Machining Fixed Tubesheet Heat Exchanger Evaporator

• Custom‑machined fixed‑tubesheet shell‑and‑tube evaporator; both‑end tubesheets rigid welded with shell cylinder, compact BEM‑type construction, optional expansion joint to absorb thermal differential stress between shell and tube bundle
• Precision CNC multi‑drilled forged tubesheet, strength‑welded or strength‑weld plus expanded tube‑to‑tubesheet joints; reliable sealing performance, low risk of fluid cross‑contamination for evaporation, vapor‑liquid separation and heat‑transfer duties
• Wide material selection for shell, tubesheet and heat‑exchange tubes: carbon steel for general service, stainless steel for moderate corrosion, duplex steel and titanium for chloride‑rich and seawater‑related evaporation process
• Complete in‑house service including thermal simulation calculation, mechanical strength verification, 2D/3D design, heavy machining, welding, assembly and full‑range pressure‑vessel non‑destructive testing, strictly manufactured per customer datasheet and CAD drawings
• Compliant with ASME Sec.VIII, TEMA BEM and GB/T151 pressure‑vessel specifications; third‑party witness inspection (SGS, TUV, BV) is acceptable
• Long‑term stable operation for chemical solvent evaporation, brine concentration, pharmaceutical evaporation, waste‑liquid recovery, refrigeration and new‑energy industrial evaporation systems

This machined fixed‑tubesheet heat exchanger evaporator belongs to classic BEM shell‑and‑tube pressure vessel equipment. Two fixed tubesheets are welded rigidly to both ends of shell cylinder; heat‑exchange tube bundle is assembled between two tubesheets. Medium completes evaporation and phase change heat transfer through wall conduction between tube‑side and shell‑side fluids. When large temperature difference exists between shell and tube bundle, a corrugated expansion joint can be installed on shell body to relieve thermal stress.

Core pressure‑bearing tubesheet adopts heavy forging and precision CNC multi‑spindle deep‑hole drilling, ensuring strict tolerance for hole pitch, aperture and perpendicularity; tube‑to‑tubesheet connection adopts strength welding or weld‑plus‑expansion composite process to prevent leakage under evaporation pressure fluctuation. Suitable for clean or moderately‑fouling process media; widely used as evaporator, vaporizer and reboiler for petro‑chemical, fine‑chemical, pharmaceutical, environmental‑protection brine‑treatment projects.

‑ Carbon Steel(Q245R, Q345R, A105):Economical pressure‑vessel steel grade, stable mechanical performance for non‑corrosive medium evaporation under medium‑temperature and medium‑pressure working conditions. ‑ Austenitic Stainless Steel(304 / 316L):Good resistance to weak acid, organic solvent and sanitary process fluid; fit for pharmaceutical, food‑grade and general corrosive evaporation conditions. ‑ Duplex Stainless Steel 2205:High yield strength, excellent chloride pitting and stress‑corrosion‑cracking resistance for brine and salt‑containing evaporation service. ‑ Titanium TA1 / TA2:Superior corrosion resistance for seawater, brine and wet chlorine‑containing media, ideal for high‑salinity evaporation process. ‑ Cr‑Mo Alloy Steel(F11, F22):High‑temperature creep‑resistant performance for high‑temperature and high‑pressure evaporation process in petrochemical industry.

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表格

‑ Pressure‑vessel Carbon & Alloy Steel: Q245R, A105, F11, F22, 12Cr2Mo1 ‑ Austenitic Stainless Steel: 304, 304L, 316, 321, 347 ‑ Duplex & Super Duplex: 2205, 2507 ‑ Nickel‑Base Alloy: Inconel 625, Hastelloy C276 ‑ Titanium Series: TA1, TA2

1. Rigid Fixed‑Tubesheet Compact Structure BEM fixed‑tubesheet layout maximizes tube quantity within limited shell diameter; compact footprint, simple assembly, less flange connections and low leakage risk for evaporation phase‑change working conditions.
2. Precision‑Machined Tubesheet & Reliable Tube Joints Forged tubesheet processed by CNC multi‑spindle simultaneous drilling; strength‑weld or weld‑plus‑expansion composite connection improves anti‑fatigue performance under evaporation pressure cyclic fluctuation. Expansion joint optional to eliminate large shell‑tube differential thermal stress.
3. Flexible Multi‑material Matching Diversified material combinations for shell, tubesheet and tube bundle, adapt for clean water, solvent, brine, weak‑acid and chloride‑containing evaporation media, balance corrosion resistance and project investment cost.
4. Full‑process Custom Engineering Capacity Complete workflow including thermal calculation, FEA stress simulation, mechanical design, heavy machining, welding, assembly and pressure test; fully customized according to customer process datasheet and CAD drawings.
5. Strict Pressure‑vessel‑grade Quality Control Full set of NDT inspection, hydro‑pneumatic test and helium leak detection for critical welding joints; full material traceability to meet international pressure‑equipment codes for global evaporation projects.

‑ Fine‑chemical industry: solvent evaporation and concentration process equipment ‑ Pharmaceutical industry: liquid medicine evaporation, concentration and distillation units ‑ Environmental‑protection & brine treatment: wastewater evaporation, high‑salinity brine concentration and recovery ‑ Petro‑chemical & refinery: process medium vaporizer and reboiler equipment ‑ Refrigeration & HVAC: industrial circulating fluid evaporation heat‑transfer system ‑ New‑energy material production: corrosive solution evaporation and concentration equipment

We provide integrated engineering design, heavy‑duty machining, welding, assembly and testing services, produce finished fixed‑tubesheet evaporator strictly according to customer CAD/PDF drawings and technical specification: ‑ Thermal simulation calculation, mechanical strength checking and 2D/3D model confirmation ‑ Shell cylinder rolling, forging tubesheet, CNC multi‑spindle deep‑hole drilling for tube‑hole array ‑ Heat‑exchange tube cutting, assembling, strength welding / expansion for tube‑to‑tubesheet joints ‑ Baffle plate processing, nozzle opening, flange assembly, expansion‑joint installation if required ‑ Welding procedure execution with certified WPS/PQR, post‑weld heat‑treatment as required ‑ Hydrostatic test, pneumatic tightness test, helium leak‑detection for critical sealing parts ‑ Surface blasting, painting, pickling passivation, sanitary polishing and protective covering before shipment

We supply custom‑made fixed‑tubesheet evaporator equipment for chemical, pharmaceutical, environmental‑protection and petro‑chemical clients worldwide.

‑ 100% UT Ultrasonic Testing for forging tubesheet and shell plate internal defects ‑ RT radiographic inspection for main shell butt welds; MT/PT inspection for surface and nozzle fillet welds ‑ PMI spectrometer full‑spectrum chemical‑composition analysis for each pressure‑bearing component batch ‑ Tensile, hardness and corrosion‑resistance test according to material specification ‑ High‑precision dimensional inspection for shell size, tubesheet hole pitch, flange flatness and nozzle position ‑ Hydrostatic pressure test and tightness leak test before delivery

Mill Test Certificate EN 10204 3.1, complete pressure‑vessel inspection documents can be provided before shipment. Third‑party inspection witness is available upon request.

‑ Inner packaging: waterproof plastic wrapping, desiccant added; protective cover for all nozzle openings, flange sealing surfaces and machined tubesheet face against scratch, dust and moisture corrosion ‑ Outer packaging: reinforced fumigated heavy‑duty wooden case or high‑strength steel‑frame crate for long‑distance sea transportation ‑ Custom special packaging available on customer request for oversized unit

Normally 35‑55 working days after receipt of advance payment. Exact delivery time depends on heat‑transfer area, equipment dimension, material grade, machining complexity and third‑party inspection schedule.