Straight Heat Exchanger Tubes
Straight tubes for shell & tube heat exchangers, condensers, evaporators, coolers and industrial heat-transfer equipment.
DLSS supplies straight heat exchanger tubes in stainless steel, duplex, super duplex, nickel alloy, titanium, copper alloys, carbon steel and selected alloy steel grades, with project-specific dimensions, long lengths, surface conditions and inspection requirements.
From standard exchanger tubing to special-alloy and long-length projects, tube requirements are reviewed according to the material grade, governing standard, OD, wall thickness, length, wall basis, heat treatment and inspection specification.
- Wide Material Range — Stainless · Duplex · Nickel · Titanium · Copper Alloy · Carbon Steel
- Custom Dimensions — OD · WT · Length · Minimum / Average WT
- Long Length Support — Project-Specific Extended Tube Lengths
- Inspection Support — ET · UT · Hydro · PMI · TPI
Material Options
Carbon Steel to Titanium & Nickel Alloys
Custom Tube Length
Fixed · Cut · Long Length
Wall Requirement
Minimum WT · Average WT where applicable
Inspection & Documentation
NDE · Dimensional · EN 10204 3.1 / 3.2
Straight Tubes for Heat Exchanger and Condenser Fabrication
Straight heat exchanger tubes form the primary heat-transfer surface in many shell & tube heat exchangers, condensers, evaporators and process coolers.
Depending on the exchanger design, straight tubes can be installed between tubesheets or incorporated into removable and replacement tube bundles.
The performance and fit of a straight tube depend on more than the material grade. Critical purchasing parameters include:
Outside diameter · Wall thickness · Minimum or average wall basis · Tube length · Length tolerance · Straightness · Surface condition · Heat treatment · Tube-end condition · Tube-to-tubesheet fit · Applicable product standard · Inspection and documentation requirements
DLSS supports straight-tube projects from technical specification review through manufacturing, inspection, documentation, packing and international delivery.
Dimensional Control
OD, wall thickness, length and straightness.
Material Traceability
Grade, heat number and material documentation.
Custom Tube Requirements
Special dimensions and project-specific lengths.
Inspection Support
NDE, pressure testing and third-party inspection where required.
Straight Heat Exchanger Tube Materials
Choose the material according to process media, corrosion conditions, temperature, pressure and project specification.
Stainless Steel
304/304L · 316/316L · 321 · 347/347H · 904LFor general process, chemical, refinery and industrial heat-transfer applications.
Duplex Stainless Steel
S31803 · S32205For chloride-containing and corrosion-critical process environments.
Super Duplex
S32750 · S32760For severe chloride, seawater and demanding corrosion service.
Nickel Alloy
400 · 600 · 625 · 800/800H · 825 · C22 · C276For demanding chemical, corrosion and high-temperature applications.
Titanium
Grade 2 · Grade 7 · Grade 12For selected seawater, condenser, desalination and chloride service.
Copper Nickel
C70600 · C71500For condensers, cooling-water systems and selected seawater applications.
Brass
C68700 · C44300For condensers, evaporators and selected cooling-water applications.
Carbon & Alloy Steel
ASTM A179 · Selected A213 T-SeriesFor heat exchangers, condensers and selected elevated-temperature heat-transfer service.
Critical Straight Tube Requirements
Outside Diameter
Tube OD must match the tubesheet drilling, expansion or welding design.
Wall Thickness
Wall thickness should be clearly specified together with the applicable tolerance and wall basis.
Minimum WT / Average WT
Different material standards use different wall-thickness conventions.
Length & Tolerance
Tube length affects exchanger assembly, tubesheet projection and final bundle fit.
Straightness
Straightness is particularly important for long tubes and tight-support-spacing exchanger bundles.
Tube Ends
Cut quality, burr removal, cleanliness and end protection should follow fabrication requirements.
Straight Heat Exchanger Tube Specifications
| Specification | Available Options |
|---|---|
| Material | Stainless / Duplex / Nickel / Titanium / Copper Alloy / Carbon & Alloy Steel |
| Construction | Seamless / Welded |
| Outside Diameter | Standard & Project-Specified |
| Wall Thickness | Standard & Project-Specified |
| Wall Basis | Minimum WT / Average WT |
| Length | Fixed / Cut / Customized Long Length |
| Straightness | Applicable Standard / Project Requirement |
| Tube Ends | Plain / Cut / Deburred / Protected |
| Surface | Pickled / Bright / BA / EP / Project-Specified |
| Heat Treatment | According to material and product standard |
| Inspection | ET / UT / Hydro / PMI / Dimensional / TPI |
| Documentation | MTC / EN 10204 3.1 / 3.2 / Inspection Reports |
| Packing | Bundles / Wooden Cases / Steel Frames / Project Packing |
Common Standards for Straight Heat Exchanger Tubes
Carbon Steel
ASTM A179 / ASME SA179
Seamless cold-drawn low-carbon steel heat-exchanger and condenser tubes.
Stainless Steel
ASTM A213 / ASME SA213
Seamless ferritic and austenitic alloy-steel heat-exchanger tubes.
ASTM A249 / ASME SA249
Welded austenitic steel boiler, superheater, heat-exchanger and condenser tubes.
ASTM A269
General-service stainless tubing; use only where appropriate to the project rather than treating it as the primary heat-exchanger standard.
Duplex & Super Duplex
Common base-tube specification for duplex tubing; final heat-exchanger requirements should follow the project specification.
ASTM A789 / ASME SA789
Seamless and welded ferritic/austenitic stainless steel tubing.
Nickel Alloy
ASTM B163
Seamless nickel and nickel-alloy condenser and heat-exchanger tubes.
Titanium
ASTM B338 / ASME SB338
Seamless and welded titanium and titanium-alloy tubes for condensers and heat exchangers.
Copper & Copper Alloy
ASTM B111 / ASME SB111
Seamless copper and copper-alloy condenser tubes.