Continuous Hairpin Metal U Shaped 1500mm Welded Fin Tubes
ASTM A106 SMLS carbon steel , continuous hairpin welding steel U tube bundle
Quick Detail:
ASTM A106B/ASME SA106B (Available steel grade: GradeA / B / C).
ASTM 179/ASME SA179
ASTM 192/ASME SA192
ASTM A213 T11 /T22
Tube Type:Seamless (cold drawn)
Tube Ends:Plain ends or bevel ends
Description:
Continuous hairpin welding steel U tube bundle. These tubes are widely used in boilers and economizers.
Grade and Chemical Composition:
|
Grade
| C≤ | Mn | P≤ | S≤ | Si≥ | Cr≤ | Cu≤ | Mo≤ | Ni≤ | V≤ |
| A | 0.25 | 0.27-0.93 | 0.035 | 0.035 | 0.10 | 0.40 | 0.40 | 0.15 | 0.40 | 0.08 |
| B | 0.30 | 0.29-1.06 | 0.035 | 0.035 | 0.10 | 0.40 | 0.40 | 0.15 | 0.40 | 0.08 |
| C | 0.35 | 0.29-1.06 | 0.035 | 0.035 | 0.10 | 0.40 | 0.40 | 0.15 | 0.40 | 0.08 |
Factory test and other terms:
1. Hydrostatic or Nondestructive Electric Test
2. Heat Treatment: according to Standard
3. Surface Condition:According to Standard.
4. Grain Size:According to standard
5. Sampling:flattening,flaring,grain size,Marking
6. We provide bevel end,plastic cap, varnish coating, oiled or black painted to prevent rustand other packing
service.
Technical Requirements:
Straight Tubes Standard Specification For Bending:
ASTM A106; ASTM A179 ;ASTM A192 ; ASTM A210 etc
Marking:
Before Bending By Marking Machine All Over The Tube Length
(Bent Section After Heat Treatment Without Marking)
U-Bend Tubes:
-TEMA RCB 2.31 Standard Of The Tubular Exchanger Manufacturers Association (9th Edition).
-ASTM A688/ASME SA688 Standard Specification For Welded Tubes Of Austenitic Corrosion Resistant
Steel Grade Designed For Feed Water Boilers.
-ASTM B163/ASME SA163 Standard Techinical Requirements For Tubes Of Nickel And Nickel Alloy For
Condensers And Heat Exchangers.
Bending Radius:
From 1.5*OD(Outside Diameter) To 1500mm
When Ordering Tubes With Radius less or equal to 1.5*OD, It Is Necessary To Agree Precision Of Geometrics.
Straight Tubes Maximum Length:
(Before Bending): 35000 mm.
Leg Length:
Min 1 Meter, Max. 16500 mm (For Max R=1500mm)
Heat Treatment:
Stress Relieved After U-Bending (Bending Area Plus 300MM For Each Leg).
Hydrostatic Test After U Bending:
Maximum Test Pressure 600 Bar, Soaking 10 Sec.
Medium:Dematerialized Water. Compressed Air Cleaning After Hydro-Test.
Packaging: In Strong Transport-Worthy Pre-fumigated wooden boxes of corresponding dimensions for
each tube Length, Radius, Diameter, According To PO requirements as well as wrapped In polyethylene
films With soft plastic caps on both end of Tube.
Grade and Chemical Composition (%):
| STANDARD | GRADE | CHEMICAL COMPOSITION |
| C | Si | Mn | P | S | Cr | Mo | Cu | Ni | V |
| ASTM A179 | A179 | ≤0.06-0.18 | / | 0.27-0.63 | ≤0.035 | ≤0.035 | | | | | |
| ASME SA106 | SA106B | 0.170.25 | ≥0.1 | 0.701.00 | ≤0.030 | ≤0.030 | ≤0.035 | | | | |
| ASTM A106 | A | ≤0.25 | ≤0.10 | 0.270.93 | ≤0.035 | ≤0.035 | ≤0.40 | ≤0.15 | ≤0.40 | ≤0.40 | ≤0.08 |
| B | ≤0.30 | ≤0.10 | 0.291.06 | ≤0.035 | ≤0.035 | ≤0.40 | ≤0.15 | ≤0.40 | ≤0.40 | ≤0.08 |
| C | ≤0.35 | ≤0.10 | 0.291.06 | ≤0.035 | ≤0.035 | ≤0.40 | ≤0.15 | ≤0.40 | ≤0.40 | ≤0.08 |
| ASTM A53 | A | 0.25 | / | 0.95 | 0.05 | 0.045 | 0.40 | 0.15 | 0.40 | 0.40 | 0.08 |
| B | 0.3 | / | 1.2 | 0.05 | 0.045 | 0.40 | 0.15 | 0.40 | 0.40 | 0.08 |
