Piping Inspection

管道检验文章为您提供关于管道和管道在施工现场测试,以及在运转的工厂检验方面的信息。

什么是管道的定义是什么?

Based on API Code, the definition of pipe is a pressure-tight cylinder used to convey a fluid or to transmit a fluid pressure.

管道检查

If you look to the refinery or chemical plant, you can see the jungle of pipes which are connecting the vessels together. Statistic shows that 40 % of total mechanical failures in the units are因为的工艺管道。

本文为您提供关于工艺管道的现场检查以及信息的重要点在过程工厂在役检查。

什么是在施工现场的工艺管道检验要求?

对于工艺管道施工代码是ASME B31.3代码,它涵盖了设计,材料,制造,检验,测试和调试的最低要求。

With the above explanation, your inspection and test plan (ITP) for process piping needs to meet the requirements of ASME B31.3 Code.

ASME B31.3是指你对某些活动的其他ASME代码段。例如,对于焊接参考ASME代码段IX,管接头的设计和选择的ASME B16.5和用于无损检测到ASME规范第五节

该process piping design and construction is not under the ASME Code scheme of stamped items.

这意味着没有认证通过ASME建筑承包商,它是业主的责任,选择它的工艺管道建设工程资质和经验的承包商。

Ťhis is the reason that in the ASME B31.3 code you cannot see the wording of “Authorized Inspector,” and instead the words “owner inspector” have been used.

该owner inspector can be the owner's own qualified inspector or the inspector of a third party inspection company under contract with the owner.

纵观ASME施工规范,当你看到写着“授权检查,”你注意到有一个ASME邮票计划在那里。

Contrary to the ASME B31.3, the ASME B31.1 code for power piping (boiler external piping) have the ASME stamp scheme. The construction contractor must be certified by the ASME organization and must hold the “PP” stamp.

因此,在ASME B31.1检查的措辞是“授权检查员”,这意味着这个人有特定资格,并从NBIC佣金卡。

For more details, review thePressure Vessel Certification文章。对于电力管道承包商认证过程是类似的压力容器。

在建筑现场检查要求详细的工艺管道的检查和测试计划被寻址。

检验和试验计划for Process Piping

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What is In-Service Inspection Requirement for Process Piping?

为您的工艺管道的在役检查代码API STD 570。

代码的标题是管道检验规范:在役检查,评分,修理和管道系统的变化。

其他API推荐的做法和规范也是必要的与本规则一起使用。

管道检查

Some of these Recommend Practices are:

  • API RP 574检查实践管道系统部件,
  • API RP 577 Welding Inspection and Metallurgy,
  • API RP 571损伤机制影响固定设备在炼油行业,
  • API 578 Material Verification Program for New and Existing Alloy Piping Systems

ASME建设和引用的代码段也可以使用,如ASME B31.3和ASME规范第Ⅸ。

对于修复,API的要求STD 570,或ASME PCC-2需要得到满足。

ASME-PCC-2,这是第一次在2006年出版的标题是:“压力设备及管道的修复。”

该API 570 Piping Inspectors are qualified persons to do the piping system inspection.

API 570 Training Courseis 6 daysvideo trainingprogram and available online and is the Prep course for API 570 Piping nspector Exam. Besides the student that successfully pass this training course exam, receive I4I academy certificate with 48 hours training credit.

What are the Important Items in the Piping Inspection?

这些是唯一重要的点或工艺管道在役检查点的概要,并且不应当被假定为在整个管道的检查程序。

的管道的检查过程是一个综合文件,这就需要盖的检查方法中采用,设备和材料被使用,涉及检查人员的资格和检查活动的在最小的序列。

您可以使用下面的内容为点,为管道系统的在役检查的总结。

  • Creating a piping inventory list indicating the line number, pipe specification class, rating, schedule, pipe origin location (from) and pipe destination location (to)
  • 创建管道等距草图便于检查和腐蚀监测地点的记录(CMLS)
  • 除以整个单元管道联接到基于工艺条件和潜在的降解机制管道电路
  • 基于电路的损坏机构选择适当NDE技术为每个管道电路
  • 的CMLS点基于用于一般性或局部腐蚀和服务特定损伤机制的潜力管道等距草图判定betway GD真人
  • 失败和指令的基于管道服务类后果的测定API 570陈述或者基于基于风险的检验方法。
  • 进行腐蚀,泄漏外部检查,先前的临时修理,夹具,涂层击穿,绝缘损坏,振动,不对中,特别是在接触点,并在空气中于土壤接口管支承恶化,吊管变形或破裂和损坏卷曲
  • External thickness measurement on CMLs on each piping circuit
  • Corrosion rate calculation based on metal loss in a specific time interval
  • 基于所述minmium退休厚度计算所需厚度和最小所需的结构厚度
  • 基于用于腐蚀的可用厚度与腐蚀速率值剩余寿命计算
  • 基于管道电路检查间隔的测定剩余寿命计算以及管道服务类
  • 对于非稀疏损伤机理管道检查间隔的测定
  • 用适当的ND做辅助检查E method for piping circuits susceptible to creep cracking
  • 用适当的ND做辅助检查E method for piping circuits susceptible to the creep cracking
  • 用适当的ND做辅助检查E method for piping circuits susceptible to environmental cracking from Chloride SCC, Polythionic acid SCC, Caustic SCC, Amine SCC, Carbonate SCC, Hydrogen blistering and hydrogen induced cracking (HIC), etc.
  • 如果有必要的其他NDE方法的应用:
  1. PEC (pulsed eddy current), LRUT (long range UT), LREM (long range electromagnetics), RT for wall thickness loss, and CUI and neutron backscatter and infra-red thermography for detection of wet insulation
  2. MT(磁性粒子),WFMT(湿荧光磁粉),PT(渗透检测),EC(涡电流),UT剪切波,AUT(自动UT),TOFD(飞行衍射的时间),RT,ACFM(交流电场测量),AET(声发射),用于调查开裂
  3. 该rmography for detection of fouling and hot spots
  • 在沉积,腐蚀开法兰内部检查,局部腐蚀,侵蚀等。
  • Internal inspection of clad or lined piping for disbanding, bulging and cracking
  • Internal inspection of refractory lined piping for erosion, deterioration of anchors, undercutting of refractory and coke build up behind refractory
  • Flange joint inspection for distortion and leakage and flange face inspection, ring groove and gasket for corrosion, erosion , cracking and mechanical damage
  • Internal inspection of dismantled valve for corrosion, erosion, mechanical damage and cracking
  • Specific attention and internal inspection of critical check valves
  • 对局部腐蚀的注入点检验
  • Inspection of dead legs for corrosion
  • Corrosion under insulation inspection of piping in susceptible temperature (-12˚ to 175˚ C) either by advance NDT or by removal of insulation and making visual inspection
  • 作出适当的报告和报告中保存和实施适当的系统,以便快速访问记录

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