The IS 1161 is a standard which covers the requirements for plain carbon steel tubes for structural purposes. All the IS 1161 YST 210 / 310 / 355 Pipes produced under this standard could be produced either in a hot finished welded or as known as HFW as well as hot finished seamless. In addition, the aforementioned techniques, these pipes could be constructed by either electric resistance welded i.e. ERW or high frequency induction welded i.e. HRIW processes. Per this standard, the designation of the IS 1161 carbon steel tubes for structural purposes must constitute details such as the nominal bore of the tube, the grade of the material as well as the classification on wall thickness.
The finishing of IS 1161 YST 22 tubes is to be clean while leaving its surface reasonably liberated from scale, along with being free from other surface flaws or defects, laminations and cracks. The ends have to have a clean cut, in the shape of a square with the axis of the IS 1161 Grade YST 310 tube, unless contrarily stipulated by the buyer. The presence of surface imperfections for e.g. light die or roll marks, handling marks, or for that matter, even shallow pits will not be acknowledged as defects. Though this holds true, provided that the flaws seen on the IS 1161 YST 355 are removable within the allowed minimum wall thickness. Generally, the elimination of these kinds of surface imperfections is not expected. Welded IS 1161 YST 210 tube needs to be free from any protruding metal on the external area of the weld seam.
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Product |
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IS 1161:2014 |
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Title |
: |
Steel Tubes for Structural Purposes |
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No. of amendments |
: |
NIL |
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Sampling Guidelines |
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Raw material |
: |
Steel tubes shall be manufactured from Hot rolled steel strip as per IS 10748 |
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Grouping Guidelines |
: |
Please refer Annex – A |
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Sample Size |
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For tubes-Mechanical: 3m, Chemical: 5 pcs of 5cm x 5cm For HR strip- Mechanical: 0.5 sq m, Chemical: 5 pcs of 5cm x 5cm |
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List of Test Equipment |
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Please refer Annex - B |
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Scheme of Inspection and Testing |
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Please refer Annex – C |
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Possible tests in a day |
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All tests |
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Scope of the Licence : |
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Licence is granted to use Standard Mark as per IS 1161:2014 with the following scope: |
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Name of the product |
Steel Tubes for Structural Purposes |
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Grade |
Grade: YSt 210, Yst 310 |
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Size |
Nominal Bore: 15mm up to and including 150 mm |
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Any other aspect required as per the Standard |
Manufacturing Process: ERW/HFIW/Seamless etc. End Condition: Plain/Bevel Ended Surface Condition: Black/ Galvanized |
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| SPEC | OUT SIDE DIAMETER | WALL
THICKNESS |
WEIGHT | LENGTH | |||
| PIPE BODY | PIPE END | ||||||
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IS:1161 |
Upto 48.3mm OD + 0.4mm, -0.8mm Over 48.3mm ± 1.0% |
N.A. | -10%, + not limited | Carload 10 MT Light ± 5%, M & H ± 7.5% Single Tube Light -8% + 10% Med & Heavy ± 10% |
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NORMAL |
Avg. (MIN) |
MINIMUM |
MAXIMUM |
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|
ft |
mtr |
ft |
mtr |
ft |
mtr |
ft |
mtr |
|
– |
6.0 |
– |
– |
– |
4.0 |
– |
7.0 |
|
Chemical Composition (%) Max. |
Mechanical Properties |
Impact |
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Energy |
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| Specification | Grade | C | Mn | P | S | Si | C.E. | Yield Strength | Tensile Strength | % Elongation | |||||||||||
|
J (Ft.lb) |
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| PCM | IIW | Min | Max | Min |
Max |
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| e (min) |
(min.) |
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| PSI | MPa | PSI | MPa | PSI |
MPa |
PSI |
MPa |
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| IS:1161 | YST-210 |
0.12 |
0.60 |
0.040 |
0.040 |
– |
– |
– |
– |
210 |
– |
– |
– |
330 |
– |
– |
Distance between plates | ||||
| YST-310 |
0.25 |
1.30 |
0.040 |
0.040 |
– |
– |
0.45 |
– |
310 |
– |
– |
– |
450 |
– |
– |
For parent- 60%, 75%, | |||||
| GL= 5.65 | Area | 75% N.A. | |||||||||||||||||||