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 feed water 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 Seamless 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 Seamless 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 Seamless Tube Products:
U-Bend Stainless Steel Seamless Tube
Feed water Stainless Steel Seamless Tube
Hearter Stainless Steel Seamless Tube
Stainless Steel Seamless Condenser Tube
ASTM A688 Stainless Steel Seamless Tube Mechanical Property:
|
Grade |
UNS |
Tensile strength, min |
Yield strength, min ksi |
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 Seamless 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 Seamless 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 Thebelow 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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