BD4732中文资料
承压设备无损检测标准特点介绍_2
日星期三
•
3、Patienceisbitter, butitsfruitissweet.(Jean Jacques Rousseau, Frenchthinker)忍耐是痛苦的，但它的果实是甜蜜的。08:305.26.202108:305.26.202108:3008:30:575.26.202108:305.26.2021
6、 焊接制造标准：JB4708-2000《钢制压力容器
ห้องสมุดไป่ตู้
焊接工艺评定》、JB4709-2000《钢制压力容器焊接
规程 》。 7/14/2021
5
承压设备标准体系（压力容器）
二、铝制压力容器标准体系：国内初步形成以 JB/T4734-2002《铝制焊接容器》、JB/T7261-94 《铝制板翅式换热器 技术条件》 、GB/T8005-87
承压设备标准体系（锅炉）
JB/T2637-93《锅炉承压球墨铸铁件技术条件》、GB3087-99 《低中压锅炉用无缝钢管》等。
四、焊制造标准：JBJ27-96《工业锅炉安装工程施工及验 收规范》、JB/Z361-89《锅壳锅炉受压元件制造工艺》、 JB1609-93《锅炉锅筒制造技术条件》、JB/T1610-93《锅 炉集箱制造 技术条件》、JB1611-93《锅炉管子制造技术条 件》、JB/T1613-93《锅炉受压元件焊接 技术条件》等。 五、无损检测标准：JB4730-2004《承压设备无损检测》等。
六、试验方法标准：GB/T10180-98《工业锅炉热工试验规 范》、GB/T10184-98《电站锅炉性能试验规程》、 GB10180-88《工业锅炉热工试验规范》、GB/T13311-91 《锅炉受压元件焊接接头机械性能试验方法》、 JB/T161294《锅炉水压试验技术条件》等。
1N4732A-A中文资料
1N4728A - 1N4761A1.0W ZENEDIODENote: 1. Valid provided that leads are kept at T L @ 50°C with lead length = 9.5mm (3/8”) from case.2. EC Directive 2002/95/EC (RoHS) revision 13.2.2003. Glass and High Temperature Solder Exemptions Applied where applicable,see EU Directive Annex Notes 5 and 7.Mechanical Data·1.0 Watt Power Dissipation · 3.3V - 75V Nominal Zener Voltage ·Standard V Z Tolerance is 5%·Lead Free Finish, RoHS Compliant (Note 2)·Case: DO-41·Case Material: Glass. UL Flammability Classification Rating 94V-0·Moisture Sensitivity: Level 1 per J-STD-020C ·Terminals: Finish ¾ Sn96.5Ag3.5. Solderable per MIL-STD-202, Method 208·Polarity: Cathode Band ·Marking: Type Number·Weight: 0.35 grams (approximate)FeaturesElectrical Characteristics @ T A = 25°C unless otherwise specifiedNotes: 3. Measured under thermal equilibrium and dc (I ZT) test conditions.4. The Zener impedance is derived from the 60 Hz ac voltage which results when an ac current having an rms value equal to10% of the Zener current (I ZT or I ZK) is superimposed on I ZT or I ZK. Zener impedance is measured at two points to insure asharp knee on the breakdown curve and to eliminate unstable units.Notes: 5. *Add "-A" or "-T" to the appropriate type number in Table 1. Example: 6.2V Zener = 1N4735A-A for ammo pack. 6. For packaging details, visit our website at /datasheets/ap02008.pdf00.20.40.60.81.004080120160200P , T O T A L P O W E R D I S S I P A T I O N (W )d T , AMBIENT TEMPERATURE ( C)A Fig.1 Power Dissipation vs Ambient Temperature0250515202530l, Lead Length (mm)Fig. 2 Typical Thermal Resistance vs. Lead Length10200501001501101001000110100V , ZENER VOLTAGE (V)Z Fig. 4 Typical Zener Impedance vs. Zener Voltage1101001000102030405060C ,D I O DE C A P A C I T A N C E (pF )j V , ZENER VOLTAGE (V)Z Fig.3, Junction Capacitance vs Zener Voltagef = 1MHz T = 25CA V = 0V R V = 2V R V = 5V R V = 20VR V = 30VR Ordering Information(Note 6)IMPORTANT NOTICEDiodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to any product herein. Diodes Incorporated does not assume any liability arising out of the application or use of any product described herein; neither does it convey any license under its patent rights, nor the rights of others. The user of products in such applications shall assume all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on our website, harmless against all damages.LIFE SUPPORTDiodes Incorporated products are not authorized for use as critical components in life support devices or systems without the expressed written approval of the President of Diodes Incorporated.。
473贴片电阻-概述说明以及解释
473贴片电阻-概述说明以及解释1.引言1.1 概述贴片电阻是一种常用的电子元件，广泛应用于电路板和电子设备中。
它是一种小型、方便安装和焊接的表面贴装电阻，具有较高的稳定性和精确的阻值。
相比传统的插件电阻，贴片电阻具有体积小、重量轻、可靠性高等优点。
贴片电阻的工作原理很简单，它通过电阻材料的阻值来限制电流的流动。
当电流通过贴片电阻时，会产生与电阻值成正比的电压降。
在电子电路中，贴片电阻常用于调节、分压、限流等功能。
在电子行业中，贴片电阻有着广泛的种类和规格。
根据其尺寸不同，常见的贴片电阻尺寸有0603、0805、1206等。
这些数字代表了电阻的长宽尺寸，比如0603表示长度为0.06英寸、宽度为0.03英寸。
此外，贴片电阻还有不同的阻值范围可供选择，从几欧姆到几兆欧姆都有。
贴片电阻在各个领域都有广泛的应用。
在通信领域，贴片电阻常用于通信设备和无线电设备中，起到信号传输和干扰抑制的作用。
在消费电子产品中，贴片电阻被广泛应用于手机、电视、音响等电子设备中，保证设备的正常运行和高品质音视频效果。
此外，贴片电阻还用于计算机、医疗器械、汽车电子等行业，为各种电子设备提供稳定的电阻功能。
综上所述，贴片电阻作为一种重要的电子元件，具有小巧、稳定、精确的特点，广泛应用于通信、消费电子、计算机等领域。
随着电子技术的不断发展，贴片电阻将继续发挥重要作用，并在尺寸、功耗、阻值范围等方面不断创新和改进。
因此，对于工程师和电子爱好者而言，深入了解和掌握贴片电阻的相关知识是非常有必要的。
1.2文章结构文章结构部分内容可以如下编写：文章结构：本文将围绕着473贴片电阻展开讨论，文章主要分为引言、正文和结论三大部分。
引言部分将首先对贴片电阻进行概述，介绍其定义、原理和应用领域等基本信息，为读者提供一个整体的认识和理解基础。
接着，文章将详细介绍本文的结构，即各个章节的内容安排和主要讨论的点，以便读者可以清楚地了解文章的组织结构和主旨。
BD4723资料
BD47XXG seriesHigh-accuracyLow current consumption BD47XXG is a series of RESET ICs developed to prevent system error at transient state when the power of CPU and logic circuit switches ON/OFF or shutdown. These ICs consist of Power, GND, and reset output to detect power supply voltage of various systems and to output reset signal. These ICs are more practical for portable products because of their ultra-small package and low current consumption.Description1) Detection voltage: 0.1V step line up 1.9~4.6V(Typ.)2) High-accuracy voltage detection Vs ±2%(Max.)3) Low current consumption4) "L" reset output of open collector 5) Small SMP5 package FeaturesPortable products, Equipments with CPU and logic circuit ApplicationsSeries characteristicsGeneral-purposeRESET ICAbsolute Maximum Ratings(Ta=25˚C)Application Circuit*2 TPHL : Vcc=(Vs typ.+0.4V)Æ(Vs typ.–0.4V)Electrical characteristics Timing waveform Transfer delay time measurement circuitVCCVOUTVS0V VS+VCCNote) The ratings shown above indicate breakdown limit of the pin and should not be regarded as the values that guarantee the operation.* Derating : 1.5mW/˚C for operation above Ta=25˚CCharacteristic diagram and Measurement circuit (When BD4729G is measured.)I c c (µA )Vcc (V)Current consumptionOperating limit voltage'L' output currentI/O characteristicNCV o u t (V )Vcc (V)V o u t (m V )Vcc (V)V o u t (m V )Iol (mA)Setting of the RESET signal delay timeDelay time can be set by capacitor C L and resistance R L connected to the output pin as shown below.CL is charged by R L when Vcc is rising. The delay time caused by charging is determined by thetime constant of C L, R L and the threshold voltage of RESET pin. RESET IC discharges C L forcedly when Vcc is falling. The delay time of RESET signal is determined by adding the delay time of single RESET IC to each time.VCCRESET(=VOUT)VS0VVOLVS+Marking Voltage Part No.Part No.Part No.Marking MarkingVoltage VoltageBD4719BABBBCBDBEBFBGBHB3BJ1.9V2.0V2.1V2.2V2.3V2.4V2.5V2.6V2.7V2.8VBKBLBMBNB4BPBQBRBSBT2.9V3.0V3.1V3.2V3.3V3.4V3.5V3.6V3.7V3.8VBUBVBWBXBYBZB1B23.9V4.0V4.1V4.2V4.3V4.4V4.5V4.6VBD4729BD4720BD4721BD4722BD4723BD4724BD4725BD4726BD4727BD4728BD4730BD4731BD4732BD4733BD4734BD4735BD4736BD4737BD4738BD4739BD4740BD4741BD4742BD4743BD4744BD4745BD4746 Part number and Marking of samplesAppendixAbout Export Control Order in JapanProducts described herein are the objects of controlled goods in Annex 1 (Item 16) of Export Trade ControlOrder in Japan.In case of export from Japan, please confirm if it applies to "objective" criteria or an "informed" (by MITI clause)on the basis of "catch all controls for Non-Proliferation of Weapons of Mass Destruction.Appendix1-Rev1.0。
JB4732钢制压力容器分析设计应力分类过程简介[1]
![JB4732钢制压力容器分析设计应力分类过程简介[1]](https://img.taocdn.com/s3/m/40e063b2102de2bd97058836.png)
（4）对于线性化后的应力根据标准释义中的相关规定 区分一次总体薄膜应力，一次局部薄膜应力，一次弯 曲应力，二次应力和峰值应力，并分别校核；
JB4732钢制压力容器分析设计应力分类过程简介
10
实例:球形封头裙座应力分析
校核线0-0通过筒体最大应力处，方向沿壁厚方向，远 离结构不连续处。
圆筒壳体薄膜应力理论解： Pm＝PR/S ＝146.7MPa 与有限元结果相对误差为2.7%
球壳薄膜应力理论解： Pm＝PR/2S ＝122.1MPa 与有限元结果相对误差为0.2%
路径
MEMBRANE
MEM＋BEND
0-0
150.6
JB4732钢制压力容器分析设计应力分类过程简介
3
（一）一次应力 P
——平衡外加机械载荷所必须的应力 基本特征：非自限性
一次总体薄膜应力Pm 容器总体范围内存在 一次弯曲应力Pb 沿壁厚成线性分布的应力 一次局部薄膜应力PL
在结构不连续区产生的薄膜应力 JB4732钢制压力容器分析设计应力分类过程简介
图1 反应器结构简图 JB4732钢制压力容器分析设计应力分类过程简介
图2 裙座应力计算模型
11
应力分析结果：
（JB4732采用第三强度理论）
0-0
1-1
JB4732钢制压力容器分析设计应力分类过程简介
12
校核线1-1：
校核线1-1通过球壳与筒体连接位置，方向沿壁厚方向。 此处由于结构连续可能会产生较大的应力强度。之后 对校核线的应力分布做等效线性化处理。
(5)
峰值应力强度 S （由P +P Ⅴ JB4732钢制压力容器分析设计应力分类过程简介
IN4732A中文资料
For BZXyy series: Voltage rating 5.0 Third Line: Device name - For 1Nxx series: 7th to 8th characters of the device name.
4.085
4.3
4.515
4.465
4.7
4.935
4.845
5.1
5.355
5.32
5.6
5.88
5.89
6.2
6.51
6.46
6.8
7.14
7.125
7.5
7.875
7.79
8.2
8.61
8.645
9.1
9.555
9.5
10
10.5
10.45
11
11.55
11.4
12
12.6
12.35
13
13.65
1N4753A 1N4754A 1N4755A 1N4756A 1N4757A
1N4758A 1N4759A 1N4760A 1N4761A 1N4762A
1N4763A 1N4764A
Line 1
LOGO LOGO LOGO LOGO LOGO
LOGO LOGO LOGO LOGO LOGO
LOGO LOGO LOGO LOGO LOGO
1N4733A 1N4734A 1N4735A 1N4736A 1N4737A
BK4832规格书V0.2
BK4832 对讲机射频功率放大器 1 概述BK4832 是一款单片集成的高增益、高效率 的射频功率放大器芯片。
DL473-1992大直径三通锻件技术条件(pdf 6页)
4.9 超声波检查
6.3 / 4.9.1 超声波探伤应在锻件最终热处理后进行，探测工作表面的粗糙度为 ∇ 。
4.9.2 锻件经超声波检查，单个缺陷等级为Ⅱ级，密集区缺陷等级为Ⅰ级，低波降低量不得 超过Ⅰ级。
5 试验方法
5.1 锻件化学分析用试样的采取按三通锻件在三个端面各取一个试样，筒形锻件在两个端面
告和无损探伤报告等资料。
4.8 金相检查 4.8.1 锻件应不存在白点。 4.8.2 锻件材料中的非金属夹杂物采用 GB10561 评级图Ⅱ，A、B、C 和 D 四类夹杂物均不 大于 2 级。 4.8.3 锻件的晶粒度不低于 4 级，且级差不大于 3 级。 4.8.4 锻件的金相组织不允许有部分超过 AC1 的回火组织，对 12Cr1MoV 不允许有黄块马氏 体组织。
中华人民共和国电力行业标准 大直径三通锻件技术条件
DL 473-92
中华人民共和国能源部 1992-06-30 批准
1992-12-01 实施
1 主题内容与适用范围 本技术条件规定了大直径三通锻件的订货条件、技术要求、试验方法和验收。 本标准适用于管道公称外径不小于 400mm 的 300MW 及以上火力发电机组管道三通锻
S
P
Cr Mo
V Cu Ni
0.08～ 0.30～
≤ ≤ 2.00～ 0.90～
≤≤
12Cr2Mol
≤0.50
—
0.15 0.60
0.030 0.030 2.50 1.10
0.20 0.30
0.08～ 0.40～ 0.17～ ≤ ≤ 0.90～ 0.25～ 0.15～ ≤ ≤ 12Cr1MoV
0.15 0.70 0.37 0.035 0.035 1.20 0.35 0.30 0.20 0.30
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BD47XXG series
High-accuracy
Low current consumption BD47XXG is a series of RESET ICs developed to prevent system error at transient state when the power of CPU and logic circuit switches ON/OFF or shutdown. These ICs consist of Power, GND, and reset output to detect power supply voltage of various systems and to output reset signal. These ICs are more practical for portable products because of their ultra-small package and low current consumption.
Description
1) Detection voltage: 0.1V step line up 1.9~4.6V(Typ.)2) High-accuracy voltage detection Vs ±2%(Max.)3) Low current consumption
4) "L" reset output of open collector 5) Small SMP5 package Features
Portable products, Equipments with CPU and logic circuit Applications
Series characteristics
General-purpose
RESET IC
Absolute Maximum Ratings(Ta=25˚C)
Application Circuit
*2 TPHL : Vcc=(Vs typ.+0.4V)Æ(Vs typ.–0.4V)
Electrical characteristics Timing waveform Transfer delay time measurement circuit
VCC
VOUT
VS
0V VS+VCC
Note) The ratings shown above indicate breakdown limit of the pin and should not be regarded as the values that guarantee the operation.
* Derating : 1.5mW/˚C for operation above Ta=25˚C
Characteristic diagram and Measurement circuit (When BD4729G is measured.)
I c c (µA )
Vcc (V)
Current consumption
Operating limit voltage
'L' output current
I/O characteristic
NC
V o u t (V )
Vcc (V)
V o u t (m V )
Vcc (V)
V o u t (m V )
Iol (mA)
Setting of the RESET signal delay time
Delay time can be set by capacitor C L and resistance R L connected to the output pin as shown below.
CL is charged by R L when Vcc is rising. The delay time caused by charging is determined by the
time constant of C L, R L and the threshold voltage of RESET pin. RESET IC discharges C L forcedly when Vcc is falling. The delay time of RESET signal is determined by adding the delay time of single RESET IC to each time.
VCC
RESET
(=VOUT)
VS
0V
VOL
VS+
Marking Voltage Part No.Part No.Part No.
Marking Marking
Voltage Voltage
BD4719
BA
BB
BC
BD
BE
BF
BG
BH
B3
BJ
1.9V
2.0V
2.1V
2.2V
2.3V
2.4V
2.5V
2.6V
2.7V
2.8V
BK
BL
BM
BN
B4
BP
BQ
BR
BS
BT
2.9V
3.0V
3.1V
3.2V
3.3V
3.4V
3.5V
3.6V
3.7V
3.8V
BU
BV
BW
BX
BY
BZ
B1
B2
3.9V
4.0V
4.1V
4.2V
4.3V
4.4V
4.5V
4.6V
BD4729
BD4720
BD4721
BD4722
BD4723
BD4724
BD4725
BD4726
BD4727
BD4728
BD4730
BD4731
BD4732
BD4733
BD4734
BD4735
BD4736
BD4737
BD4738
BD4739
BD4740
BD4741
BD4742
BD4743
BD4744
BD4745
BD4746 Part number and Marking of samples
Appendix
About Export Control Order in Japan
Products described herein are the objects of controlled goods in Annex 1 (Item 16) of Export Trade Control
Order in Japan.
In case of export from Japan, please confirm if it applies to "objective" criteria or an "informed" (by MITI clause)
on the basis of "catch all controls for Non-Proliferation of Weapons of Mass Destruction.
Appendix1-Rev1.0。