Third Party Inspection for Valve - Procedure

The Third Party Inspection for Valve article provides you with a sample valve inspection and valve testing procedure in the manufacturing shop. It is particularly suitable for the inspection of Gate, Globe, Ball and Check Valves. This article should be reviewed in conjunction with61beplay体育 valve inspection and test planarticles.

This content guides you through all necessary stages in the production of the industrial valves, including the inspection of manufacturing material, casting, fabrication, dimensional inspection,NDE,最终检查,保存beplay体育官网电脑,packing, and dispatch to site.

您需要考虑到这一点:本文是为典型阀门编写的,并且可能没有针对特殊情况详细介绍。

所有阀门检查和测试均beplay体育官网电脑针对批准的图纸,采购订单规格,购买者或公司标准,以及在国家,州或省的实践和规则以及任何政府法令,法律,法规,法规或法规中进行的。

As a general guide, all valves over 8" NB will normally be individually witnessed on test. With very large or special valves, such inspection may be extended to detailed component inspection of major components.

这种细节检查将始终适用于beplay体育官网电脑用于高压蒸汽,低温,核或其他关键服务的阀门,在这种情况下,将延伸至小于8英寸NB的阀门。

在施工过程中的阀门的适用代码和规格是:

  • Design code
  • Purchase order specification
  • 购买者的标准
  • 批准的图纸

适用的代码和标准是:

  • API 598
  • API 6D
  • API 594
  • ASME / ANSI B16.5
  • API 600、602、603、604

适用的代码和标准可能基于其他国际标准。该内容是一般的,即使设计代码与API代码不同,也可能有用。

第三方检查员审查的所需文件:

The list of documents normally is agreed upon in the Pre-Inspection meeting, which is held several weeks before the actual commencement of the inspection work.

参加这次会议的当事方是制造商,购买者和third party inspection agencyrepresentatives.

This is already explained in the Inspection and Test Plan for Valve article.

These are the list of documents that are normally agreed upon to be presented to the inspector:

Third Party Inspection for Valve - Material Inspection

The first actual inspection work in the valve is the materials inspection.The original or authenticated copies of mill certificates of material normally are available at the manufacturer's premises.

The third party inspector examines thesecertificatesfor compliance with specifications, and where appropriate, drawings.

评论包括:

  • 证书号码。
  • Heat or cast No.
  • 化学成分。
  • Mechanical properties.
  • Heat treated condition.
  • NDEapplied and results.
  • Surface finish

This covers body stem material, shell material, trim materials, gland materials, anti-friction materials, ball, wedge or flap materials, operating components, support material, well end, flanges and any other specified component.

然后,检查员目睹了针对材料标记的证书上的材料识别。还必须使用阀绘图数据表,材料列表和其他规格来检查它们。

Visual inspection for surface finish and probable defects is done and dimensional compliance with specification need to be controlled, as well.

When third party inspector carries out the material inspection, then provides the inspection visit report (IVR), the report contains the following items:

  • 确认令人满意的文件审查
  • Record of the endorsement of certification reviewed/witnessed
  • Record of all non-conformities
  • 目睹的任何测试的记录和结果

Third Party Inspection for Valve -Welding Inspection

当瓦尔ve material inspection is carried out, and the results were satisfactory ornon-conformitieswere closed by remedial action, then the valve manufacturer will start fabrication.

Thethird party inspector根据检查和测试计划(ITP)在阀门上检查以下几点,该计划已经在购买者和阀制造商之间达成协议。beplay体育官网电脑

The inspection scope is determined in the ITP. Some purchasers prefer to have stringent controls and assign the TPI for more “hold or witness points“为了进行检beplay体育官网电脑查和测试活动,其他一些则更喜欢“持有或见证点”,并在“评论文档”中分配更多的TPI。

这取决于检查预算,purchbeplay体育官网电脑asers assign for inspection. Much more inspection will have a much larger cost and less risk, and conversely, less inspection will have less cost but more risks.

The third party inspector carries out visual and dimensional check to ensure compliance with WPS and specification. Where specified, weld bevels need to be examined by MT or PT after grinding/machining.

Edges and weld bevels need to be clean, dry and free from surface defects,laminations, cracks, voids, notches, etc.

These are causes for rejection unless suitable/satisfactory remedial action can be taken. Welding repairs to bevels are not permitted, without approval from the client. Inspectors need report excessive or serious defects.

当第三方检查员对阀焊接进行检查时,请考虑以下项目:beplay体育官网电脑

  • 清洁度和准备的精度。
  • Roundness of form of components.
  • Application of preheat.
  • 焊接正在进行中。
  • 清洁焊缝。
  • 完成测试优惠券(指定)
  • NDE. Results shall meet specifications or code requirements.
  • 硬度测试 - 合同中指定
  • 影响测试 - 合同中指定

Third Party Inspection for Valve - Post Weld Heat Treatment

第三方检查员按规定执行尺寸检查和PWHT控制。PWHT完成后,可以使用便携式硬度测量来确定材料,热影响区或焊缝的硬度。

第三方检查阀 - 视觉和beplay体育官网电脑尺寸检查

第三方检查员控制以下几点:

  • To verify that the model and various features and components comply with the purchase order description and valve specification and drawings as applicable.
  • To verify that the dimensions of valves, flanges, flange drilling, bore, stem, threading, wall thickness and any other dimensions, as applicable, comply with the requirements of the specification and other.
  • 见证所需的压力测试。
  • Witnessing functional test of actuator on valve, when actuators are specified.
  • 影像学检查和otherNDEin accordance with the applicable references noted above.

Third Party Inspection for Valve - Low Pressure Air Test

如果合同或采购订单的要求,第三方检查员证人low pressure air test和pays attention to the following points:

  • 座椅,密封,旁路等的专门测试可能是required by purchase order.
  • A minimum of 2 gauges with correct working ranges are used. The calibration of the gauges needs to be checked.

Third Party Inspection for Valve - Hydrostatic Testing

The third party inspector checks all previous items have been accepted by authorised bodies and witness hydrostatic test and verify following points:

  • Body tests,high pressure closure tests,back seat testsas detailed in applicable procedure and code specification.
  • 校准状态和correct working ranges of gauges. A minimum of 2 pressure gauges are attached to item under test.
  • Adequate provision for venting of high points and draining of the test medium are provided.
  • 测试pressure is applied as directed by procedure or code until test limiting pressure is reached. During hold period, a methodical check for leaks is conducted.
  • 测试pressures, metal and water temperatures are recorded.
  • 水质是指规定的。

These test normally are on "Hold Point" or "Witness Point"

Third Party Inspection for Valve – Post Hydrostatic Testing

  • 降压后,阀成分被排干并干燥以满足指定的要求。
  • Stamping of Inspection authority stamps, are carried out in approved area, as required by client/code.
  • Stamps used need to be low stress type.
  • Application of desiccant/preservative need to be as directed in client's specification.

Third Party Inspection for Valve – Final Inspection

All valves need to be checked for cleanliness and dryness by third party inspector. Nozzle, outlets, flanged or butt welded, saddle, bracket locations and orientations against assembly drawings are controlled and operation of valve indicator and correct functioning also be checked.

Third Party Inspection for Valve - Name Plate Checking

第三方检查员根据批准的图纸和规格检查内容,并确保按照代码要求对其进行盖章。

Third Party Inspection for Valve -绘画和涂层

Surface preparation for painting is checked for the following points, according to specification by third party inspector:

表面状况需要不受针孔,延伸损坏和其他不连续性。

阀门的第三方检查 - 备beplay体育官网电脑件,宽松的物品和配件

Spare parts, loose items and accessories are checked visually for their dimensions, materials, workmanship and quantity, according to the purchase order specification.

测试marks and tags are checked for correct identification.

第三方检验阀-报告:beplay体育官网电脑

TThe third party inspector provides an Inspection Visit Report (IVR) after each visit, as well as a final report summarizing the activities carried out during the valve production in accordance with the contract requirements and circulated within the time limits specified in the contract.

该报告的格式是客户要求的,清楚地表明了对阀门的最终认可或拒绝。

第三方检查阀 - 发行说beplay体育官网电脑明:

当合同或采购订单的要求时,发行票据由third party inspection agency并在接受阀时给予制造商。

Third Party Inspection for Valve - Packing, Marking and Shipping:

第三方检查员检查以下几点:

Third Party Inspection for Valve - Final Book (Dossier)

The following final documents are reviewed and signed off by the third party inspector:

作为构建图纸,Manufacturer's data reports,Material certificate or certified mill test reports for all pressure parts,Material list or map,每个焊缝的焊工记录,Heat treatment records (Temperature-time record chart during PWHT),Dimensional record,NDE records,气动测试记录,Hydrostatic test record,Hardness test record,Final assembly checks,标记检查报告,beplay体育官网电脑打包清单,Spare parts list

还给Third Party Inspection

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