ISO/TC 41/SC 3 - Conveyor belts

This document specifies a method for assessing, on a small scale, the reaction of a conveyor belt to an ignition flame source. It is applicable to conveyor belts having a textile carcass as well as steel cord conveyor belts.

This document specifies test methods for determining the electrical resistances of light conveyor belts according to ISO 21183‑1. The resistances are surface resistance, volume resistance perpendicular to the belt plane, and longitudinal and transverse volume resistance parallel to the belt plane. This document also specifies two test methods for determining the surface resistivity and the volume resistivity.

This document establishes a list of equivalent terms relating to light conveyor belts. NOTE In addition to terms used in the three official ISO languages (English, French and Russian), this document gives the equivalent terms in German, Spanish, Italian and Japanese; these are published under the responsibility of the member bodies for Germany (DIN), Spain (AENOR), Italy (UNI) and Japanese (JISC). However, only the terms given in the official languages can be considered as ISO terms.

This document specifies three methods for the measurement of total belt thickness and the thickness of covers of steel cord conveyor belts. Methods A1 and A2 (micrometer methods) can be used for all steel cord conveyor belts for the measurement of both total belt thickness and cover thickness. Method B (optical method) is intended for the measurement of cover thickness only. It is not suitable if there is a textile or metal weft, nor if the ends of the steel cords become twisted when cut.

ISO 20238:2018 specifies a method of testing to determine the propensity of a conveyor belt to generate heat flame or glow when held stationary, under a given tension, in surface contact around a rotating driven steel drum. ISO 20238:2018 describes means of varying the conveyor belt tension. NOTE For conveyor belts containing steel reinforcement, it may not be possible to conduct this test in full due to the inability of the conveyor belt to comply with the requirements of 7.2. In this case, premature termination according to 7.3 can be necessary.

ISO 433:2017 specifies the marking of conveyor belts, i.e. - the indications to be marked; - the dimensions of the marks; - the position of the marks. ISO 433:2017 does not apply to light conveyor belts as described in ISO 21183‑1.

ISO 505:2017 specifies a method of test for the measurement of the propagation resistance of an initial tear in textile conveyor belts, either in full thickness or of the carcass only. This test is intended for application to textile belts in installations where there is a risk of longitudinal tearing.

ISO 15236-3:2017 specifies the performance and constructional requirements applicable to conveyor belts for underground mining having steel cords in the longitudinal direction as reinforcement. The requirements for design and construction apply to the design of single belts, as well as the design of complete type series such as those covered in ISO 15236‑2. Steel cord belts in accordance with this document are intended for use underground in coal mines and in other applications where the highest demands for safety against fire and explosion hazards have to be complied with. NOTE At present, the requirements can only be met by the use of compounds based on chloroprene rubber for the covers, as well as for the bonding rubber.

ISO 15236-2:2017 specifies preferred types of conveyor belts with steel cords in the longitudinal direction as reinforcement. The belt type series in this document are based on the general requirements for construction given in ISO 15236‑1.

ISO 703:2017 specifies a test method for determining the transverse flexibility (troughability) of a conveyor belt, expressed as a ratio, F/L. The method is not suitable or valid for light conveyor belts as described in ISO 21183‑1.

ISO 15236-1:2016 specifies the performance and constructional requirements applicable to conveyor belts having steel cords in the longitudinal direction as reinforcement. The requirements for construction given in Clause 6 apply to the design of single belts, as well as the design of complete type series such as those covered in ISO 15236‑2.

ISO 9856:2016 specifies a method for determining the elastic and permanent elongation of a conveyor belt and the calculation of the elastic modulus. It is not applicable or valid for light conveyor belts as described in ISO 21183‑1.

ISO 283:2015 specifies a test method for the determination of the full thickness tensile strength in the longitudinal direction and the elongation at the reference force and breaking point of conveyor belts having a textile carcass. The method can also be used for the determination of full thickness tensile strength in the transverse direction and the elongation at the breaking point, for use when the manufacturer is requested by the purchaser to state values for these properties. ISO 283:2015 is not suitable or valid for light conveyor belts as described in ISO 21183‑1.

ISO 7622-2:2015 specifies a method for the determination of the tensile strength, in the longitudinal, of steel cords constituting the carcass of conveyor belts. It applies exclusively to conveyor belts with a steel carcass. NOTE A method for the determination of elongation is specified in ISO 7622‑1.

ISO 7623:2015 specifies a method for determining the bond strength of metal cords to their surrounding coating, either in the initial state or after thermal treatment. It applies exclusively to metal-carcass conveyor belts.

ISO 8094:2013 specifies a test method for determining the adhesion strength of the cover to the core layer. It applies exclusively to steel cord conveyor belts.

ISO 7622-1:2013 specifies a method for the determination of the elongation of steel cords constituting the carcass of conveyor belts, when subjected to a force corresponding to 10 % and 60 % of the specified tensile strength. It applies exclusively to conveyor belts with a steel carcass.

ISO 21179:2013 specifies a test method for the determination of the electrostatic field generated by a running light conveyor belt according to ISO 21183-1.

ISo 21181:2013 specifies a test method for the determination of the relaxed elastic modulus of light conveyor belts according to ISO 21183-1 or other conveyor belts where ISO 9856 is not applicable.

ISO 21182:2013 specifies test methods for determining the dynamic and static coefficients of friction for light conveyor belts according to ISO 21183-1.

ISO 14890:2013 specifies requirements for rubber and/or plastics covered conveyor belting of textile construction for general surface use on flat or troughed idlers. ISO 14890:2013 is not suitable or valid for light conveyor belts as described in ISO 21183-1. Items that are not requirements of ISO 14890:2013, but need to be agreed between the manufacturer and the purchaser, as well as a list of the details intended to be supplied by the purchaser of belting with an enquiry are included in the annexes.

ISO 16851:2012 specifies a method for determining the net length of an endless (spliced) conveyor belt. It applies to all types of construction of conveyor belting with the exception of belts containing steel cord reinforcement. It is not suitable or valid for light conveyor belts described in ISO 21183-1.

ISO 284:2012 specifies the maximum electrical resistance of a conveyor belt and the corresponding test method. The test is intended to ensure that the belt is sufficiently conductive to avoid the accumulation of electrical static charge which can be developed during service use. ISO 284:2012 is not suitable or applicable to light conveyor belts as described in ISO 21183-1, the static electrical properties of which are measured by ISO 21178.

ISO 15147:2012 specifies methods for the measurement of widths and lengths of cut light conveyor belts as described in ISO 21183-1 and specifies the tolerances on the dimensions.

ISO 18573:2012 specifies the temperature, humidity and time conditions used for the conditioning and testing of all types of conveyor belt, irrespective of whether they have plastics or rubber covers. It also specifies the requirements for the time interval to be observed between production and testing of conveyor belt test pieces. Special conditions applicable to a particular test or material or simulating a particular climatic environment are not included.

ISO 4195:2012 specifies requirements and test methods for the relative level of heat resistance of conveyor belt covers made of rubber. It gives the permissible variations of hardness, elongation at break and tensile strength after exposure to heat. It is applicable only to those conveyor belts having a cover thickness greater than or equal to 4 mm. It is not suitable or valid for light conveyor belts as described in ISO 21183-1.

ISO 5285:2012 gives guidelines for creating the most suitable conditions for the storage and handling of conveyor belts. It is not applicable to light conveyor belts, as described in ISO 21883-1.

This International Standard specifies the widths and lengths of conveyor belts with a textile carcass. It also specifies the corresponding tolerances. It is not applicable to light conveyor belts as described in ISO 21183-1, as tolerances on the widths and lengths of cut light conveyor belts are given in ISO 15147.

ISO 1120:2012 specifies a static test method for measuring the strength of a conveyor belt mechanical fastening; the mechanical joints can be either of the type employing a connecting rod or of a type which does not employ a connecting rod.

This International Standard specifies the formula for calculating conveyor belt transition distances and details its application and derivation. This International Standard is not suitable or valid for light conveyor belts as described in ISO 21183-1.

ISO 22721:2007 specifies requirements for rubber- or plastics-covered conveyor belting of textile construction for underground mining on flat or troughed idlers. It is not applicable to light conveyor belts as described in ISO 21183‑1. ISO 22721:2007 does not include requirements for plastics covers.

ISO 252:2007 specifies two test methods, A and B, for determining the adhesion strength between constitutive elements of a conveyor belt, i.e. between plies and between covers and carcass. Basic test conditions are in conformity with ISO 36. It is applicable to all types of construction of conveyor belting with the exception of belts containing steel cord reinforcement, and textile-reinforced belts with a full-thickness tensile strength of less than 160 N/mm. It is not suitable or valid for light conveyor belts as described in ISO 21183-1.

ISO 583:2007 specifies test methods for the determination of total belt thickness and the thickness of constitutive elements of conveyor belts having a textile carcass. The constitutive elements include the covers, the carcass and interlayers, i.e. the material between adjoining plies. It is not suitable or valid for light conveyor belts as described in ISO 21183-1.

ISO 21183-1:2005 describes the principal characteristics and applications of light conveyor belts. This description is necessary either for limiting the validity of certain standards to light conveyor belts or for excluding light conveyor belts from the validity of certain standards.

ISO 5293:2004 specifies the formula for calculating conveyor belt transition distances and details its application and derivation. ISO 5293:2004 is not suitable or valid for light conveyor belts.

ISO 15236-4:2004 specifies design, dimensions, requirements and marking of vulcanized joints for steel cord conveyor belts.

Specifies the number of samples to be taken for carrying out acceptance tests, depending on the overall length ordered by the same user. Applicable to a batch of conveyor belts having the same characteristics: quality, width, etc.

Establishes the classification of covers for general purpose conveyor belts with textile or metal carcasses. Specifies the essential combinations of principal characteristics of belt covers and states the corresponding methods of determination.

This second edition cancels and replaces the first edition (1976). Establishes a method of calculating minimum pulley diameters. Applies to belts made of rubber or plastics with textile or metal carcasses. Is not applicable to belts which have a carcass thickness of more than 20 mm or to those which have intermediate lyers of rubber or plastics of more than 0,8 mm thickness between the plies, and not applies to heat-resistant belts for hot products over 100 °C or to belts in service at temperatures under -40 °C.

This second edition cancels and replaces the first edition (1983). Contains terms in English (in American, if different), French, German, Italian, Spanish, and Russian. The terms are listed in the alphabetical order of the english language. Alphabetical indexes for each language mentioned are also included.

ISO 7622-2:2015 specifies a method for the determination of the tensile strength, in the longitudinal, of steel cords constituting the carcass of conveyor belts. It applies exclusively to conveyor belts with a steel carcass. NOTE A method for the determination of elongation is specified in ISO 7622‑1.

ISO 340:2013 specifies a method for assessing, on a small scale, the reaction of a conveyor belt to an ignition flame source. It is applicable to conveyor belts having a textile carcass as well as steel cord conveyor belts.

ISO 21178:2013 specifies test methods for determining the electrical resistances of light conveyor belts according to ISO 21183-1. The resistances are surface resistance, volume resistance perpendicular to the belt plane, and longitudinal and transverse volume resistance parallel to the belt plane. ISO 21178:2013 also specifies two test methods for determining the surface resistivity and the volume resistivity.

ISO 7590:2009 specifies three methods for the measurement of total belt thickness and the thickness of covers of steel cord conveyor belts. Methods A1 and A2 (micrometer methods) can be used for all steel cord conveyor belts for the measurement of both total belt thickness and cover thickness. Method B (optical method) is recommended for the measurement of cover thickness only. It is not suitable if there is a textile or metal weft, nor if the ends of the steel cords become twisted when cut.

This International Standard specifies requirements and test methods for the relative level of heat resistance of conveyor belt covers made of rubber. It gives the permissible variations of hardness, elongation at break and tensile strength after exposure to heat. It is applicable only to those conveyor belts having a cover thickness greater than or equal to 4 mm. It is not suitable or valid for light conveyor belts as described in ISO 21183-1[1].

ISO 15236-3:2007 specifies the performance and constructional requirements applicable to conveyor belts for underground mining having steel cords in the longitudinal direction as reinforcement. The requirements for design and construction apply to the design of single belts as well as the design of complete type series such as those covered in ISO 15236-2. Steel cord belts in accordance with ISO 15236-3:2007 are intended for use underground in coal mines and in other applications where the highest demands for safety against fire and explosion hazards have to be complied with.