DLSS Heat Exchanger Tubes Straight Heat Exchanger Tubes

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.

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.

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.

Straight Tube Manufacturing & Surface Options

Seamless Tubes

Seamless construction for materials and specifications requiring cold-drawn, cold-finished or other applicable seamless manufacturing routes.

Welded Tubes

Welded tubes available where permitted by the governing material standard and project specification.

Heat-Treated Tubes

Annealed, solution-annealed or grade-specific heat treatment according to the applicable standard.

Pickled / Clean Surface

Controlled surface condition for corrosion-resistant alloy projects.

BA / EP Surface

Bright annealed or electropolished surface options for applicable stainless steel projects requiring enhanced cleanliness and controlled surface finish.

Cut-to-Length

Project-specific fixed lengths prepared according to exchanger fabrication requirements.

Long Length Straight Heat Exchanger Tubes

Maximum practical length should be confirmed from the actual material, dimensions, manufacturing route and logistics plan rather than treated as one universal value for all tube grades.

Long-length straight tubes are required in large heat exchangers and condenser bundles where the equipment design calls for extended tube lengths and reduced tube joints.

DLSS can review long-length requirements according to:

Material grade
Product standard
Outside diameter
Wall thickness
Required length
Length tolerance
Straightness
Heat treatment
NDE requirements
Packing method
Container or breakbulk transportation

Testing, Inspection & Documentation

ET

Eddy Current Testing

UT

Ultrasonic Testing

PMI

Positive Material Identification

Hydro

Hydrostatic Testing

Dimensional Inspection

OD / WT / Length

Documentation

Reports & Certificates EN 10204 3.1 / 3.2

Project Documentation Support

Complete documentation for seamless approvals and traceability.

Why DLSS for Straight Heat Exchanger Tubes?

Wide Material Range

SS · Duplex · Ni · Ti · CuNi

Custom & Long Length

OD · WT · Min WT · Length

Long Length

Extended tube supply

Heat Exchanger Focus

Built for exchanger projects

Inspection & 3.2

ET · UT · PMI · Hydro · TPI

FAQ

What materials are available for straight heat exchanger tubes?

DLSS supplies straight tubes in stainless steel, duplex, super duplex, nickel alloy, titanium, copper alloys, carbon steel and selected alloy steel grades.

Can you supply long-length straight tubes?

Yes. Long-length requirements can be reviewed according to the material, OD, wall thickness, required length, straightness, inspection and transportation conditions.

Can tubes be supplied to minimum or average wall thickness?

Yes, where permitted by the applicable product standard. The required wall basis should be clearly stated in the RFQ.

What testing can be arranged?

Testing may include ET, UT, hydrostatic testing, PMI, dimensional inspection and third-party inspection according to the applicable material standard and project specification.

Can EN 10204 3.2 documentation be arranged?

Yes. EN 10204 3.2 requirements can be arranged when specified and agreed as part of the inspection plan before production.

Straight Heat Exchanger Tube Technical Resources

Tube OD Tolerance

Understand outside-diameter requirements and tubesheet fit.

Wall Thickness Tolerance

Understand wall variation and acceptance requirements.

Tube Length Tolerance

Length-control requirements for exchanger fabrication.

Minimum WT vs Average WT

Understand the difference before placing the purchase order.

Heat Exchanger Tube Material Selection

Compare material families according to service conditions.

Tube-to-Tubesheet Expansion

Engineering considerations for expanded tube joints.