Standard

SAE J342

Revidert

Merknad: Denne standarden har en ny utgave: SAE J342

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Omfang

This recommended Practice establishes equipment and procedures for the evaluation of the effectiveness and other performance characteristics of spark arresters or turbochargers used on the exhaust system of large engines normally used in a railroad locomotive, stationary power plant, and other similar applications. This recommended practive does not cover applications requiring flame arresting, exhaust gas cooling, or isolation form explosive gases. Two uniform testing methods are offered; a laboratory test using ambient air (cold test) and an engine test using exhaust gases (hot test), which may be used by spark arrester manufacturers, governmental bodies, an engine spark arrester users. Though the engine test (hot test), is preferred, approval can be sought based on the lab test (cold test) over the airflow range tested. Arresters meeting this standard should not be expected to adequately arrest sparks when tilted more than 45 deg form their normal operating position. Spark arresters or turbochargers qualified by an engine test can be applied to different engines of similar design without a complete retest, provided the data shows it to be effective in the applicable flow ranges. Additional test data may be obtained to determine effectiveness at higher or lower flow ranges. Purpose- The purpose of this SAE Recommended Practice is to provide a standard method of testing to evaluate spark arresters or turbochargers1 as spark arresters for use with compression ignition internal combustion engines. This document provides a method to determine acceptability of various spark arresters by regulatory agencies, but is not intended to establish the performance level required for adequate fire protection.2 1 Turbochargers are generally very effective spark arresters. 2 When required performance levels are established, consideration should be given to the area in which the engine is operating. For example, in areas where daytime relative humidity of the atmosphere is below 30% for relatively long periods of time and there is considerable combustible material adjacent to the engine, the best spark arrester should be utilized. In areas of high humidity and little or no combustible material, spark arresters of lower ratings could be employed.

Dokumentinformasjon

  • Standard fra SAE_AC
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