SIST EN 12881-1:2014
(Main)Conveyor belts - Fire simulation flammability testing - Part 1: Propane burner tests
Conveyor belts - Fire simulation flammability testing - Part 1: Propane burner tests
EN 12881-1 describes four methods for measuring the propagation of a flame along a conveyor belt which has been exposed to a relatively high localized heat source such as a fire. The damage suffered by the conveyor belt, as well as its tendency to support combustion, is measured by observing the extent to which the fire spreads along the test piece.
Method A uses a test piece 2 m in length and consumes propane gas through the burner at the rate of (1,30 ± 0,05) kg per 10 min.
Method B uses a test piece 2,5 m in length and consumes propane gas through two burners mounted above and below the test piece trestle at the rate of (1,30 ± 0,05) kg per 10 min for each burner.
Method C uses a test piece 1,5 m in length and consumes propane gas through the burner at the rate of (565 ± 10) g per 50 min.
Method D uses a test piece 1,2 m in length and consumes propane gas through the burner at the rate of
150 l/hr (D1) or 190 l/hr (D2).
Fördergurte - Brandtechnische Prüfungen - Teil 1: Prüfungen mit dem Propanbrenner
Dieser Teil der EN 12881 legt drei Verfahren zur Bestimmung der Ausbreitung einer Flamme entlang eines Fördergurtes fest, der einer örtlichen Wärmequelle, wie Feuer, ausgesetzt war. Es wird sowohl die Beschädigung des Fördergurtes gemessen als auch seine Neigung, die Verbrennung zu unterstützen, wobei das Fortschreiten der Flamme entlang des Probekörpers beobachtet wird.
Für Verfahren A wird ein 2 m langer Probekörper verwendet, wobei der Propangasverbrauch des Brenners (1,30 ± 0,05) kg in 10 min beträgt.
Für Verfahren B wird ein 1,5 m langer Probekörper verwendet, wobei der Propangasverbrauch des Brenners (565 ± 10) g in 50 min für jeden Brenner beträgt.
Für Verfahren C wird ein 1,2 m langer Probekörper verwendet, wobei der Propangasverbrauch des Brenners 150 l je h (D1) oder 190 l je h (D2) beträgt.
Courroies transporteuses - Essais de simulation d'inflammation - Partie 1: Essais avec brûleur propane
L’EN 12881 1 décrit quatre méthodes de mesurage de la propagation d’une flamme sur une courroie transporteuse qui a été exposée à une source de chaleur localisée relativement élevée, comme par exemple un feu. La détérioration de la courroie transporteuse est mesurée, ainsi que sa tendance à entretenir la combustion, en observant le degré de propagation du feu sur l’éprouvette.
La méthode A utilise une éprouvette de 2 m de long et consomme du gaz propane à l’aide du brûleur, avec un débit de (1,30 0,05) kg par 10 min.
La méthode B utilise une éprouvette de 2,5 m de long et consomme du gaz propane à l’aide de deux brûleurs montés au-dessus et en-dessous du tréteau de l’éprouvette, avec un débit de (1,30 0,05) Kg par 10 min pour chaque brûleur.
La méthode C utilise une éprouvette de 1,5 m de long et consomme du gaz propane à l’aide du brûleur, avec un débit de (565 10) g par 50 min.
La méthode D utilise une éprouvette de 1,2 m de long et consomme du gaz propane à l’aide du brûleur, avec un débit de 150 l/h (D1) ou 190 l/h (D2).
Naprave za kontinuirni transport - Trakovi tračnih transporterjev - Požarnovarnostni preskusi - 1. del: Preskusi s propanskim gorilnikom
Standard EN 12881-1 opisuje štiri metode za merjenje širjenja ognja po traku tračnega transporterja, ki je bil izpostavljen razmeroma visoki koncentraciji lokaliziranega toplotnega vira, kot je ogenj. Tako škoda, ki jo utrpi trak tračnega transporterja, kot tudi težnja k zgorevanju se meri z opazovanjem tega, v kakšnem obsegu se ogenj razširi po preskušancu. Metoda A uporablja preskušanec z dolžino 2 m in propan skozi gorilnik porablja s hitrostjo (1,30 ± 0,05) kg na 10 minut. Metoda B uporablja preskušanec z dolžino 2,5 m in propan skozi dva gorilnika, nameščena nad in pod oporo preskušanca, porablja s hitrostjo (1,30 ± 0,05) kg na 10 minut za posamezni gorilnik. Metoda C uporablja preskušanec z dolžino 1,5 m in propan skozi gorilnik porablja s hitrostjo (565 ± 10) g na 50 minut. Metoda D uporablja preskušanec z dolžino 1,2 m in propan skozi gorilnik porablja s hitrostjo 150 l/uro (D1) ali 190 l/uro (D2).
General Information
- Status
- Published
- Public Enquiry End Date
- 30-Jun-2012
- Publication Date
- 08-Jun-2014
- Technical Committee
- DTN - Lift and transport appliances
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 29-May-2014
- Due Date
- 03-Aug-2014
- Completion Date
- 09-Jun-2014
- Directive
- 98/37/EC - Machinery
Relations
- Effective Date
- 01-Jul-2014
Overview
EN 12881-1:2014 - Conveyor belts - Fire simulation flammability testing - Part 1: Propane burner tests is a CEN standard that specifies laboratory methods to assess how a conveyor belt behaves when exposed to a localized high heat source. The standard measures flame propagation and the extent of damage along test pieces to evaluate a belt’s tendency to support combustion under simulated fire conditions.
Key topics and technical requirements
- Four defined test methods that simulate different fire exposure scenarios:
- Method A (Two‑metre single burner): 2.0 m test piece; propane consumption (1.30 ± 0.05) kg per 10 min.
- Method B (Double burner): 2.5 m test piece; two burners (above and below) each consuming (1.30 ± 0.05) kg per 10 min.
- Method C (Mid‑scale fire propagation): 1.5 m test piece; propane consumption (565 ± 10) g per 50 min.
- Method D (Laboratory‑scale fire propagation): 1.2 m test piece; propane flow 150 l/h (D1) or 190 l/h (D2).
- Apparatus and setup requirements: e.g., test gallery dimensions, trestle construction, burner geometry and jet spacing, air velocity measurement (Method A specifies an average air velocity of 1.5 ± 0.1 m/s at 350 mm height), thermocouple placement and gas supply details (propane complying with ISO 9162).
- Test conduct and reporting: preparation of test pieces, ambient temperature limits, number of tests (both sides of belt typically tested), termination criteria, measurement of damage and formal test reporting.
- Safety considerations: the standard highlights production of large amounts of smoke and heat and recommends cautious operation with adequate supervision.
Practical applications
- Provides reproducible laboratory methods to:
- Assess fire propagation risk for conveyor belting used in mining, bulk handling, ports, aggregates and material‑handling industries.
- Support selection and specification of belts with reduced flammability for high‑risk installations.
- Provide manufacturers and testing laboratories with standardized procedures for product certification, quality control and comparative performance evaluation.
Who uses this standard
- Conveyor manufacturers and belting suppliers
- Independent testing laboratories and notified bodies
- Safety and fire engineers specifying belt systems for industrial installations
- Procurement teams and compliance officers in mining, quarrying, cement, ports and bulk‑handling sectors
Related standards
Normative references cited in EN 12881-1:2014 include:
- EN 10088-3 (stainless steels technical delivery conditions)
- EN 22768-1 (general tolerances ISO 2768-1)
- ISO 65 (carbon steel tubes)
- ISO 9162 (liquefied petroleum gases - specifications)
Keywords: EN 12881-1:2014, conveyor belts, fire simulation, flammability testing, propane burner tests, fire propagation, testing methods, Method A B C D.
Frequently Asked Questions
SIST EN 12881-1:2014 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Conveyor belts - Fire simulation flammability testing - Part 1: Propane burner tests". This standard covers: EN 12881-1 describes four methods for measuring the propagation of a flame along a conveyor belt which has been exposed to a relatively high localized heat source such as a fire. The damage suffered by the conveyor belt, as well as its tendency to support combustion, is measured by observing the extent to which the fire spreads along the test piece. Method A uses a test piece 2 m in length and consumes propane gas through the burner at the rate of (1,30 ± 0,05) kg per 10 min. Method B uses a test piece 2,5 m in length and consumes propane gas through two burners mounted above and below the test piece trestle at the rate of (1,30 ± 0,05) kg per 10 min for each burner. Method C uses a test piece 1,5 m in length and consumes propane gas through the burner at the rate of (565 ± 10) g per 50 min. Method D uses a test piece 1,2 m in length and consumes propane gas through the burner at the rate of 150 l/hr (D1) or 190 l/hr (D2).
EN 12881-1 describes four methods for measuring the propagation of a flame along a conveyor belt which has been exposed to a relatively high localized heat source such as a fire. The damage suffered by the conveyor belt, as well as its tendency to support combustion, is measured by observing the extent to which the fire spreads along the test piece. Method A uses a test piece 2 m in length and consumes propane gas through the burner at the rate of (1,30 ± 0,05) kg per 10 min. Method B uses a test piece 2,5 m in length and consumes propane gas through two burners mounted above and below the test piece trestle at the rate of (1,30 ± 0,05) kg per 10 min for each burner. Method C uses a test piece 1,5 m in length and consumes propane gas through the burner at the rate of (565 ± 10) g per 50 min. Method D uses a test piece 1,2 m in length and consumes propane gas through the burner at the rate of 150 l/hr (D1) or 190 l/hr (D2).
SIST EN 12881-1:2014 is classified under the following ICS (International Classification for Standards) categories: 13.220.40 - Ignitability and burning behaviour of materials and products; 53.040.20 - Components for conveyors. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 12881-1:2014 has the following relationships with other standards: It is inter standard links to SIST EN 12881-1:2006+A1:2008. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
SIST EN 12881-1:2014 is associated with the following European legislation: EU Directives/Regulations: 2006/42/EC, 98/37/EC; Standardization Mandates: M/396. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
You can purchase SIST EN 12881-1:2014 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of SIST standards.
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.NRPFördergurte - Brandtechnische Prüfungen - Teil 1: Prüfungen mit dem PropanbrennerCourroies transporteuses - Essais de simulation d'inflammation - Partie 1: Essais avec brûleur propaneConveyor belts - Fire simulation flammability testing - Part 1: Propane burner tests53.040.20Deli za transporterjeComponents for conveyors13.220.40Sposobnost vžiga in obnašanje materialov in proizvodov pri gorenjuIgnitability and burning behaviour of materials and productsICS:Ta slovenski standard je istoveten z:EN 12881-1:2014SIST EN 12881-1:2014en,fr,de01-julij-2014SIST EN 12881-1:2014SLOVENSKI
STANDARDSIST EN 12881-1:2006+A1:20081DGRPHãþD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12881-1
May 2014 ICS 13.220.40; 53.040.20 Supersedes EN 12881-1:2005+A1:2008English Version
Conveyor belts - Fire simulation flammability testing - Part 1: Propane burner tests
Courroies transporteuses - Essais de simulation d'inflammation - Partie 1: Essais avec brûleur propane
Fördergurte - Brandtechnische Prüfungen - Teil 1: Prüfungen mit dem Propanbrenner This European Standard was approved by CEN on 15 February 2014.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12881-1:2014 ESIST EN 12881-1:2014
Foreword .3 Introduction .4 1 Scope .5 2 Normative references .5 3 Propane gas supply .5 4 Method A – Two metre single burner test .6 4.1 Apparatus .6 4.2 Preparation of test pieces .9 4.3 Temperature at commencement of test .9 4.4 Number of tests .9 4.5 Procedure .9 4.6 Termination of tests. 10 4.7 Measurement of damage to test pieces . 10 4.8 Test report . 11 5 Method B – Double burner test . 12 5.1 Apparatus . 12 5.2 Preparation of test pieces . 13 5.3 Temperature at commencement of test . 13 5.4 Number of tests . 13 5.5 Procedure . 14 5.6 Termination of tests. 14 5.7 Measurement of damage to test pieces . 14 5.8 Test report . 15 6 Method C – Mid-scale fire propagation test . 15 6.1 Apparatus . 15 6.2 Preparation of test pieces . 23 6.3 Installation of the test pieces and burner . 23 6.4 Temperature at commencement of test . 23 6.5 Number of tests . 23 6.6 Procedure . 23 6.7 Termination of tests. 24 6.8 Measurement of damage to test pieces . 24 6.9 Exhaust temperature calibration . 25 6.10 Test report . 25 7 Method D Laboratory scale Fire Propagation Test . 26 7.1 Apparatus . 26 7.2 Preparation of test pieces . 27 7.3 Installation of the test piece and burner . 27 7.4 Test Conditions . 27 7.5 Procedure . 27 7.6 Termination of tests. 28 7.7 Measurement of damage to test pieces . 28 7.8 Test report . 28 Annex ZA (informative)
Relationship between this European Standard and the Essential Requirements of EU Directive 2006/42/EC . 33 Bibliography . 34
150 l/hr (D1) or 190 l/hr (D2). 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 10088-3, Stainless steels — Part 3: Technical delivery conditions for semi-finished products, bars, rods, wire, sections and bright products of corrosion resisting steels for general purposes EN 22768-1, General tolerances — Part 1: Tolerances for linear and angular dimensions without individual tolerance indications (ISO 2768-1) ISO 65, Carbon steel tubes suitable for screwing in accordance with ISO 7-1 ISO 9162, Petroleum products — Fuels (class F) — Liquefied petroleum gases — Specifications 3 Propane gas supply The burners used in each method shall be supplied from bottled propane gas complying with ISO 9162 which shall be fed to each burner, using high pressure propane hose having a minimum internal diameter of 6,3 mm, either: a) through a pressure reducing valve, a non-return valve and an orifice plate 1,7 mm thick with a 2,5 mm diameter hole; or b) through a pressure reducing valve and a non-return valve followed by a flow meter calibrated to ensure that the correct mass of gas is consumed. Before and during the test, immerse each gas cylinder to approximately two-thirds of its height in a bath of water at a temperature of (25 ± 3) °C. Ensure that each gas cylinder is not emptied at the end of a test by more than 90 % of its gas mass capacity. SIST EN 12881-1:2014
(450 ± 9) mm and an overall height of (220 ± 5) mm. The burner shall be made of welded steel tube complying with ISO 65, having a bore designation of DN 15 medium or heavy series. The tubing shall have
52 holes, each having a diameter of (1,5 ± 0,1) mm, spaced at 50 mm intervals. 4.1.4 Anemometer, or other means of measuring the air velocity in the gallery, which shall be located at a height of 350 mm on the centreline of the gallery, at least 7,25 m inside the gallery entrance and 750 mm from the end of the trestle nearest the gallery entrance. It is important that the air flow in the gallery is laminar and to this end equipment to assist in producing laminar flow may be used. 4.1.5 Thermocouple, to measure the temperature of the incoming air, located as shown in Figure 1. SIST EN 12881-1:2014
a) Plan view of gallery
b) Cross-section of front of gallery Key 1 rear of gallery 2 position of thermocouple on centre line 3 front of gallery Figure 1 — Location of thermocouple for measuring the temperature of incoming air General manufacturing tolerances shall be according to EN 22768-1, unless otherwise stated. SIST EN 12881-1:2014
Key 1 direction of air flow 8 gallery entrance 2 additional bar 9 test piece 3 to be clear of any cross bracing 10 edge of test piece flush with front of trestle 4 propane burner 11 350 mm to flow line 5 DN 15 heavy series tube 12 rod retainers 6 detail of trestle 13 DN 15 heavy series trestle 7 bars made of austenitic chrome/nickel steel, 14 detail of rod retaining angle
diameter 10 mm, length 1,4 m
Figure 2 — Propane burner trestle showing positions of burner and test piece SIST EN 12881-1:2014
a) Elevation
b) Plan view Key 1 threaded 2 hole (x 52) Figure 3 — Burner for Method A 4.2 Preparation of test pieces Cut two test pieces, each 2 m long × 1 200 mm wide or of full width if the conveyor belt is less than
1 200 mm wide. Lay the test pieces out for 24 h in dry conditions at any ambient temperature above 0 °C immediately prior to testing to remove residual curvature. 4.3 Temperature at commencement of test The ambient temperature at the commencement of the test shall be between 5 °C and 30 °C. 4.4 Number of tests Carry out two tests, one on each side of the belt, so that both covers are tested. 4.5 Procedure 4.5.1 Weigh the propane gas bottle prior to the test. SIST EN 12881-1:2014
Key 1 length of undamaged belting 2 trailing edge 3 damaged belting Figure 4 — Measurement of length of undamaged belting 4.8 Test report The test report shall include the following: a) reference to this part of EN 12281 and method, i.e. “EN 12881-1:2014, Method A”; b) name of institution carrying out the test; c) name of belt manufacturer; d) date of test; e) identification of the belt under test; f) for each test piece, the minimum length measured as being undamaged (4.7.2); g) mass of gas consumed; h) signature and name of person responsible for the test; i) any deviations from the procedure, including whether the test was terminated prematurely; SIST EN 12881-1:2014
Key 1 test piece 2 direction of air flow 3 double burner 4 trestle Figure 5 — Positions of trestle, double burner and test piece for Method B SIST EN 12881-1:2014
Key 1 supports 2 hole (x 52) 3 centre line of burner Figure 6 — Burner for Method B 5.2 Preparation of test pieces Cut two test pieces, each 2,5 m long × 1 200 mm wide or of full width if the conveyor belt is less than
1 200 mm wide. Lay the test pieces out for 24 h in dry conditions at any ambient temperature above 0 °C immediately prior to testing to remove residual curvature. 5.3 Temperature at commencement of test The ambient
...
記事のタイトル：SIST EN 12881-1：2014 - コンベヤーベルト - 火災シミュレーション可燃性試験 - パート1：プロパンバーナーテスト 記事の内容：EN 12881-1では、火災などの比較的高い局所的な熱源にさらされたコンベヤーベルトにおける炎の拡散を測定するための4つの方法について説明しています。コンベヤーベルトが受けた損傷や燃焼支持能力は、火災がテストピースにどれだけ広がるかを観察することで測定されます。方法Aでは、長さ2メートルのテストピースを使用し、バーナーを通じて10分間に(1.30±0.05)kgのプロパンガスを消費します。方法Bでは、長さ2.5メートルのテストピースを使用し、2つのバーナーを、テストピースの台に上下に取り付けて、それぞれのバーナーごとに10分間に(1.30±0.05)kgのプロパンガスを消費します。方法Cでは、長さ1.5メートルのテストピースを使用し、バーナーを通じて50分間に(565±10)gのプロパンガスを消費します。最後に、方法Dでは、長さ1.2メートルのテストピースを使用し、バーナーを通じて1時間あたり150リットル(D1)または190リットル(D2)のプロパンガスを消費します。
The article describes the SIST EN 12881-1:2014 standard, which discusses methods for conducting flammability testing on conveyor belts. There are four different methods outlined in the standard, all of which involve exposing the belt to a localized heat source, such as a fire, and observing how the flame spreads along the belt. Each method uses different test piece lengths and propane gas consumption rates. Method A uses a 2-meter test piece and consumes propane gas at a rate of (1.30 ± 0.05) kg per 10 minutes. Method B uses a 2.5-meter test piece with two burners, consuming propane gas at the same rate for each burner. Method C uses a 1.5-meter test piece and consumes propane gas at a rate of (565 ± 10) g per 50 minutes. Finally, Method D uses a 1.2-meter test piece and consumes propane gas at a rate of 150 l/hr (D1) or 190 l/hr (D2).
The article discusses the standards set by SIST EN 12881-1:2014 for testing the flammability of conveyor belts. The standard outlines four different methods for measuring how a flame spreads along a conveyor belt when exposed to a high heat source, such as a fire. Each method uses a different length of test piece and consumes propane gas at specific rates. These methods aim to measure the damage to the conveyor belt and its potential to support combustion.
記事タイトル：SIST EN 12881-1:2014 - コンベヤーベルト - 火災シミュレーションの可燃性試験 - パート1：プロパンバーナー試験 記事の内容：EN 12881-1は、火などの高い熱源にさらされたコンベヤーベルトに沿って炎がどれくらい広がるかを測定するための4つの方法を説明しています。火災がテスト片に沿って広がる程度を観察し、コンベヤーベルトが受ける損傷と燃焼を支援する傾向を測定します。A方式では、2mのテスト片を使用し、バーナーを通じて10分あたり(1.30 ± 0.05) kgのプロパンガスを消費します。B方式では、2.5mのテスト片を使用し、テスト片の支持架の上下に取り付けられた2つのバーナーからそれぞれ10分あたり(1.30 ± 0.05) kgのプロパンガスを消費します。C方式では、1.5mのテスト片を使用し、バーナーを通じて50分あたり(565 ± 10) gのプロパンガスを消費します。D方式では、1.2mのテスト片を使用し、バーナーを通じて時速150リットル(D1)または時速190リットル(D2)のプロパンガスを消費します。
기사 제목: SIST EN 12881-1:2014 - 컨베이어 벨트 - 화재 시뮬레이션 불연성 시험 - 파트 1: 프로판 버너 시험 기사 내용: EN 12881-1은 상대적으로 높은 지역적 열원인 화재와 같은 조건에 노출된 컨베이어 벨트를 따라 불꽃이 전파되는 것을 측정하기 위한 네 가지 방법을 설명한다. 컨베이어 벨트가 겪는 손상 및 연소를 지원하는 경향은 시험 조각을 따라 불이 얼마나 퍼지는지를 관찰하여 측정된다. A 방법은 2 미터 길이의 시험 조각을 사용하며, 버너를 통해 (1.30 ± 0.05) kg의 프로판 가스를 10분 동안 소모한다. B 방법은 2.5미터 길이의 시험 조각을 사용하며, 시험 조각 트레슬 위와 아래에 설치된 두 개의 버너를 통해 10분 동안 각각 (1.30 ± 0.05) kg의 프로판 가스를 소모한다. C 방법은 1.5 미터 길이의 시험 조각을 사용하며, 버너를 통해 (565 ± 10) g의 프로판 가스를 50분 동안 소모한다. 마지막으로 D 방법은 1.2미터 길이의 시험 조각을 사용하며, 버너를 통해 시간당 150 l (D1) 또는 190 l (D2)의 프로판 가스를 소모한다.
기사 제목: SIST EN 12881-1:2014 - 컨베이어 벨트 - 화재 시뮬레이션 가연성 실험 - 파트 1: 프로판 버너 실험 기사 내용: EN 12881-1은 불에 노출된 컨베이어 벨트를 따라 불꽃이 번질 수 있는 네 가지 방법을 설명한다. 컨베이어 벨트가 겪는 손상 및 연소 지원 경향은 화재가 시험 조각을 따라 얼마나 번지는지를 관찰하여 측정된다. A 방법은 길이가 2m인 시험 조각을 사용하며, 버너를 통해 프로판 가스를 (1.30 ± 0.05) kg/10분의 속도로 소비한다. B 방법은 길이가 2.5m인 시험 조각을 사용하며, 상부와 하부에 설치된 두 개의 버너를 통해 프로판 가스를 (1.30 ± 0.05) kg/10분의 속도로 각각 소비한다. C 방법은 길이가 1.5m인 시험 조각을 사용하며, 버너를 통해 프로판 가스를 (565 ± 10) g/50분의 속도로 소비한다. D 방법은 길이가 1.2m인 시험 조각을 사용하며, 버너를 통해 프로판 가스를 150 l/hr (D1) 또는 190 l/hr (D2)의 속도로 소비한다.
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.
Loading comments...