| MATERIAL: | TP304/304L/304H ， TP310S/310H， TP316L/316H/316Ti ，TP317/317L ， TP321/321H， TP347/347H 904L ， SAF2205， SAF2507， S31803， S32750， S32760 | STANDARD: | ASME SA213 ， ASTM A269 ， ASME SA789 ，ASTM A 789 ，EN10216-5 ， DIN17458， GOST 9941-81 |
|---|---|---|---|
| OD: | 1/4′(6.35)， 3/8′(9.52)， 1/2′ (12.7)， 5/8′(15.88)， 3/4′ (19.05)， 1′(25.4) ， 1-1/4′(31.75)， 1-1/2′(38.1)， 2′ (50.8)， 2-1/2′(63.5) ， 3′ (76.2) | NDT: | ET， HT， UT |
| WT: | 0.89，1，1.2，1.5，1.65，2，2.11MM… | TYPE: | STRAIGHT，CORRUGATED |
| High Light: | heat exchanger pipe， seamless stainless steel tube | ||
Stainless Steel Corrugated Tubes For Heat Exchangers ASTM A213 Seamless Tube
Quick Detail:
| General Low Fin Tubes Production Capacity | Specifications of Low Fin Tubes('N' Fins) |
| Finning Facility: 10 finning machines; Daily capacity up to 3000 meters; | Tube OD: 12.7 mm~25.4mm Tube Length: 18 meters max. Fin Height: 1.2 mm ~2.77mm Fin Thickness: appr. 0.3mm Fin Pitch: 30 FPI /28 FPI/ 26 FPI/ 36 FPI /43 FPI |
Description:
Manufacturing process: The fins are rolled out of outer wall of the plain tubes by a pass roller. Tubes and fins are in same piece tube. We call it “N” fin type.
Tube Materials:
ASTM A213 / A213M :Seamless Ferritic & Austenitic Alloy-Steel Boiler， Superheater， and Heat-Exchanger Tubes
ASTM A312/ A312M : Seamless， Welded， and Heavily Cold Worked Austenitic Stainless Steel Pipes
ASTM A269/ A269M :Seamless and Welded Austenitic Stainless Steel Tubing for General Service
Delivery Range of Low Fin Tubes
We can provide the integral low fin tubes with un-finned section gaps( 5mm Min.) in the middle of core tube OR bent with designed Bend Radius.
Quality Test:
The integral low fin tube quality is assured by hydrostatic or pneumatic tests， eddy current tests & MARCO tests in order to verify design specifications.
Acceptance Ceritia:
WOLVERINE / HPT / GEWA-K & GEWA-KS
Delivery Condition:
Tube ends are square cut， free burrs， internally dried and air blown clean， externally coated with varnish.
The desiccants are put into the each package for continental transportation.
Applications:
The Integral Low Finned Tubes find the preference in the following industrial sectors:
- Heating systems
- Ventilation systems
- Refrigeration and climate control systems
- Mechanical engineering
- Automotive manufacturing
- Chemicals and pertrochemical and power plant technology
Specifications:
Tube and fins consist of same tube and materials as carbon steel ， low-alloy steels ， stainless steel ， brass ， copper ， cooper-nickel alloys ， aluminum bronze ， nickel alloys ， titanium etc…
| Plain tube (mm) | Finned section dimensions (mm) | Ratio | De | |||
| D×t | Tp | dd | dr | di | η | mm |
| 19×2 | 0.8 | 18.8 | 17 | 134 | 2.8 | 17.9 |
| 19×2 | 1 | 18.8 | 16.8 | 13.4 | 2.5 | 17.8 |
| 19×2 | 1.25 | 18.8 | 16.6 | 13 | 2.2 | 17.8 |
| 19×2 | 1.5 | 18.8 | 16.6 | 13 | 2 | 17.7 |
| 19×2 | 2 | 18.8 | 16.4 | 13 | 1.7 | 17.5 |
| 25×2.5 | 0.8 | 24.8 | 23 | 18.8 | 2.8 | 23.9 |
| 25×2.5 | 1 | 24.8 | 22.6 | 18.8 | 2.75 | 23.7 |
| 25×2.5 | 1.25 | 24.8 | 22.3 | 18 | 2.5 | 23.6 |
| 25×2.5 | 1.5 | 24.8 | 22.3 | 18 | 2.2 | 23.5 |
| 25×2.5 | 2 | 24.8 | 22 | 18 | 1.8 | 23.4 |
| 25×2.5 | 2.5 | 24.8 | 22 | 18 | 1.6 | 23.3 |
| D——Outside diameter of plain end section Dof—-Diameter of top fins Dr—–Root diameter of finned section Di—–Inside diameter of finned section T——Wall thickness of plain end section Tp—–Fin pitch De—-Equivalent diameter of finned tube L——Plain tube end length | ||||||
| Please email us for more information. | ||||||
ASTM A1012 : Standard Specification for Seamless and Welded Ferritic， Austenitic and Duplex Alloy Steel Condenser and Heat Exchanger Tubes With Integral Fins.
ASTM B891: Standard Specification for Seamless and Welded Titanium and Titanium Alloy Condenser and Heat Exchanger Tubes with Enhanced Surface for Improved Heat Transfer.
ASTM B924:Standard Specification for Seamless and Welded Nickel Alloy Condenser and Heat Exchanger Tubes With Integral Fins.
