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HG/T 20521-1992 化工蒸汽系统设计规定

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基本信息
标准名称:化工蒸汽系统设计规定
中标分类: 化工 >> 化工机械与设备 >> 化工设备
ICS分类: 化工技术 >> 化工设备
发布部门:化学工业部
发布日期:1992-08-01
实施日期:1992-12-01
首发日期:1900-01-01
作废日期:1900-01-01
出版社:化工工业出版社
出版日期:1900-01-01
页数:35页
适用范围

本规定是指企业以热能作为供热,提供动力的全部热力系统,不适用于纯采暖的蒸汽系统。本规定是针对石油、化工企业编制的,根据将近廿年来国内建设的大、中型石油化工企业内燕汽系统所有的特点,在设计方面应遵循的基本原则和应解决的主要技术间题。小型热电项目的热力系统不属于本规定范围,本规定是针对整个企业而言的。当小型热电项目是本系统外的一个汽源时,则其设计过程中要与本系统发生技术上的衔接问题。此外,小型热电项目多属区域性的,在能耗指标上可供作参考

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所属分类: 化工 化工机械与设备 化工设备 化工技术 化工设备
基本信息
标准名称:低频/甚低频发射机电性能测量方法
英文名称:Methods of measurement of electrical performance for LF/VLF transmiters
中标分类:
发布日期:1996-08-30
实施日期:1997-01-01
首发日期:1900-01-01
作废日期:1900-01-01
出版日期:1900-01-01
页数:13页
适用范围

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所属分类:
Product Code:SAE J18
Title:Sponge and Expanded Cellular Rubber Products (Cancelled Jun 2006)
Issuing Committee:Committee On Automotive Rubber Specs
Scope: The SAE Committee on Automotive Rubber Specifications has concluded, that in light of the fact that SAE J18 is a mirror image of ASTM D 1056 (Vol. 8.01), SAE J18 will be eliminated in the year 2005.This SAE Recommended Practice covers flexible cellular rubber products known as sponge rubber and expanded rubber, but does not apply to latex foam rubber or ebonite cellular rubber. The base material for an open/closed cellular product may be made of synthetic, natural, reclaimed rubber, or a mixture, and may contain other polymers or chemicals, or both, which may be modified by organic or inorganic additives. These elastomeric materials have properties similar to those of vulcanized rubber, namely (a) the ability to be converted from a thermoplastic to a thermosetting state by crosslinking (vulcanization) and or (b) substantial recovery of their original shapes when strained or elongated, or both.Extruded or molded shapes of sizes too small for cutting standard test specimens are difficult to classify or test by these methods and will usually require special testing procedures.In case of conflict between the provisions of this general specification and those of detailed specifications or test methods for a particular product, the latter shall take precedence. Reference to the test methods in this document should specifically state the particular test or tests desired.The values stated in SI units are to be regarded as the standard. English units are included for reference only.The following safety hazards caveat pertains only to the test methods portions of this document: This document does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this document to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.NOTE -- ASTM D 1056-98 and ISO 6916-1 are similar to this document.