Special Offers for Hard-to-Find Materials & Custom Sizes

DLSS supports urgent, non-standard, and corrosion-resistant piping projects with special materials, custom sizes, and flexible inspection requirements.

DLSS Here We Help Special Offers

When Standard Sizes Are Not Enough

Many heat exchanger, shipbuilding, petrochemical, and maintenance projects require materials or sizes that are not easy to find from standard stock. DLSS helps customers handle special material grades, non-standard dimensions, urgent replacement orders, and project inspection requirements.

Urgent replacement and fast sourcing support

Nickel alloy, duplex, titanium, copper nickel available

Custom OD, WT, length, radius, and machining

TPI, PMI, UT, ET, HT, MTC 3.1/3.2 support

Special Materials We Support

Not sure which material is suitable? Send us your working temperature, medium, pressure, and drawing. Our team can help check the possible material options.

Stainless Steel

304 / 304L
316 / 316L
321 / 321H
347 / 347H
310S
904L

Duplex & Super Duplex

S31803 / 2205
S32205
S32750 / 2507
S32760
S31254 / 254SMO

Nickel Alloys

Inconel 600 / 625
Incoloy 800H / 825
Hastelloy C276 / C22
Monel 400
Alloy 20
Nickel 200 / 201

Titanium & Copper Alloys

Titanium Grade 2
C70600
C71500
C68700
C44300
C12200

Custom Sizes & Non-standard Requirements

Based on drawings or technical specifications

Requirement	DLSS Support
Outside Diameter	Custom OD according to project requirements
Wall Thickness	Thin-wall and thick-wall options
Length	Fixed length, random length, extra-long tubes
U Tube Radius	Custom bending radius based on drawing
Finned Tube Design	Low fin, spiral fin, corrugated tube options
Flange Size	Non-standard thickness, bore, length, facing
Tube Sheet	Drilling, machining, drawing-based production
Packing	Wooden case, bundle, export seaworthy packing

Special Supply for Heat Exchanger Projects

Heat Exchanger Tubes

Straight tubes for condensers, boilers, evaporators, and pressure equipment.

U Tubes

Custom bending radius, fixed leg length, stress relief heat treatment, and wooden case protection.

Low Finned Tubes

For heat transfer efficiency improvement in condensers, coolers, and boiler-related equipment.

Tube Sheets

Customized drilling, machining, material matching, and drawing-based production.

Flanges & Fittings

Matching flanges, elbows, reducers, tees, forged fittings, and project piping components.

For replacement projects, DLSS can help match the original material, size, inspection standard, and packing method to reduce project risk.

Inspection & Project Documents Available

Inspection / Document	Available Support
MTC	EN 10204 3.1 / 3.2
PMI	Positive Material Identification
UT	Ultrasonic Testing
ET	Eddy Current Testing
HT	Hydrostatic Test
Flattening / Flaring	For tube quality verification
Visual Inspection	Surface and dimension checking
TPI	BV, SGS, TUV, LR, ABS, DNV etc.
Packing Documents	Packing list, photos, marking, shipping documents

How DLSS Supports Special Projects

ASTM Standards for Nickel

1. Introduction When sourcing nickel alloy and titanium pipes for chemical plants, desalination projects, or power plants, compliance with ASTM standards is a key requirement. ASTM (American Society for Testing and Materials) specifications define the chemical composition, mechanical properties, testing, and delivery conditions for these critical materials. This article provides a complete overview of the […]

Choosing Between 304L, 316L,

Introduction When selecting stainless steel tubes for industrial use, choosing the right grade can significantly affect corrosion resistance, mechanical performance, and cost efficiency. Among the most widely used austenitic stainless steels are 304L, 316L, and 317L. Though they may appear similar, their chemical makeup and performance differ greatly in environments like chemical processing, marine applications, […]

New Growth Frontiers: Latin

Latin America (LATAM) is becoming an increasingly important region for stainless steel seamless tube suppliers—especially in the energy, mining, petrochemical, and food sectors. Countries like Brazil, Mexico, Argentina, and Chile are actively investing in infrastructure modernization, oil & gas projects, and renewable energy systems, all of which require heat exchangers, boilers, and industrial piping built […]

How to Specify U-Bend

Introduction U-bend stainless steel tubes are a critical component in shell and tube heat exchangers, designed to increase heat transfer area while optimizing space. These tubes must meet strict dimensional, metallurgical, and mechanical standards to perform reliably under thermal cycling and high-pressure environments. This article guides you through the key specifications and considerations when sourcing […]

Customer Request	DLSS Response
“We need nickel alloy tubes urgently.”	Check stock, mill schedule, and air shipment option
“The size is not standard.”	Review drawing and confirm production feasibility
“We need U tubes with fixed radius.”	Confirm radius, leg length, heat treatment, and packing
“The end user requires TPI.”	Coordinate BV, SGS, TUV, LR, ABS, or DNV inspection
“We only need a small quantity.”	Check sample, trial order, or small-batch support
“We need replacement tubes for an old exchanger.”	Match material, size, standard, and inspection requirements

FAQ

Can DLSS supply non-standard sizes?

Yes. DLSS can support customized OD, wall thickness, length, bending radius, flange dimensions, and drawing-based production.

Do you support small quantity orders?

For special materials or replacement projects, DLSS can check stock, sample availability, or small-batch production based on the requirement.

Can you arrange third-party inspection?

Yes. DLSS can coordinate third-party inspection such as BV, SGS, TUV, LR, ABS, and DNV according to project requirements.

What information should I provide for a special offer?

Please provide material grade, size, quantity, drawing, standard, inspection requirement, delivery time, and destination port.

Can DLSS support urgent air shipment?

For urgent replacement or maintenance projects, DLSS can help check stock, production feasibility, packing schedule, and air shipment options.

Do you provide material alternatives?

DLSS can help review the project condition and discuss possible material options, but final material selection should be confirmed by the project engineer or end user.

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