專案類型

• 立式與臥式熱交換器（壓力容器）

• 適用規範：ASME Boiler and Pressure Vessel Code
  Section VIII Division 1（2019 Edition）

專案背景

某設備製造廠承接立式與臥式熱交換器各一台之製造案件。
在專案初期，由於內部缺乏熱交換器相關設計與強度計算經驗，經第三方專業人員轉介，委託本工作室提供工程層面的設計合理性檢視與技術支援。

當時製造廠所提供之資料，主要包含：

• 結構配置圖（General Arrangement）

• 其餘設計依據與設計條件文件尚待補齊

在此狀態下，後續設計與製造作業，需仰賴清楚的工程假設與設計邏輯建立，以避免執行過程中產生理解落差。

面臨的工程議題

在設計與製造推進過程中，製造端針對部分關鍵結構（如法蘭與螺栓配置）提出設計適用性與合理性之疑問，希望能進一步確認其設計條件、計算依據與規範適用邏輯是否一致。

此階段的需求，已不僅是重新輸入數值計算，而是需要針對：

• 設計假設是否完整

• 設計條件與適用規範之一致性

• 計算結果在實務製造上的可行性

進行整體工程判斷與技術說明。

本工作室的支援內容

在本案中，本工作室提供之服務重點為工程判斷與設計合理性支援，主要包含：

1. 設計條件與文件邏輯整理

• 依既有結構配置，協助釐清設計前提與必要假設

• 協助建立可追溯之設計依據與計算邏輯架構

2. 關鍵結構設計之技術檢視

• 針對法蘭與螺栓設計進行獨立檢核

• 說明相關規範條文之適用原則與設計考量

• 協助製造端理解不同設計選項在工程上的影響，而非僅提供單一數值結果

3. 工程溝通與後續調整支援

• 以工程角度說明設計考量與可行方向

• 協助製造端將原有疑問，轉化為後續可執行之設計調整作業

後續互動情況

於數年後，該製造廠工程人員再次聯繫本工作室，針對原計算文件中之設備重量計算內容提出詢問。
本工作室即協助說明相關計算所在位置與技術說明，作為既有設計文件理解上的補充。

經驗說明與觀察

此案例反映了設備製造實務中常見的狀況，包括：

• 設計初期資料尚未完整定義

• 設計作業高度依賴工具計算結果

• 工程問題往往於製造或審查階段才被提出討論

在此類案件中，本工作室所提供的角色，並非單純計算服務，而是：

• 協助製造端釐清設計邏輯與規範適用原則

• 在設計已進行的情況下，提供可落地的工程判斷與調整建議

• 降低後續設計溝通與執行上的不確定性

適合的服務對象

• 設備製造商

• 壓力容器與熱交換器製造廠

• 需要設計合理性檢視或工程判斷支援之專案

Project Type

• Vertical and Horizontal Heat Exchangers (Pressure Vessels)

• Applicable Code: ASME Boiler and Pressure Vessel Code
  Section VIII, Division 1 (2019 Edition)

Project Background

A equipment manufacturer undertook the fabrication of one vertical and one horizontal heat exchanger.
At the early stage of the project, due to limited in-house experience in heat exchanger design and strength calculations, the manufacturer engaged our studio—through a referral from a third-party professional—for engineering-level design review and technical support.

At that time, the information provided by the manufacturer mainly included:

• General Arrangement drawings

• Other design inputs and design condition documents were yet to be fully established

Under such circumstances, subsequent design and fabrication activities required clear engineering assumptions and design logic to minimize misunderstandings during execution.

Engineering Issues Encountered

During the progression of design and fabrication, questions were raised by the manufacturer regarding the applicability and engineering rationale of certain key structural components, such as flange and bolting configurations.

The request at this stage was not simply to re-run calculations, but to perform an overall engineering review focusing on:

• Completeness of design assumptions

• Consistency between design conditions and applicable code requirements

• Practical feasibility of calculated results in fabrication and implementation

Scope of Our Engineering Support

In this project, our role was centered on engineering judgment and design rationality review, including:

1. Review of Design Conditions and Documentation Logic

• Assisting in clarifying necessary design premises and assumptions based on existing configurations

• Helping establish a traceable structure of design basis and calculation logic

2. Technical Review of Key Structural Components

• Independent technical review of flange and bolting design

• Explanation of relevant code principles and their application

• Supporting the manufacturer in understanding the engineering implications of different design options, rather than providing a single numerical outcome

3. Engineering Communication and Adjustment Support

• Providing technical explanations from an engineering perspective

• Assisting in translating identified concerns into actionable design adjustments for subsequent work

Subsequent Interaction

Several years later, engineers from the same manufacturer contacted our studio with questions regarding the equipment weight calculations contained in the original calculation package.
We assisted by indicating the relevant calculation sections and providing technical clarification to support understanding of the existing documentation.

Observations and Experience Summary

This case reflects common situations encountered in equipment fabrication practice, such as:

• Design inputs not being fully defined at early project stages

• Heavy reliance on calculation tools without sufficient emphasis on engineering assumptions

• Engineering questions often emerging during fabrication or review stages

In such cases, our role is not limited to numerical calculations, but rather to:

• Supporting manufacturers in understanding design logic and code application principles

• Providing practical engineering judgment and adjustment guidance when design work is already in progress

• Reducing uncertainty in subsequent design communication and executio

Suitable Applications

• Equipment manufacturers

• Pressure vessel and heat exchanger fabricators

• Projects requiring engineering design review or engineering judgment support