Heat exchanger tube
Heat exchanger tube in an extensive range of austenitic stainless steels, duplex stainless steels, nickel alloys, titanium and zirconium, suitable for all types of heat exchangers, such as seawater coolers, condensers, evaporators, heaters and reheaters.
Vil du vide mere?
Sandvik's heat exchanger tube program includes imperial and metric sizes, from outside diameter 12 mm up to 40 mm (0.472 to 1.575 in.). Special sizes can be made to order. Sandvik heat exchanger tube are supplied in straight lengths up to 30 meters, or as U-bent tubes.
Lower life-cycle cost with duplex stainless steels
Our portfolio of duplex stainless steels is the widest on the market. Duplex stainless steel heat exchanger tubes perform exceptionally well in a variety of environments and media common in process industries, resulting in lower life-cycle costs.
An alternative to expensive nickel alloys
One of the latest developments in the Sandvik duplex family, Sandvik SAF 2707 HD™ hyper-duplex stainless steel, can serve as a very competitive alternative to expensive nickel alloys and high-alloy austenitic stainless steels in the most demanding applications.
Materials
Heat exchanger tube materials
The tables show our standard materials for heat exchanger tube. Other grades can be offered on request.
Duplex stainless steels
| Sandvik grade | UNS | ASTM | EN no. | W.-nr | AFNOR |
|---|---|---|---|---|---|
| Sandvik 3RE60 | S31500 | - | 1.4424 | 1.4417 | Z2CND18-05-03 |
| Sandvik SAF 2205™ | S31803/S32205 | - | 1.4462 | - | Z2CND22-05-03 |
| Sandvik SAF 2304® | S32304 | - | 1.4362 | 1.4362 | Z2NC23-04AZ |
| Sandvik SAF 2707 HD™ | S32707 | - | - | - | - |
| Sandvik SAF 2507® | S32750 | - | 1.4410 | - | - |
High-alloy austenitic stainless steels and nickel alloys
| Sandvik grade | UNS | ASTM | EN steel no. | W.-nr | AFNOR |
|---|---|---|---|---|---|
| Sanicro® 70 | N06600 | Alloy 600 | - | 2.4816 | - |
| Sanicro® 69 | N06690 | Alloy 690 | 2.4642*** | 2.4642 | NC30FE(RCCM) |
| Sanicro® 60 | N06625 | Alloy 625 | - | - | - |
| Sanicro® 41 | N08825 | Alloy 825 | - | 2.4858 | - |
| Sanicro® 30 | N08800 | - | 1.4558 | 1.4558 | - |
| Sanicro® 28 | N08028 | - | 1.4563 | 1.4563 | - |
| Sandvik 2RK65™ | N08904 | - | 1.4539 | 1.4539 | Z1NCDU25-20-4 |
| 254 SMO* | S31254 | - | 1.4547 | (1.4529)** | - |
* 254 SMO is a trademark of Outokumpu OY.
** In brackets, nearest equivalent steel grade
*** Not applicable for tube and pipe. Only for information.
Austenitic stainless steels
| Sandvik grade | UNS | ASTM | EN steel no. | W.-nr | AFNOR |
|---|---|---|---|---|---|
| Sandvik 3R12 | S30403/S30400 | 304L/304 | 1.4306/1.4301 | 1.4306/1.4301 | Z2CN18-10 |
| Sandvik 3R60™ | S31603/S31600 | 316L/316 | 1.4435/1.4436 | 1.4435/1.4436 | Z2CND17-13 |
| Sandvik 5R75 | S31635 | 316Ti | 1.4571 | 1.4571 | (Z6CNDT17-12)** |
| Sandvik 6R35 | S32100/S32109 | 321/321H | 1.4541/1.4940 | 1.4541/1.4878 | (Z6CNT18-10)** |
Titanium and Zirconium
| Type of material | Grade(s) |
|---|---|
| Titanium | Pure titanium and titanium grades: 1, 2, 3, 4, 7, 9, 11, 12, 16, 17, 26 and 28 |
| Zirconium | Zirconium 702 (ZR-702) |
Product standards
| American standards | European standards | |||
|---|---|---|---|---|
| Sandvik grade | ASTM | ASME | EN | VD TÜV |
| Duplex | ||||
| Sandvik SAF 2707 HD™ | A-789 | SA-789 | - | - |
| Sandvik SAF 2507® | A-789 | SA-789 | 10216-5 | VD TÜV Blatt 508 |
| Sandvik SAF 2205™ | A-789 | SA-789 | 10216-5 | VD TÜV Blatt 418 |
| Sandvik SAF 2304® | A-789 | SA-789 | 10216-5 | - |
| Sandvik 3RE60 | A-789 | SA-789 | - | - |
| Ni-Alloy | ||||
| Sanicro® 70 | B-163 B-167 | SB-163 SB-167 | - | VD TÜV Blatt 305 |
| Sanicro® 69 | B-163 B-167 | SB-163 SB-167 | - | - |
| Sanicro® 41 | B-163 B-423 | SB-163 SB-423 | - | - |
| Sanicro® 30 | B-163 B-407 | SB-163 SB-407 | 10216-5 | - |
| Sanicro® 28 | B-668 | SB-668 | 10216-5 | VD TÜV Blatt 483 |
| Sandvik 2RK65™ | A-269 | SB-677 | 10216-5 | VD TÜV Blatt 421 |
| 254 SMO* | A-213 A-269 | SA-213 SA-269 | 10216-5 | - |
| Austenitic | ||||
| Sandvik 5R75 | A-213 | SA-213 | 10216-5 | - |
| Sandvik 3R60 | A-213 A-269 | SA-213 | 10216-5 | - |
| Sandvik 3R65 | A-213 A-269 | SA-213 | 10216-5 | - |
| Sandvik 6R35 | A-213 A-269 | SA-213 | 10216-5 | - |
| Sandvik 3R12 | A-213 A-269 | SA-213 | 10216-5 | - |
Mechanical properties
Mechanical properties for heat exchanger tube grades
| Sandvik grade | UNS |
Proof strength
|
Tensile strength
|
Elongation
|
|---|---|---|---|---|
| Rp0.2 | Rm | A | ||
| MPa/ksi | MPa/ksi | % | ||
| min. | min. | |||
| Duplex stainless steels | ||||
| Sandvik SAF 2707 HD™ | UNS S32707 |
700*/116*
|
920-1,000/133-160*
|
25
|
| Sandvik SAF 2507® | UNS S32750 |
550/93
|
800-1,000/116-145
|
25
|
| Sandvik SAF 2205™ | UNS S31803/S32205 |
485/73
|
680-880/99-128
|
25
|
| Sandvik SAF 2304® | UNS S32304 |
400/65
|
600-820/87-119
|
25
|
| Sandvik 3RE60 | UNS S31500 |
450
|
700-800/
|
- |
| Nickel alloys and high-alloy austenitic stainless steels | ||||
| Sanicro® 70 | UNS N06600 |
245
|
>560
|
35
|
| Sanicro® 69 | UNS N06690 |
240
|
585
|
30
|
| Sanicro® 41 | UNS N08825 |
240
|
590-750
|
30
|
| Sanicro® 30 | UNS N08800 | 205 | 520-690 | 30 |
| Sanicro® 28 | UNS N08028 |
220
|
550-750
|
40
|
| Sandvik 2RK65™ | UNS N08904 |
230
|
520-720
|
35
|
| 254 SMO* | UNS S31254 |
310
|
655-850
|
35
|
| Austenitic stainless steels | ||||
| Sandvik 5R75 | UNS S31635 |
220
|
510-710
|
35
|
| Sandvik 3R60™ | UNS S31603/S31600 |
220
|
515-690
|
45
|
| Sandvik 6R35 | UNS S32100/S32109 |
210
|
515-690
|
35
|
| Sandvik 3R12 | UNS S30403/S30400 |
210
|
515-680
|
45
|
U-bent tubes
U-bent heat exchanger tubes
Sandvik stainless heat exchanger tubes can also be delivered as U-bent tubes*, manufactured according to the common heat exchanger standards. Our basic specification is Sandvik spec. 7-2-1179, but we can also use DIN 28179, TEMA RCB 2.31 or various customer specifications. Copies of all specifications are available on request.
Technical parameters
- OD 12.7- 38 mm
- Bending radii from 1.5 x OD up to 1,250 mm. Minimum bending radii for OD over 28 mm after agreement.
- Leg length min. 1,000 mm.
- Leg length max. 12,000 mm.
- Heat treatment for radii up to 1,000 mm.
Heat treatment
If specified, we are equipped to carry out heat treatment of bends plus minimum 150 mm of leg.
- Furnace is computer controlled and all data is recorded.
- We use an Argon protective atmosphere inside the tubes.
- We can supply all types of annealing; solution annealing, stress relieving and stabilization.
Measuring, cutting, deburring and cleaning
- U-bends are measured exactly in accordance with relevant standards.
- All tubes are cut to the specified leg lengths, ends are deburred and the tubes are internally cleaned with air.
- Before packing, both ends of U-bends are capped with plastic caps.
Packing
- In strong, open or closed wooden boxes, depending on destination - max 8,000 kg.
- Ends of tubes protected by plastic caps.
- Vertical separators for each radius.
- Chloride free plastic separators between each row, every 2 meters.
- Each bundle is covered with plastic.
- Customers can provide a packing drawing or Sandvik can prepare a packing plan.
- Packing lists, covered with plastic, are placed on each wooden box for easy identification of order details, including exact list of radii and lengths inside.
* Valid for wall thickness less than or equal to 4 mm/0.157 in.
Applications
- Chemical processing
- Condensers
- Flue gas cleaning
- Evaporators
- Feedwater heaters
- Gas processing
- Hydrometallurgy
- Oil refining, petrochemical and gas processing
- Phosphoric acid production
- Petrochemical processing
- Salt evaporation
- Seawater-cooled heat exchangers
- Urea production
