ASTM/ASME A688 Stainless Steel Tube Specification for:
Seamless and Welded Austenitic Stainless Steel Feed water Heater Tubes.
It covers seamless and welded austenitic stainless steel feedwater heater tubes including those bent, if specified, into the form of U-tubes for application in tubular feed-water heaters.
The tubing sizes covered shall be 5⁄8 to 1 in. [15.9 to 25.4 mm] inclusive outside diameter, and average or minimum wall thicknesses of 0.028 in. [0.7 mm] and heavier.
Materials and Manufacture : seamless or welded and cold worked process.
ASTM A688 Stainless Steel Welded Tube Chemical Composition:
|
Chemical Composition |
||||||||||
|
Grade |
UNS |
C, max |
Mn, max |
P, max |
S, max |
Si, max |
Ni |
Cr |
Mo |
N |
|
Designation |
||||||||||
|
TP 304 |
S30400 |
0.08 |
2 |
0.04 |
0.03 |
0.75 |
8.0–11 |
18–20 |
… |
... |
|
TP 304L |
S30403 |
0.035 |
2 |
0.04 |
0.03 |
0.75 |
8.0–13 |
18–20 |
... |
... |
|
TP 304LN |
S30453 |
0.035 |
2 |
0.04 |
0.03 |
0.75 |
8.0–13 |
18–20 |
... |
0.10–0.16 |
|
TP 316 |
S31600 |
0.08 |
2 |
0.04 |
0.03 |
0.75 |
10–14 |
16–18 |
2–3 |
... |
|
TP 316L |
S31603 |
0.035 |
2 |
0.04 |
0.03 |
0.75 |
10–15 |
16–18 |
2–3 |
... |
|
TP 316LN |
S31653 |
0.035 |
2 |
0.04 |
0.03 |
0.75 |
10–15 |
16–18 |
2–3 |
0.10–0.16 |
|
TP 304N |
S30451 |
0.08 |
2 |
0.04 |
0.03 |
0.75 |
8.0–11 |
18–20 |
... |
0.10–0.16 |
|
TP 316N |
S31651 |
0.08 |
2 |
0.04 |
0.03 |
0.75 |
10–14 |
16–18 |
2–3 |
0.10–0.16 |
ASTM A688 Stainless Steel Welded Tube Description:
|
Out Diameter(OD): |
5/8"-1", 15.9mm-25.4mm. |
|
Wall Thickness(W.T.): |
0.035”, 0.065”, 0.083”, 0.89mm, 1.2mm, 1.65mm, 2.11mm, 2.6mm, BWG, SWG. |
|
Length(L): |
Fixed 6 meters, or other Length as Specified. |
|
End: |
Plain End. |
|
Delivery Condition: |
Annealed and Pickled, Bright Annealed, Polished(400#,600#). |
|
Inspection: |
100% PMI, Hydrostatic Test, Eddy Current, Ultrasonic, X-Ray, Penetrant Test. |
|
Mechanical Test: |
Tension Test, Flattening Test, Flaring Test, Hardness Test, Impact Test. |
|
Tolerance: |
According to the Production Standard. |
|
Packing: |
By Bundles, Plywood Cases. |
|
Marking: |
YASE PIPELINE, Material Grade, Standard, Specification, Heat No., Lot No. |
|
Mill Test Certificate: |
According to EN 10204 3.2 |
|
Production Time: |
2-30 Days, or up to the quantity. |
|
Shipping: |
By Sea, By Air, By Express. |
|
MOQ: |
500KGS. |
|
Sample: |
Free samples but freight charge paid by customer. |
|
Customized: |
Available. |
YASE PIPELINE Manufacturing ASTM A688 Welded Tube Products:
U-Bend Stainless Steel Welded Tube
Feed water Stainless Steel Welded Tube
Heater Stainless Steel Welded Tube
Stainless Steel Welded Condenser Tube
ASTM A688 Stainless Steel Welded Tube Mechanical Property:
|
Grade |
UNS
Designation
|
Tensile strength, min
ksi [MPa]
|
Yield strength, min ksi
[MPa]
|
Elongation in 2 in. or 50 mm, min, % |
|
304, 316 |
S30400, S31600 |
75 [515] |
30 [205] |
35 |
|
304L, 316L |
S30403, S31603 |
70 [485] |
25 [175] |
35 |
|
XM-29 |
S24000 |
100 [690] |
55 [380] |
35 |
|
304N, 316N |
S30451, S31651 |
80 [550] |
35 [240] |
35 |
|
304LN, 316LN |
S30453, S31653 |
75 [515] |
30 [205] |
35 |
|
800 |
N08800 |
75 [520] |
30 [205] |
30 |
|
800H |
N08810 |
65 [450] |
25 [170] |
30 |
ASTM A688 Stainless Steel Welded Tube Dimension Chart :
|
Outside Diamete |
Birmingham Wire Gauge (BWG) |
|||||||
|
20 |
18 |
16 |
15 |
14 |
13 |
|||
|
Inch |
Mm |
|
|
|
|
|
|
|
|
(0.889 Mm) |
(1.245 Mm) |
(1.651 Mm) |
(1.829 Mm) |
(2.108 Mm) |
(2.413 Mm) |
|||
|
Weight, Kg/M (Average Wall ) |
||||||||
|
1/4 |
0.25 |
6.35 |
0.12 |
0.16 |
0.19 |
– |
– |
– |
|
1/3 |
0.313 |
7.95 |
0.15 |
0.21 |
0.25 |
0.28 |
– |
– |
|
3/8 |
0.375 |
9.525 |
0.19 |
0.25 |
0.31 |
0.34 |
0.39 |
– |
|
1/2 |
0.5 |
12.7 |
0.25 |
0.34 |
0.45 |
0.49 |
0.55 |
0.61 |
|
5/8 |
0.625 |
15.875 |
0.33 |
0.45 |
0.58 |
0.64 |
0.71 |
0.8 |
|
3/4 |
0.75 |
19.05 |
0.4 |
0.55 |
0.72 |
0.77 |
0.88 |
0.98 |
|
7/8 |
0.875 |
22.225 |
0.46 |
0.64 |
0.83 |
0.92 |
1.04 |
1.18 |
|
1 |
1 |
25.4 |
0.54 |
0.74 |
0.97 |
1.06 |
1.21 |
1.37 |
|
2 7/8 |
2.875 |
73.025 |
– |
2.2 |
2.9 |
3.2 |
3.68 |
4.2 |
|
3 |
3 |
76.2 |
– |
2.31 |
3.04 |
3.35 |
3.85 |
4.39 |
|
3 1/2 |
3.5 |
88.9 |
– |
2.69 |
3.56 |
3.93 |
4.51 |
5.15 |
|
4 |
4 |
101.6 |
– |
– |
4.11 |
4.54 |
5.21 |
5.95 |
ASTM A688 Stainless Steel Welded Tube Dimensions Tolerance Chart:
|
Acceptable Description |
Tolerances |
|
Deviation From Plane Of Bend |
≤ 1.5 Mm |
|
Leg Lengths Different |
≤ 3.2 Mm |
|
Leg Lengths Tolerance L |
|
|
L ≤ 6 M |
+3.2 Mm – 0 |
|
6 > L ≤ 9 M |
+4 Mm – 0 |
|
L > 9 M |
+4.8 Mm – 0 |
|
Radius R |
± 1.5 Mm |
|
Leg Spacing (Measured At Tangency Point) |
± 1.5 Mm |
|
Ovality In The Bent Portion (Also Called Flattening) |
± 10 % |
|
This Can Be Described As Follow. |
|
|
(Dmax – D) / D < 10% |
|
|
(D – Dmin) / D < 10% |
|
|
“Neither The Major Nor Minor Diameter Of The Tube Shall Deviate From The Nominal Diameter Prior To Bending By More Than 10%” |
|
|
Wall Thickness In Bent Portion |
Shall Not Be Less Than The Value Determined By The below Equation: |
|
Tf = (4R X T) / (4R + D) |
|
|
Where : |
|
|
Tf = Wall Thickness After Bending |
|
|
T = Minimum Wall Thickness Before Bending |
|
|
R = Center line Bend Radius |
|
|
D = Nominal Outside Tube Diameter |
|
|
Squareness Of Ends |
|
|
D ≤ 15.9 Mm |
0.25 Mm |
|
15.9 > D ≤ 25.4 |
0.4 Mm |
|
D ≥ 25.4 ≤ 38.1 |
0.4 Mm |
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