Views: 0 Author: Site Editor Publish Time: 2026-09-21 Origin: Site
CSTHEATEXCHANGER manufactures shell and tube heat exchangers directly from customer drawings. We have just completed production of a build-to-drawing shell and tube unit, and this article explains exactly how we take a customer's drawing set (or a drawing-plus-datasheet package) through review, fabrication, testing and shipment. If you already have a drawing, you can send it to us and we will return a technical review and quotation; if you only have process data, we will prepare the drawing for you.
At CSTHEATEXCHANGER we build heat exchangers for water, steam, refrigerant, glycol, ammonia, CO2 and other process media, for both new installations and one-for-one replacement of existing equipment. Shell and tube units — including fixed-tubesheet exchangers, shell and tube evaporators, shell and tube condensers and U-tube bundles — are one of our core industrial product lines.
When a drawing set arrives, our engineering team runs a fixed review sequence. This is the part of the job that determines whether the exchanger will actually fit and perform, so we do not skip steps even on repeat orders.
Shell inside diameter, overall length and tube length
Nozzle sizes, ratings, orientation and face-to-face dimensions
Saddle or bracket positions and anchor-bolt pattern
Lifting lugs and clearance for bundle pull-out
Tube outside diameter, wall thickness and count
Tube pitch and layout pattern (triangular, rotated triangular, square, rotated square)
Baffle type, cut and spacing; tie rods and spacers
Tubesheet thickness and tube-to-tubesheet joint type (expanded, seal-welded, strength-welded)
Our shell and tube exchangers are built with tube bundles in copper, stainless steel, titanium, copper-nickel, brass or carbon steel, and shells in carbon steel or stainless steel. During review we confirm that every material called out on the drawing is compatible with the two fluids and with each other (galvanic pairs, chlorides, ammonia versus copper, and similar checks).
We check the stated design pressure, design temperature, corrosion allowance and hydrotest pressure against the applicable pressure-vessel code referenced on the drawing, and we confirm that the mechanical design classification (for example a TEMA class such as R, C or B) matches the intended service.
Even on a pure build-to-drawing job we re-run the thermal rating from the customer's process data. If the drawing cannot meet the stated duty, we tell the customer before production — not after commissioning.
The output of this review is a short technical report plus a marked-up drawing. Only after the customer signs off do we release the job to the shop.
There are three practical reasons plants and OEMs choose a build-to-drawing supplier rather than re-engineering from scratch:
Exact fit for replacement. When an existing exchanger fails, the piping, foundations and platform are already in place. A drawing-matched unit installs without modifying anything around it.
Faster approval cycle. With a drawing in hand, the review is a check rather than a design, so the time from inquiry to approved shop drawing is shorter.
Documented traceability. A drawing-based order gives the customer a complete record: approved drawing, material certificates, weld records and test report all tied to one revision.
CSTHEATEXCHANGER also supplies replacement tube bundles on their own — including U-tube bundles — when the shell is still serviceable and only the bundle needs replacing. The same drawing-review procedure applies.
If you want the fastest possible turnaround, send us as many of the following items as you have. Missing items are not a problem — we will fill the gaps — but each one you provide shortens the review.
Item | Why we need it |
|---|---|
General arrangement (GA) drawing with overall dimensions | Confirms footprint and nozzle interfaces |
Tubesheet layout / tube count | Defines heat transfer area and bundle weight |
Baffle drawing (type, cut, spacing) | Governs shell-side pressure drop and vibration |
Nozzle schedule (size, rating, orientation) | Ensures piping match |
Bill of materials with grades | Confirms corrosion compatibility |
Process datasheet (fluids, flow, inlet/outlet temperatures, pressures, fouling factors) | Allows thermal re-check |
Design code, design pressure/temperature, test pressure | Defines pressure-boundary calculations |
Photos or nameplate of the existing unit (for replacements) | Cross-checks the drawing against what is installed |
Send drawings in PDF, DWG or STEP format to info@cstheatexchanger.com.
Yes. We manufacture directly from customer drawings. We first perform a manufacturability and materials review, return a marked-up drawing for approval, and only then release the job to production.
We will carry out the thermal and mechanical design and prepare a full drawing package for your approval before fabrication. Please provide fluids, flow rates, inlet and outlet temperatures, operating and design pressures, and any footprint or nozzle constraints.
Tube bundles are commonly supplied in copper, stainless steel, titanium, copper-nickel, brass or carbon steel; shells in carbon steel or stainless steel. Other materials can be quoted on request.
Yes. Matching the shell diameter, tube length, nozzle positions and support locations is the standard scope of a build-to-drawing order. Where the original internals were under-performing, we can propose improvements to the bundle while keeping the external interfaces unchanged.
Yes. CSTHEATEXCHANGER supplies replacement straight-tube and U-tube bundles built to drawing, so a plant can reuse its existing shell.
We build shell and tube exchangers for water, steam, refrigerant, glycol, ammonia, CO2, thermal oils and other process media, across chemical processing, refrigeration, power generation, marine and food-processing applications.
Every unit is pressure tested to the test pressure stated on the approved drawing before shipment, and the test record is supplied with the material documentation.
If you have a shell and tube heat exchanger drawing — for a new unit, a one-for-one replacement, or a replacement tube bundle — send it to CSTHEATEXCHANGER and we will return a technical review and quotation. If you only have process data, we will prepare the drawing for you.
Email: info@cstheatexchanger.com
International business: +86 0519 8878 2189
Website: https://www.cstheatexchanger.com/
CSTHEATEXCHANGER — from your drawing to a tested, ready-to-install shell and tube heat exchanger.
