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.
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
Cost vs Performance: Are
1. Introduction Power plants around the world rely on efficient condenser systems to maximize energy output and minimize downtime. Material choice for condenser tubes directly impacts operating costs and plant reliability. While stainless steel and copper alloys have traditionally been used, titanium pipes (Grade 2, ASTM B338) are increasingly recognized as the most cost-effective solution […]
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Alloy Steel Heat Exchanger
Introduction In high-temperature environments such as boilers, power plants, and petrochemical heat exchangers, alloy steel tubes are indispensable. One common choice is ASTM A199 T11, a Cr-Mo alloy steel that provides excellent creep resistance, mechanical strength, and durability. Recently, a customer requirement for T11 cold drawn tubes offers a valuable example of how this material […]
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How to Avoid Delays
For overseas buyers of stainless steel pipes, tubes, fittings, flanges, and alloy materials, shipment delay is more than a logistics problem. It can affect project installation, plant maintenance, commissioning schedules, and client commitments. In international steel pipe trade, delay can happen at many stages: specification confirmation, raw material preparation, production, inspection, document review, packing, customs […]
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ASTM B163 Incoloy 825
Product Details Chemical Composition of Incoloy 825 (UNS N08825) Element Composition (%) Nickel (Ni) 38.0 – 46.0 Chromium (Cr) 19.5 – 23.5 Iron (Fe) Balance Molybdenum (Mo) 2.5 – 3.5 Copper (Cu) 1.5 – 3.0 Titanium (Ti) 0.6 – 1.2 Carbon (C) ≤ 0.05 Incoloy 825 is a nickel-iron-chromium alloy with added molybdenum, copper, and titanium for enhanced corrosion […]
Read MoreTypical Special Requests from Our Customers
| 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
Yes. DLSS can support customized OD, wall thickness, length, bending radius, flange dimensions, and drawing-based production.
For special materials or replacement projects, DLSS can check stock, sample availability, or small-batch production based on the requirement.
Yes. DLSS can coordinate third-party inspection such as BV, SGS, TUV, LR, ABS, and DNV according to project requirements.
Please provide material grade, size, quantity, drawing, standard, inspection requirement, delivery time, and destination port.
For urgent replacement or maintenance projects, DLSS can help check stock, production feasibility, packing schedule, and air shipment options.
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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