FRS_2_2009
ROHS符合性声明 REV.02(2009版) 空白

郵箱地址(E-mail Address): _______________________________________________________________
(Remark : if have some hazardous substances content can’t comply the maximum limits in the materials ,but comply ROHS avoid the requirement ofDirective, for example : Brass contain Pb , but Pb<3%, Brass metal <4% comply ROHS requirement bolt contain Steel ‘S contain Pb<0.3%, Steel metal ‘S Pb contain <0.35% comply ROHS requirement . different model or series manufacture , hazardous substances contain different , use some data sheet different explain.)
物質(Substance)最大允許含量(Maximum Limit)
鎘Cadmium (Cd)100ppm
鉛Lead (Pb)1000ppm
汞Mercury (Hg)1000ppm
六價鉻Hexavalent Chromium (Cr 6+)1000ppm
某高炉煤气发电机组汽轮机性能试验及分析

某高炉煤气发电机组汽轮机性能试验及分析发布时间:2022-12-28T08:12:22.237Z 来源:《工程建设标准化》2022年第17期作者:谭智华[导读] 某高炉煤气发电厂在运行中发现部分阀门内漏,运行期间波动频繁等情况,为改善机组运行情况,提高机组运行稳定性、经济性进行了针对性检修谭智华中国能源建设集团华中电力试验研究院有限公司,湖南长沙,410110 摘要某高炉煤气发电厂在运行中发现部分阀门内漏,运行期间波动频繁等情况,为改善机组运行情况,提高机组运行稳定性、经济性进行了针对性检修。
为验证修后效果特委托我公司对电厂2号机组的进行机组性能试验。
本文通过对汽轮机部分的试验数据对汽轮机出力、效率等检修后效果进行评价,并针对性做出后续调整建议。
关键词高炉煤气汽轮机内漏出力效率在国家“双碳”目标及“十四五”现代能源体系规划下,国家对全国煤电机组提出更高的能效要求。
机组的安全稳定运行、节能降耗必将为节能减碳做出重要的贡献。
1 设备概况本次试验机组为钢厂尾气发电机组。
电厂规模为:2×265t/h超高温亚临界一次中间再热煤气锅炉+2×80MW凝汽式汽轮机+2×85MW空冷发电机及其配套附属设施。
汽轮机为反动式通流结构、低压损型阀门、蜗壳式高、中压进汽结构等设计而成,型号为N80-16.7/566/566,形式为超高温、亚临界、一次中间再热、单轴、两缸、单排汽、湿冷凝汽式汽轮机。
额定出力80MW,额定主蒸汽流量230.4t/h。
2 试验依据及试验项目试验依据:(1)GB/T 8117.1-2008 汽轮机热力性能验收试验规程第1部分:方法A 大型凝汽式汽轮机高准确度试验;(2)DL/T904-2015《火力发电厂经济性指标计算办法》;(3)相关厂家设计资料。
试验项目:测算机组在额定负荷纯凝工况下的机组热耗率,并与设计值进行比较;试验条件【1】:轴封系统运行正常;真空系统严密性好,运行稳定;汽轮机及辅助设备运行正常、稳定、无异常泄漏。
ISO8407-2009金属和合金的耐腐蚀性.腐蚀试样中腐蚀生成物的清除

ISO 8407
Second edition 2009-11-01
Corrosion of metals and alloys — Removal of corrosion products from corrosion test specimens
Corrosion des métaux et alliages — Élimination des produits de corrosion sur les éprouvettes d'essai de corrosion
© ISO 2009 – All rights reserved
iii
INTERNATIONAL STANDARD
ISO 8407:2009(E)
Corrosion of metals and alloys — Removal of corrosion products from corrosion test specimens
2.1.2 If the treatment described in 2.1.1 does not remove all corrosion products, it will be necessary to use other procedures. These are of three types:
These procedures may, in some cases, also be applied to metal coatings. However, possible effects from the substrate must be considered.
2 Procedures
2.1 General
空气动力学课件

2
N-S方程的解算
理论解法
–非线性问题 –精确解的限制 –初边值条件的适定性 –物理模型 (粘性、热力学模型、 …) –优缺点的比较
N-S方程的解算
计算流体力学 (CFD)
–网格化的流场就是一个离散的世界
J.D. Anderson, “Computational Fluid Dynamics: The Basics with Applications”, McGraw-Hill, 1995
积分形式的连续方程
dV V dS 0 S t V V [ t ( V )]dV 0
微分形式的连续方程 ( V ) 0
t
连续方程
定常流动
( V ) 0
S
V dS 0
u sin / r v cos / r
Vr u cos v sin 0 1 V u sin v cos r 1 Irrotational flow? z V r 0 r V rV r 2 V dl V rd 2
旋度
V
z
v u x y
无旋流
有旋流
From M. van Dyke’s “An album of fluid motion” Video?
角变形率
角变形
2 (1 )
角变形率
xy
d v u dt x y
流线之间的质量流量
c2 c1
d V lim n 0 n dn
坚持的例子100字左右

坚持的例子100字左右坚持的例子100字左右篇1唐伯虎潜心学画唐伯虎是明朝著名的画家和文学家。
小的时候在画画方面显示了超人的才华。
唐伯虎拜师。
拜在大画家沈周门下。
学习自然更加刻苦勤奋。
掌握绘画技艺很快。
深受沈周的称赞。
不料。
由于沈周的称赞。
这次使一向谦虚的唐伯虎也渐渐地产生了自满的情绪。
沈周看在眼中。
记在心里。
一次吃饭。
沈周让唐伯虎去开窗户。
唐伯虎发现自己手下的窗户竟是老师沈周的一幅画。
唐伯虎非常惭愧。
从此潜心学画。
坚持的例子100字左右篇2陆羽弃佛从文唐朝著名学者陆羽。
从小是个孤儿。
被智积禅师抚养长大。
陆羽虽身在庙中。
却不愿终日诵经念佛。
而是喜欢吟读诗书。
陆羽执意下山求学。
遭到了禅师的反对。
禅师为了给陆羽出难题。
同时也是为了更好地教育他。
便叫他学习冲茶。
在钻研茶艺的过程中。
陆羽碰到了一位好心的老婆婆。
不仅学会了复杂的冲茶的技巧。
更学会了不少读书和做人的道理。
当陆羽最终将一杯热气腾腾的苦丁茶端到禅师面前时。
禅师终于答应了他下山读书的要求。
后来。
陆羽撰写了广为流传的茶经。
把祖国的茶艺文化发扬光大!坚持的例子100字左右篇3徐霞客志在天下有一天。
江边发生了一件怪事。
很多人在打捞落水的石狮。
却怎么也找不着。
这时。
一个叫徐霞客的小孩说。
只要溯江而上。
就能找到石狮。
果然石狮找到了。
大家都赞誉这个聪颖的小孩。
原来他就是长大后成为伟大地理学家。
旅行家的徐霞客。
坚持的例子100字左右篇4少年包拯学断案包拯包青天。
自幼聪颖。
勤学好问。
尤喜推理断案。
其家父与知县交往密切。
包拯从小耳濡目染。
学会了不少的断案知识。
尤其在焚庙杀僧一案中。
包拯根据现场的蛛丝马迹。
剥茧抽丝。
排查出犯罪嫌疑人后。
又假扮阎王。
审清事实真—相。
协助知县缉拿凶手。
为民除害。
他努力学习律法刑理知识。
为长大以后断案如神。
为民伸冤。
打下了深厚的知识基础。
坚持的例子100字左右篇5欧洲文艺复兴时期的著名画家达·芬奇,从小爱好绘画。
父亲送他到当时意大利的名城佛罗伦萨,拜名画家佛罗基奥为师。
CTCS-3级列控系统标准体系及需求规范

临时限速服务器(TSRS)接口规范
6 (含TSRS与RBC、TCC、CTC/TSRT、CSM、 相邻TSRS接口)
7 司法记录器数据下载接口规范
正在编制
8
CTCS-3级列控系统标准规范
一、标准体系结构:系统规范—测试规范
序号
规范名称
1 CTCS-3级列控系统测试案例(V3.0)
文号/进展情况 科技运[2009] 59号
接口规范 ➢设备接口规范
系统 规范
设备规范 ➢设备技术规范
测试规范 ➢ 测试案例
系统规范涵盖运营需求、设备、接口和测试四个方面。
5
CTCS-3级列控系统标准规范
一、标准体系结构:系统规范—运营需求规范
序号
规范名称
文号/进展情况
1 CTCS-3级列控系统总体技术方案(含运营规则)(V1.0) 科技运[2008]34号
5 PTH、SMD元件进厂检验工艺规程
6 SMD元件贴装工艺规程
7 波峰焊接通用工艺规程
8 存储管理工艺规程
9 端子压接工艺规程
序号
规范名称
10 返工返修工艺规程
11 化学品物料使用工艺规程
12 回流固化通用工艺规程
13 庞巴迪产品条形码编码及标签管理要求
14 手工操作与完成过程自检程序
15 手工焊接通用工艺规程
➢强制性功能需求:在所有应用项目中都应遵守的要 求,并应遵守在系统需求规范(SRS)及相关强制 性规范中所描述的应用要求。
➢非强制性功能需求:如果选择该功能,应遵守在系 统需求规范(SRS)及相关强制性规范中所描述的 应用要求。
19
CTCS-3级列控系统标准规范
二、功能需求规范(FRS):概述
FFS膜企业标准(2009)

G75 南京扬子塑料化工有限责任公司企业标准重包装用FFS 薄膜南京扬子塑料化工有限责任公司 发布QQ/320116YSH 01-2009前言本标准原规范性引用文件GB/T 13022、GB/T 1039、GB/T1040等标准被GB/T1040系列标准替代,GB/T 16578、GB/T9639、GB/T2828等均被相应的系列标准替代,现按GB/T 1.1-2000《标准化工作导则第1部分:标准的结构和编写规则》和GB/T1.2-2002《标准化工作导则第2部分:标准中规范性技术要素内容的确定方法》规定,对本标准相关内容进行修订。
本标准与Q/320123YSH 01-2006相比较,主要变化如下:——将标准名称由“FFS袋用薄膜”更改为“重包装用FFS薄膜”;——更新了第2部分规范性引用文件;——增加了第3部分术语和定义;——增加了膜卷外观、接头、膜面压花等的要求;——将物理性能中“拉伸强度”更改为“拉伸断裂应力”、“断裂伸长率”更改为“断裂标称应变”、“屈服强度”更改为“屈服应力”、“冲击强度”更改为“冲击破损质量”等;——删除了原冲击强度中的破损数量,增加了折痕处和压花处的冲击破损质量的要求;——将摩擦系数的要求由≥0.3调整为0.25~0.80。
——增加了型试检验的项目耐热性、耐寒性、耐跌落性和卫生性能的要求;——将拉伸断裂应力、断裂标称应变及屈服应力的试样由原标准的Ⅰ型更改为5型。
——将相应的试验方法更改为按新引用文件规定进行。
本标准由南京扬子塑料化工有限责任公司提出并起草。
本标准主要起草人:雍玉荣、宋岩。
本标准于2002年12月首次发布,2006年2月第一次修订,2009年3月第二次修订。
本标准自发布之日起原标准Q/320123YSH 01-2006作废。
重包装用FFS薄膜1 范围本标准规定了重包装用FFS薄膜的要求、试验方法、检验规则及标志、包装、运输和贮存。
本标准适用于由线型低密度聚乙烯树脂(LLDPE)和低密度聚乙烯树脂(LDPE)为主要原料通过多层共挤、吹塑、印刷等形成的重包装用FFS薄膜(以下简称薄膜或膜)。
星玛电梯图片讲解

MMR电梯图片讲解2009年3月2009MMR控制柜制动电阻永磁同步曳引机抱闸辅助开关故障现象:电梯平层后频繁死机. 故障代码:TCD=92 处理方法:经检查平层后MC接触器没 有弹开,处于粘连状态,接触器拆 除后发现接触器铁心上面有粘连物 .见图2用细砂打磨后恢复接触器 ,电梯正常.MC 接触器图1MC接触器拆除后(图2)星玛MMR电梯MC接触器故障分析粘连物控制柜分布图SMCB-3000CIVHDSL-3下换速MHDSL-4下换速PSK-锁梯FIRE2-消防ESTOP-急停FRS-消防返回BKM-抱闸开关INS-慢车IUP-上行IDN-下行VHUSL-3上换速DOOR-门系统DL-下限位HUSL-2上换速HDSL-2下换速MHUSL-4上换速USL-1上换速UL-上限位DSL-1下换速DCL-关门到位IDS-下平层IUS-上平层DOL-开门到位拨码开关呼梯芯片SEMR-100WTCT-5911OPB-10130%FULL-满载OVERLOAD-超载SAFETY-安全触板PHOTO-光电ATT-司机IND-专用BBSW-层层停DRST-门机开关OPEN-开门输入CLOSE-关门输入CJB-100门机变频器OOUT-开门到位输出COUT-关门到位输出SOUT-门位置信号输出OIN-开门指令输入CIN-关门指令输入DSIN-外接开门到位输入DI1主板DOC-103SPEC1 1脚并联主梯2脚并联副梯(副梯1.2都要拨)3脚未使用4脚PTM功能5.6未使用7消防功能 8脚未使用SPEC2未使用TXI为外呼通讯指示灯.TX2为CRT通讯(未使用工作状态:(正常闪烁.异常灭).故障现象:外呼出现不显或乱闪处理方法:1.检查底楼DHG-161板上HA的1. 2脚的终端电阻是否有120欧姆2.拨掉所有DHG-161板上HA插头,在机房查 XHA的1.2脚是否有120欧姆.有呼梯正常)DI1主板DOC-103DIRE 编码器反向检测(状态: 正常灭,异常亮)IALM 安全回路,DPC板,CPU 通讯,CPU ERROR检 测(状态:正常灭,异常亮)SYS1 DOC板WDT信号检测(状 态;正常闪烁,异常亮或灭)SYS2 DPC通讯检测(状态:正常 闪烁,异常亮或灭)PF P48V电源故障检测(状态 :正常灭,异常亮)LON LON通讯检测(轿厢DCL 通讯.状态:正常闪烁,异常 亮或灭CDS 轿门开关检测(状态:门关灯 亮,门开灯灭)LDC 平层感应器检测(状态:平层 灯灭,脱离门区灯亮)。
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InventoriesFRS 2 Inventories was issued by the CCDG in January 2003 and was operative for financial statements covering periods beginning on or after 1 July 1997. This Standard was revised in July 2004 and supersedes FRS 2 Inventories issued in January 2003. Consequential amendments were made in February 2007.FRS 2FINANCIAL REPORTING STANDARDContentsparagraphs INTRODUCTION IN1-IN17 Financial Reporting Standard 2InventoriesOBJECTIVE 1 SCOPE 2-5 DEFINITIONS 6-8 MEASUREMENT OF INVENTORIES 9-33 Cost of Inventories 10-22 Costs of Purchase 11 Costs of Conversion 12-14 Other Costs 15-18 Cost of Inventories of a Service Provider 19 Cost of Agricultural Produce Harvested from Biological Assets 20 Techniques for the Measurement of Cost 21-22 Cost Formulas 23-27 Net Realisable Value 28-33 RECOGNITION AS AN EXPENSE 34-35 DISCLOSURE 36-39 EFFECTIVE DATE 40 WITHDRAWAL OF OTHER PRONOUNCEMENTS 41-42 APPENDIX:Amendments to Other PronouncementsTABLE OF CONCORDANCEIntroductionIN1. Financial Reporting Standard 2 Inventories (FRS 2) replaces FRS 2 Inventories (issued in 2003) and should be applied for annual periods beginning on or after 1 January 2005. Earlier application is encouraged. The Standard also supersedes INT FRS 1 Consistency—Different Cost Formulas for Inventories.Reasons for Revising FRS 2IN2. The Council on Corporate Disclosure and Governance issued this revised FRS 2 as part of the improvements to Financial Reporting Standards. The objectives of the improvements were to reduce or eliminate alternatives, redundancies and conflicts within the Standards, to deal with some convergence issues and to make other improvements.IN3. For FRS 2, the main objective was a limited revision to reduce alternatives for the measurement of inventories. The fundamental approach to accounting for inventories contained in FRS 2 was not considered.The Main ChangesIN4. The main changes from the previous version of FRS 2 are described below.Objective and ScopeIN5. The objective and scope paragraphs of FRS 2 were amended by removing the words ‘held under the historical cost system’, to clarify that the Standard applies to all inventories that are not specifically excluded from its scope.Scope ClarificationIN6. The Standard clarifies that some types of inventories are outside its scope while certain other types of inventories are exempted only from the measurement requirements in the Standard.IN7. Paragraph 3 establishes a clear distinction between those inventories that are entirely outside the scope of the Standard (described in paragraph 2) and those inventories that are outside the scope of the measurement requirements but within the scope of the other requirements in the Standard.Scope ExemptionsProducers of agricultural and forest products, agricultural produce after harvest and minerals and mineral productsIN8. The Standard does not apply to the measurement of inventories of producers of agricultural and forest products, agricultural produce after harvest, and minerals and mineral products, to the extent that they are measured at net realisable value in accordance with well-established industry practices. The previous version of FRS 2 was amended to replace the words ‘mineral ores’ with ‘minerals and mineral products’ to clarify that the scope exemption is not limited to the early stage of extraction of mineral ores.Inventories of commodity broker-tradersIN9. The Standard does not apply to the measurement of inventories of commodity broker-traders to the extent that they are measured at fair value less costs to sell.Cost of InventoriesCosts of purchaseIN10. FRS 2 does not permit exchange differences arising directly on the recent acquisition of inventories invoiced in a foreign currency to be included in the costs of purchase of inventories. This change from the previous version of FRS 2 resulted from the elimination of the allowed alternative treatment of capitalising certain exchange differences in FRS 21 The Effects of Changes in Foreign Exchange Rates. That alternative had already been largely restricted in its application by INT FRS 11 Foreign Exchange—Capitalisation of Losses from Severe Currency Devaluations. INT FRS 11 has been superseded as a result of the revision of FRS 21 in 2004.Other costsIN11. Paragraph 18 was inserted to clarify that when inventories are purchased with deferred settlement terms, the difference between the purchase price for normal credit terms and the amount paid is recognised as interest expense over the period of financing.Cost FormulasConsistencyIN12. The Standard incorporates the requirements of INT FRS 1 Consistency—Different Cost Formulas for Inventories that an entity use the same cost formula for all inventories having a similar nature and use to the entity. INT FRS 1 is superseded.Prohibition of LIFO as a cost formulaIN13. The Standard does not permit the use of the last-in, first-out (LIFO) formula to measure the cost of inventories.Recognition as an ExpenseIN14. The Standard eliminates the reference to the matching principle.IN15. The Standard describes the circumstances that would trigger a reversal of a write-down of inventories recognised in a prior period.DisclosureInventories carried at fair value less costs to sellIN16. The Standard requires disclosure of the carrying amount of inventories carried at fair value less costs to sell.Write-down of inventoriesIN17. The Standard requires disclosure of the amount of any write-down of inventories recognised as an expense in the period and eliminates the requirement to disclose the amount of inventories carried at net realisable value.FINANCIAL REPORTING STANDARD FRS 2InventoriesObjective1. The objective of this Standard is to prescribe the accounting treatment for inventories. Aprimary issue in accounting for inventories is the amount of cost to be recognised as an asset and carried forward until the related revenues are recognised. This Standard provides guidance on the determination of cost and its subsequent recognition as an expense, including any write-down to net realisable value. It also provides guidance on the cost formulas that are used to assign costs to inventories.Scope2. This Standard applies to all inventories, except:(a) work in progress arising under construction contracts, including directlyrelated service contracts (see FRS 11 Construction Contracts);(b) financial instruments; and(c) biological assets related to agricultural activity and agricultural produce at thepoint of harvest (see FRS 41 Agriculture).3. This Standard does not apply to the measurement of inventories held by:(a) producers of agricultural and forest products, agricultural produce afterharvest, and minerals and mineral products, to the extent that they aremeasured at net realisable value in accordance with well-established practicesin those industries. When such inventories are measured at net realisablevalue, changes in that value are recognised in profit or loss in the period of thechange.(b) commodity broker-traders who measure their inventories at fair value lesscosts to sell. When such inventories are measured at fair value less costs tosell, changes in fair value less costs to sell are recognised in profit or loss inthe period of the change.4. The inventories referred to in paragraph 3(a) are measured at net realisable value at certainstages of production. This occurs, for example, when agricultural crops have been harvested or minerals have been extracted and sale is assured under a forward contract or a government guarantee, or when an active market exists and there is a negligible risk of failure to sell. These inventories are excluded from only the measurement requirements of this Standard.5. Broker-traders are those who buy or sell commodities for others or on their own account. Theinventories referred to in paragraph 3(b) are principally acquired with the purpose of selling in the near future and generating a profit from fluctuations in price or broker-traders’ margin.When these inventories are measured at fair value less costs to sell, they are excluded from only the measurement requirements of this Standard.Definitions6. The following terms are used in this Standard with the meanings specified:Inventories are assets:(a) held for sale in the ordinary course of business;(b) in the process of production for such sale; or(c) in the form of materials or supplies to be consumed in the production processor in the rendering of services.Net realisable value is the estimated selling price in the ordinary course of business less the estimated costs of completion and the estimated costs necessary to make the sale.Fair value is the amount for which an asset could be exchanged, or a liability settled, between knowledgeable, willing parties in an arm’s length transaction.7. Net realisable value refers to the net amount that an entity expects to realise from the sale ofinventory in the ordinary course of business. Fair value reflects the amount for which the same inventory could be exchanged between knowledgeable and willing buyers and sellers in the marketplace. The former is an entity-specific value; the latter is not. Net realisable value for inventories may not equal fair value less costs to sell.8. Inventories encompass goods purchased and held for resale including, for example,merchandise purchased by a retailer and held for resale, or land and other property held for resale. Inventories also encompass finished goods produced, or work in progress being produced, by the entity and include materials and supplies awaiting use in the production process. In the case of a service provider, inventories include the costs of the service, as described in paragraph 19, for which the entity has not yet recognised the related revenue (see FRS 18 Revenue).Measurement of Inventories9. Inventories shall be measured at the lower of cost and net realisable value.Cost of Inventories10. The cost of inventories shall comprise all costs of purchase, costs of conversion andother costs incurred in bringing the inventories to their present location and condition. Costs of Purchase11. The costs of purchase of inventories comprise the purchase price, import duties and othertaxes (other than those subsequently recoverable by the entity from the taxing authorities), and transport, handling and other costs directly attributable to the acquisition of finished goods, materials and services. Trade discounts, rebates and other similar items are deducted in determining the costs of purchase.Costs of Conversion12. The costs of conversion of inventories include costs directly related to the units of production,such as direct labour. They also include a systematic allocation of fixed and variable production overheads that are incurred in converting materials into finished goods. Fixed production overheads are those indirect costs of production that remain relatively constant regardless of the volume of production, such as depreciation and maintenance of factory buildings and equipment, and the cost of factory management and administration. Variable production overheads are those indirect costs of production that vary directly, or nearly directly, with the volume of production, such as indirect materials and indirect labour.13. The allocation of fixed production overheads to the costs of conversion is based on thenormal capacity of the production facilities. Normal capacity is the production expected to be achieved on average over a number of periods or seasons under normal circumstances, taking into account the loss of capacity resulting from planned maintenance. The actual level of production may be used if it approximates normal capacity. The amount of fixed overhead allocated to each unit of production is not increased as a consequence of low production oridle plant. Unallocated overheads are recognised as an expense in the period in which they are incurred. In periods of abnormally high production, the amount of fixed overhead allocated to each unit of production is decreased so that inventories are not measured above cost.Variable production overheads are allocated to each unit of production on the basis of the actual use of the production facilities.14. A production process may result in more than one product being produced simultaneously.This is the case, for example, when joint products are produced or when there is a main product and a by-product. When the costs of conversion of each product are not separately identifiable, they are allocated between the products on a rational and consistent basis. The allocation may be based, for example, on the relative sales value of each product either at the stage in the production process when the products become separately identifiable, or at the completion of production. Most by-products, by their nature, are immaterial. When this is the case, they are often measured at net realisable value and this value is deducted from the cost of the main product. As a result, the carrying amount of the main product is not materially different from its cost.Other Costs15. Other costs are included in the cost of inventories only to the extent that they are incurred inbringing the inventories to their present location and condition. For example, it may be appropriate to include non-production overheads or the costs of designing products for specific customers in the cost of inventories.16. Examples of costs excluded from the cost of inventories and recognised as expenses in theperiod in which they are incurred are:(a) abnormal amounts of wasted materials, labour or other production costs;(b) storage costs, unless those costs are necessary in the production process before afurther production stage;(c) administrative overheads that do not contribute to bringing inventories to their presentlocation and condition; and(d) selling costs.17. FRS 23 Borrowing Costs identifies limited circumstances where borrowing costs are includedin the cost of inventories.18. An entity may purchase inventories on deferred settlement terms. When the arrangementeffectively contains a financing element, that element, for example a difference between the purchase price for normal credit terms and the amount paid, is recognised as interest expense over the period of the financing.Cost of Inventories of a Service Provider19. To the extent that service providers have inventories, they measure them at the costs of theirproduction. These costs consist primarily of the labour and other costs of personnel directly engaged in providing the service, including supervisory personnel, and attributable overheads.Labour and other costs relating to sales and general administrative personnel are not included but are recognised as expenses in the period in which they are incurred. The cost of inventories of a service provider does not include profit margins or non-attributable overheads that are often factored into prices charged by service providers.Cost of Agricultural Produce Harvested from Biological Assets20. In accordance with FRS 41 Agriculture, inventories comprising agricultural produce that anentity has harvested from its biological assets are measured on initial recognition at their fair value less estimated point-of-sale costs at the point of harvest. This is the cost of the inventories at that date for application of this Standard.Techniques for the Measurement of Cost21. Techniques for the measurement of the cost of inventories, such as the standard cost methodor the retail method, may be used for convenience if the results approximate cost. Standard costs take into account normal levels of materials and supplies, labour, efficiency and capacity utilisation. They are regularly reviewed and, if necessary, revised in the light of current conditions.22. The retail method is often used in the retail industry for measuring inventories of largenumbers of rapidly changing items with similar margins for which it is impracticable to use other costing methods. The cost of the inventory is determined by reducing the sales value of the inventory by the appropriate percentage gross margin. The percentage used takes into consideration inventory that has been marked down to below its original selling price. An average percentage for each retail department is often used.Cost Formulas23. The cost of inventories of items that are not ordinarily interchangeable and goods orservices produced and segregated for specific projects shall be assigned by using specific identification of their individual costs.24. Specific identification of cost means that specific costs are attributed to identified items ofinventory. This is the appropriate treatment for items that are segregated for a specific project, regardless of whether they have been bought or produced. However, specific identification of costs is inappropriate when there are large numbers of items of inventory that are ordinarily interchangeable. In such circumstances, the method of selecting those items that remain in inventories could be used to obtain predetermined effects on profit or loss.25. The cost of inventories, other than those dealt with in paragraph 23, shall be assignedby using the first-in, first-out (FIFO) or weighted average cost formula. An entity shall use the same cost formula for all inventories having a similar nature and use to the entity. For inventories with a different nature or use, different cost formulas may be justified.26. For example, inventories used in one operating segment may have a use to the entitydifferent from the same type of inventories used in another operating segment. However, a difference in geographical location of inventories (or in the respective tax rules), by itself, is not sufficient to justify the use of different cost formulas.27. The FIFO formula assumes that the items of inventory that were purchased or produced firstare sold first, and consequently the items remaining in inventory at the end of the period are those most recently purchased or produced. Under the weighted average cost formula, the cost of each item is determined from the weighted average of the cost of similar items at the beginning of a period and the cost of similar items purchased or produced during the period.The average may be calculated on a periodic basis, or as each additional shipment is received, depending upon the circumstances of the entity.Net Realisable Value28. The cost of inventories may not be recoverable if those inventories are damaged, if they havebecome wholly or partially obsolete, or if their selling prices have declined. The cost of inventories may also not be recoverable if the estimated costs of completion or the estimated costs to be incurred to make the sale have increased. The practice of writing inventories down below cost to net realisable value is consistent with the view that assets should not be carried in excess of amounts expected to be realised from their sale or use.29. Inventories are usually written down to net realisable value item by item. In somecircumstances, however, it may be appropriate to group similar or related items. This may be the case with items of inventory relating to the same product line that have similar purposesor end uses, are produced and marketed in the same geographical area, and cannot be practicably evaluated separately from other items in that product line. It is not appropriate to write inventories down on the basis of a classification of inventory, for example, finished goods, or all the inventories in a particular operating segment. Service providers generally accumulate costs in respect of each service for which a separate selling price is charged.Therefore, each such service is treated as a separate item.30. Estimates of net realisable value are based on the most reliable evidence available at thetime the estimates are made, of the amount the inventories are expected to realise. These estimates take into consideration fluctuations of price or cost directly relating to events occurring after the end of the period to the extent that such events confirm conditions existing at the end of the period.31. Estimates of net realisable value also take into consideration the purpose for which theinventory is held. For example, the net realizable value of the quantity of inventory held to satisfy firm sales or service contracts is based on the contract price. If the sales contracts are for less than the inventory quantities held, the net realisable value of the excess is based on general selling prices. Provisions may arise from firm sales contracts in excess of inventory quantities held or from firm purchase contracts. Such provisions are dealt with under FRS 37 Provisions, Contingent Liabilities and Contingent Assets.32. Materials and other supplies held for use in the production of inventories are not written downbelow cost if the finished products in which they will be incorporated are expected to be sold at or above cost. However, when a decline in the price of materials indicates that the cost of the finished products exceeds net realisable value, the materials are written down to net realisable value. In such circumstances, the replacement cost of the materials may be the best available measure of their net realisable value.33. A new assessment is made of net realisable value in each subsequent period. When thecircumstances that previously caused inventories to be written down below cost no longer exist or when there is clear evidence of an increase in net realisable value because of changed economic circumstances, the amount of the write-down is reversed (i.e. the reversal is limited to the amount of the original write-down) so that the new carrying amount is the lower of the cost and the revised net realisable value. This occurs, for example, when an item of inventory that is carried at net realisable value, because its selling price has declined, is still on hand in a subsequent period and its selling price has increased.Recognition as an Expense34. When inventories are sold, the carrying amount of those inventories shall berecognised as an expense in the period in which the related revenue is recognised.The amount of any write-down of inventories to net realisable value and all losses of inventories shall be recognised as an expense in the period the write-down or loss occurs. The amount of any reversal of any write-down of inventories, arising from an increase in net realisable value, shall be recognised as a reduction in the amount of inventories recognised as an expense in the period in which the reversal occurs.35. Some inventories may be allocated to other asset accounts, for example, inventory used as acomponent of self-constructed property, plant or equipment. Inventories allocated to another asset in this way are recognised as an expense during the useful life of that asset. Disclosure36. The financial statements shall disclose:(a) the accounting policies adopted in measuring inventories, including the costformula used;(b) the total carrying amount of inventories and the carrying amount inclassifications appropriate to the entity;(c) the carrying amount of inventories carried at fair value less costs to sell;(d) the amount of inventories recognised as an expense during the period;(e) the amount of any write-down of inventories recognised as an expense in theperiod in accordance with paragraph 34;(f) the amount of any reversal of any write-down that is recognised as a reductionin the amount of inventories recognised as expense in the period inaccordance with paragraph 34;(g) the circumstances or events that led to the reversal of a write-down ofinventories in accordance with paragraph 34; and(h) the carrying amount of inventories pledged as security for liabilities.37. Information about the carrying amounts held in different classifications of inventories and theextent of the changes in these assets is useful to financial statement users. Common classifications of inventories are merchandise, production supplies, materials, work in progress and finished goods. The inventories of a service provider may be described as work in progress.38. The amount of inventories recognised as an expense during the period, which is oftenreferred to as cost of sales, consists of those costs previously included in the measurement of inventory that has now been sold and unallocated production overheads and abnormal amounts of production costs of inventories. The circumstances of the entity may also warrant the inclusion of other amounts, such as distribution costs.39. Some entities adopt a format for profit or loss that results in amounts being disclosed otherthan the cost of inventories recognised as an expense during the period. Under this format, an entity presents an analysis of expenses using a classification based on the nature of expenses. In this case, the entity discloses the costs recognised as an expense for raw materials and consumables, labour costs and other costs together with the amount of the net change in inventories for the period.Effective Date40. An entity shall apply this Standard for annual periods beginning on or after 1 January2005. Earlier application is encouraged. If an entity applies this Standard for a period beginning before 1 January 2005, it shall disclose that fact.Withdrawal of Other Pronouncements41. This Standard supersedes FRS 2 Inventories (issued in 2003).42. This Standard supersedes INT FRS 1 Consistency—Different Cost Formulas for Inventories.AppendixAmendments to Other PronouncementsThe amendments in this appendix shall be applied for annual periods beginning on or after 1 January 2005. If an entity applies this Standard for an earlier period, these amendments shall be applied for that earlier period.A1. In FRS 14 Segment Reporting, paragraph 22 is amended to read as follows:22. Some guidance for cost allocation can be found in other Standards. For example,paragraphs 11-20 of FRS 2 Inventories (as revised in 2004) provide guidance onattributing and allocating costs to inventories, and paragraphs 16-21 of FRS 11Construction Contracts provide guidance on attributing and allocating costs tocontracts. That guidance may be useful in attributing or allocating costs to segments. A2. In FRS 34 Interim Financial Reporting, paragraphs 25 and 27 of Appendix B and paragraph 1 of Appendix C are amended to read as follows:Appendix BInventories25. Inventories are measured for interim financial reporting by the same principles as atfinancial year-end. FRS 2 Inventories establishes standards for recognising andmeasuring inventories. Inventories pose particular problems at any financial reportingdate because of the need to determine inventory quantities, costs, and net realisablevalues. Nonetheless, the same measurement principles are applied for interiminventories. To save cost and time, entities often use estimates to measureinventories at interim dates to a greater extent than at annual reporting dates.Following are examples of how to apply the net realisable value test at an interimdate and how to treat manufacturing variances at interim dates.27. [Deleted]Appendix C1. Inventories: Full stock-taking and valuation procedures may not be required forinventories at interim dates, although it may be done at financial year-end. It may besufficient to make estimates at interim dates based on sales margins.A3. [Not used]。