What this guide does
Use this guide to prepare a supplier-reviewed enquiry sheet, not to calculate universal sensor spacing or predict an installed meter’s accuracy. A nominal pipe designation is a useful identifier, but should not be substituted for the actual dimensions required by the selected instrument.
Endress+Hauser’s technical FAQ identifies pipe outside diameter or circumference, wall thickness, pipe and coating materials, coating thickness, and fluid acoustic data or fluid type and temperature as relevant inputs. Its liner discussion also calls for liner type and thickness. The source is linked below.
Give every dimension a defined boundary
Write “metal pipe outside diameter” beside the dimension rather than an unexplained “diameter”. Keep internal lining, external coating, insulation and any outer jacket in separate fields. A dimension measured across a jacket must be identified as such. State the units and where the value came from: a drawing revision, a documented field measurement or an unconfirmed estimate awaiting review. Ask the supplier how the selected instrument expects each layer to be entered.
A deliberately limited geometry example
Assume a circular metal pipe with an outside diameter of 120 mm, a uniform metal wall of 5 mm and a uniform internal liner of 2 mm on each side. For these definitions only:
- Fluid-bore diameter = 120 − 2 × 5 − 2 × 2 = 106 mm.
- Omitting the internal liner would give 110 mm.
- If the same hypothetical mean velocity were held fixed, the calculated area ratio would be (110 / 106)² = 1.0769, or approximately 7.69% higher.
These are invented teaching dimensions, not a customer pipe or product specification. The area comparison is a geometry-only thought experiment, not a predicted 7.69% clamp-on meter error. Real configuration changes can also affect acoustic-path and velocity calculations. Use the applicable manufacturer method for the selected device; do not turn this example into a correction factor.
Turn unknowns into review tasks
If the liner is undocumented, write “unknown” and request a suitable way to establish it before approving a configuration. If drawings and field records disagree, retain both references and ask for resolution rather than averaging them. Give fluid identity, intended conditions and the proposed location their own review fields. The project should also ask the supplier to confirm applicable pipe conditions and mounting requirements; no universal straight-run length or acceptable layer thickness is supplied here.
Keep the approved inputs with the handover
Archive the final input sheet, its evidence, the confirmed order configuration and the applicable instruction revision together. Record changes made during commissioning and who approved them. This gives a later replacement enquiry a defined starting point instead of a model name detached from its installation data.
Product and documentation review
The linked Endress+Hauser 9W4B Prosonic Flow W 400 entry is an international-brand product on the WESIVO website, not a WESIVO-manufactured clamp-on instrument. It is available as an enquiry reference; it is not a suitability, stock or delivery guarantee. The linked English operating instructions cover Modbus RS485. Ask for the documentation matching the complete requested version and receiving interface. The related water-supply case is a separately attributed KROHNE application, not a W 400 installation reference.
本文用于准备哪些资料
本文帮助整理供供应商审核的询价表，不用于计算通用探头间距或预测现场仪表精度。公称规格可以作为管道标识，但不能直接替代所选仪表要求的实际尺寸。
Endress+Hauser 技术问答将管外径或周长、壁厚、管材及涂层材质、涂层厚度，以及介质声学资料或介质类型与温度列为相关输入；其内衬说明也要求明确内衬类型和厚度。原始资料见文末。
每个尺寸都要写清边界
在数值旁注明“金属管外径”，不要只写一个含义不明的“直径”。内部衬层、外部涂层、保温和外护套分别填写。如果尺寸是在外护套上测得，应明确说明。记录单位及数据来源，例如图纸版本、有记录的现场测量，或尚待复核的估计值。请供应商说明所选仪表对各层参数的具体输入要求。
一个有明确限制的几何算例
假设金属圆管外径为 120 mm、均匀金属壁厚为 5 mm，内部均匀衬层每侧厚 2 mm。仅按这些定义计算：
- 介质流通内径 = 120 − 2 × 5 − 2 × 2 = 106 mm。
- 若漏掉内衬，则会得到 110 mm。
- 假设平均流速数值完全不变，两种截面积之比为 (110 / 106)² = 1.0769，即后者约高 7.69%。
这些尺寸仅用于教学，并非客户管道或产品参数。面积比较只是几何假设，不能据此预测外夹式流量计会产生 7.69% 误差。实际配置变化还可能影响声路和流速计算，应采用所选设备适用的厂家方法，不能把本例直接当作修正系数。
将未知信息变成待核对任务
没有内衬文件时，应填写“未知”，并在批准配置前寻求适合的方法确认。图纸与现场记录不一致时，保留双方来源并要求解决，不能直接取平均。介质身份、预期工况和拟安装位置应单独列项。还应请供应商确认适用管道条件及安装要求，本文不提供通用直管段长度或允许层厚。
把批准的输入资料一起交接
将最终输入表、数据依据、确认后的订货配置和适用说明版本放在同一档案内。记录调试时的参数修改及批准人。这样后续替换询价就有明确起点，而不是只留下一个脱离现场资料的型号名称。
产品与文件的核对入口
相关 Endress+Hauser 9W4B Prosonic Flow W 400 是 WESIVO 网站上的国际品牌产品入口，并非 WESIVO 制造的外夹式仪表。该入口用于询价参考，不代表适用性、库存或交期承诺。所附英文操作说明对应 Modbus RS485，应按所需完整版本和接收接口索取匹配文件。关联供水案例属于另行署名的 KROHNE 应用，不是 W 400 安装业绩。
Discuss your application
Send your medium, operating conditions, connection, output, quantity and destination. WESIVO will review the configuration before quotation.