by this standard were included in the Outline of Investigation for
12、 Strainers for Diesel Fuel, Biodiesel Fuel, Diesel/Biodiesel Blends with Nominal Biodiesel Concentrations up to 20 Percent (B20), Kerosene, and Fuel Oil, UL 331B. First Edition February 5, 2015 This ANSI/UL Standard for Safety consists of the First Edition. The most recent designation of ANSI/UL 331
13、B as an American National Standard (ANSI) occurred on February 5, 2015. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, Title Page, or effective date information. Comments or proposals for revisions on any part of the Standard may be submitted to UL at any time. Prop
14、osals should be submitted via a Proposal Request in ULs On-Line Collaborative Standards Development System (CSDS) at http:/. 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 Standards and all copyrights, owne
15、rships, and rights regarding those Standards shall remain the sole and exclusive property of UL. COPYRIGHT 2015 UNDERWRITERS LABORATORIES INC. ANSI/UL 331B-2015UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL FEBRUARY 5, 2015 UL 331B 2 No Tex
16、t on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .5 2 Components 6 3 Units of Measurement .6 4 Undated References 6 CONSTRUCTION 5 General 6 6 Materials .7 6.1 Metallic materials .7 6.2 Nonmetallic
17、materials .8 6.3 Casting impregnation materials 10 7 Bodies and Covers .10 8 Stuffing Boxes .11 9 Springs .12 PERFORMANCE 10 General 12 11 Long Term Exposure Test .13 11.1 General .13 11.2 Samples 13 11.3 Method .13 11.4 Results .14 12 Deformation and External-Leakage Test .14 13 Hydrostatic-Strengt
18、h Test 16 14 Element-Collapse Test 16 15 10-Day Moist Ammonia-Air Stress Cracking Test .16 MANUFACTURING AND PRODUCTION 16 General 17 MARKING 17 General 17 SUPPLEMENT SA - Test Fluids SA1 Representative Aggressive Combustible Test Fuel Mixtures SA1 FEBRUARY 5, 2015 UL 331B 3UL COPYRIGHTED MATERIAL N
19、OT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL SUPPLEMENT SB - Strainers for Oil-Fired Heating Appliances SB1 Scope SB1 SB2 Capacity SB1 SB3 Non-Metallic Materials SB5 SB4 Pressure Drop Test SB6 SB5 Clogging Test .SB8 SB6 Markings SB11 FEBRUARY 5, 2015 UL 331B 4UL
20、COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These requirements cover complete, self-contained strainer or lter assemblies intended for use with the fuels designated in 1.2. Although these devices are designated stra
21、iners, they may be either strainers or lters according to the common terminology of the industry. 1.2 Strainers and lter assemblies covered by these requirements are intended for use with one or more of the following: a) Diesel fuel and diesel/biodiesel blends with nominal biodiesel concentrations u
22、p to 5 percent (B0 B5) formulated in accordance with the Standard Specication for Diesel Fuel Oils, ANSI/ ASTM D975; b) Diesel/biodiesel blends with nominal biodiesel concentrations from 5 percent up to 20 percent (B6 B20) formulated in accordance with the Standard Specication for Diesel Fuel Oil, B
23、iodiesel Blends (B6 B20), ANSI/ASTM D7467; c) Biodiesel (B99.9/B100) formulated in accordance with the Standard Specication for Biodiesel Fuel Blend Stock (B100) for Middle Distillate Fuels, ANSI/ASTM D6751; d) Kerosene formulated in accordance with the Standard Specication for Kerosine, ANSI/ ASTM
24、D3699; e) Fuel oil (heating oil) formulated in accordance with the Standard Specication for Fuel Oils, ANSI/ASTM D396. 1.3 These requirements do not cover the following: a) Strainers for handling liquids under cryogenic conditions; b) Straniers for marine use; c) Strainers for automotive fuel lines;
25、 d) Strainers for handling refrigerants; e) Strainers for use in such facilities as chemical, petrochemical, petroleum, and utility power plants; f) Strainers for use in uid-power (hydraulic and pneumatic) applications; g) Strainers or lter assemblies for use with gasoline or gasoline/ethanol blends
26、, which are covered under the Outline of Investigation for Strainers for Gasoline and Gasoline/Ethanol Blends with Nominal Ethanol Concentrations Up to 85 Percent (E0 E85), UL 331A h) Strainers or lter assemblies for use with LP-Gas, Natural Gas, Manufactured Gas, and Anhydrous Ammonia, which are co
27、vered under the Standard for Strainers for Flammable Fluids and Anhydrous Ammonia, UL 331. FEBRUARY 5, 2015 UL 331B 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 2 Components 2.1 Except as indicated in 2.2, a component of a product covere
28、d by this standard shall comply with the requirements for that component. 2.2 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 product covered by this standard, or b) Is superseded by
29、 a requirement in this standard. 2.3 A component shall be used in accordance with its rating established for the intended conditions of use. 2.4 Specic components are incomplete in construction features or restricted in performance capabilities. Such components are intended for use only under limite
30、d conditions, such as certain temperatures not exceeding specied limits, and shall be used only under those specic conditions. 3 Units of Measurement 3.1 If a value for measurement is followed by a value in other units in parentheses, the rst stated value is the requirement. 4 Undated References 4.1
31、 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. CONSTRUCTION 5 General 5.1 A strainer shall include all of the components necessary for its intended function and installation
32、, and shall be furnished as a complete assembly. Strainers may be one of two types: a) Removable assemblies, or b) Non-removable assemblies with removable strainer elements. In this standard, the term strainer applies to both types, and requirements that apply to a specic type will designate that ty
33、pe in the text of the requirement. 5.2 The construction of a strainer shall be such that parts can be reassembled in the intended manner after being dismantled to the extent needed for servicing. FEBRUARY 5, 2015 UL 331B 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTIO
34、N WITHOUT PERMISSION FROM UL 5.3 A strainer shall be constructed so that, when in its intended operating position, any air trapped within will not reduce the rate of liquid ow or the effective strainer element capacity. 5.4 A non-removable strainer employing a strainer element intended to be cleaned
35、 or replaced shall permit the removal of the element without disconnecting piping. 5.5 A strainer element shall be constructed so that joints or seals required to prevent uid bypass of the element will be maintained. 5.6 A non-removable strainer shall be constructed so that when the screen or lter e
36、lement is removed for cleaning, all foreign matter (sediment and dirt) will be removed or can be removed without the probability of any foreign matter being deposited in the outlet side of the strainer. 6 Materials 6.1 Metallic materials 6.1.1 General 6.1.1.1 A metallic part, in contact with the fue
37、ls anticipated by these requirements, shall be resistant to the action of the fuel if degradation of the material will result in leakage of the fuel or if it will impair the function of the device. For non-removable strainer assemblies for all fuel ratings covered by this standard, see the Long Term
38、 Exposure Test, Section 11. For removable strainer assemblies, the Long Term Exposure Test does not apply. 6.1.1.2 The exposed surfaces of metallic parts shall be resistant to atmospheric corrosion if this corrosion will lead to leakage of the uid or if it will impair the function of the device. The
39、 material shall comply with the requirements in Atmospheric corrosion, 6.1.2. 6.1.1.3 Metallic parts in contact with the fuels anticipated by these requirements shall not be constructed of lead, or materials that are substantially lead. In addition, no coatings or platings containing lead shall be u
40、sed, such as terne-plated steel. 6.1.1.4 With reference to the above requirements, metallic parts including metallic materials used to form uid conning parts as well as metallic coatings, or plating that may be applied to a base material. FEBRUARY 5, 2015 UL 331B 7UL COPYRIGHTED MATERIAL NOT AUTHORI
41、ZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 6.1.2 Atmospheric corrosion 6.1.2.1 Metallic material used for uid conning parts shall be resistant to atmospheric corrosion. Ferrous materials of the thickness specied in the following items are acceptable for the preceding whe
42、n uncoated: a) A casting having a wall thickness of not less than inch (6.4 mm) if shown by production test to be free of leakage, and b) Fabricated sheet steel parts having a minimum wall thickness of 0.093 inches (2.36 mm). 6.1.2.2 A protective coating shall provide resistance against atmospheric
43、corrosion to a degree not less than that provided by the protective coatings specied in 6.1.2.3. 6.1.2.3 Cadmium plating shall not be less than 0.0003 inch (0.008 mm) thick, and zinc plating shall not be less than 0.0005 inch (0.013 mm) thick, except on parts where threads constitute the major porti
44、on of the area, in which case the cadmium or zinc plating shall not be less than 0.00015 inch (0.0038 mm) thick. Metallic parts are also considered to comply with 6.1.2.1 when they are protected against atmospheric corrosion by: a) Hot dipped, mill galvanized sheet steel complying with the coating d
45、esignation G90 in Table I of the Specication for Sheet Steel, Zinc Coated (Galvanized) or Zinc-Iron-Alloy Coated (Galvannealed) by the Hot Dip Process, ASTM A653/A653M, or b) Coatings which have been determined to be equivalent to G90 under the requirements of the Standard for Organic Coatings for S
46、teel Enclosures for Outdoor Use Electrical Equipment, UL 1332. 6.1.2.4 A metallic material other than as described in 6.1.2.1 6.1.2.3 shall be painted or protected in a manner that has been determined to be equivalent. 6.2 Nonmetallic materials 6.2.1 General 6.2.1.1 A nonmetallic part in contact wit
47、h the fuels anticipated by these requirements, shall be resistant to the action of the fuel if degradation of the material will result in leakage of the fuel, or if it will impair the function of the device. 6.2.1.2 Gaskets or seals shall comply with the requirements as outlined in Nonmetallic mater
48、ials material level, 6.2.2, and Nonmetallic materials system level, 6.2.3. 6.2.1.3 Nonmetallic materials in contact with the fuels anticipated by these requirements shall not be constructed of the following: a) Polysulde rubber; b) Ethylene propylene diene monomer (EPDM) rubber; c) Methyl-Methacryla
49、te; d) Polyvinyl Chloride (PVC); e) Nylon 6/6; or FEBRUARY 5, 2015 UL 331B 8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL f) Polyurethane. 6.2.2 Nonmetallic materials material level 6.2.2.1 Seals shall be evaluated in accordance with the Standard for Gaskets and Seals, UL 157, modied as indicated in 6.2.2.2 6.2.2.4. If a specic material complies with these requirements, the material can be considered to be qualied for sys
