MAIN FEATURES OF PIPES AGAINST VARIOUS SPECIFICATION
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Sr. No. |
Specification |
Scope/Purpose |
Dimension Tolerances |
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|
Diameter |
Ovality |
Thickness |
Straightness |
Reinforcement |
Joints & Ends |
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1 |
IS 3589:2001 |
Seamless and welded carbon steel pipes for water and
sewage. This covers outside diameter from 168.3 to 2540 mm. |
± 0.75% |
D/t ≤100
= 1% D/t > 100 = agreed between the manufacturer and
the purchaser |
+ 20% - 12.5 % |
Shall not exceed 0.2 % of Total Length |
Inside weld < 60 % of nominal Thickness |
Bevel= 30O
+5, - 0 Root face = 1.6±0.8 |
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2 |
API : 2000 |
Seamless and welded steel line pipe suitable for use
in conveying gas, water and oil in both the oil and natural gas industries |
Pipe body |
|
Applies only to pipe with D/t ≤
75 |
Gr. B or lower |
Gr. X42 or Higher |
Shall not
exceed 0.2 % of Total Length |
Wall thickness 12.70 mm and under |
Wall thickness over 12.70 mm |
Bevel= 30O
+5, - 0 Root face= 1.56 ± 0.79 mm |
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2 3/8and <20 |
± 0.75% |
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≥20 and ≤36 |
+.0.75%, -0.25% |
2 7/8and <20 inch |
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> 36
|
+6.35 , -3.20mm |
+15 % , - 12.5 % |
+15 % , -
12.5 % |
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Pipe Ends |
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>103/4 and ≤20 |
+ 2.38 mm - 0.79 mm |
Pipe Size |
|
≥20 inch |
3.18 mm max |
4.76 mm max |
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>20 and ≤42 |
>20 and ≤42 |
± 1% |
12.7mm |
+17.5 % - 12.5 % |
+17.5 % - 10 % |
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|
>42 |
>42 |
± 1% |
15.9mm |
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3 |
SA 671 |
EFW pipe with filler metal added, Fabricated from
pressure vessel quality plate. This cover 405 mm in OD or larger and of 6.4
mm thickness or greater. |
Based on circumferential measurement ± 0.5 % of
specified outside diameter |
1 % |
- 0.25 mm |
Max. 3.2 mm per 10 foot |
3.2 mm max |
Bevel= 37O +2.5,-
0. Root face= 1.56 ± 0.79 mm |
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|
4 |
SA 672 |
EFW pipe with filler metal added, Fabricated from
pressure vessel quality plate. This cover 405 mm in OD or larger with thick
up to 75 mm inclusive. |
Based on circumferential measurement ± 0.5 % of
specified outside diameter |
1 % |
- 0.3 mm |
Max. 3.2 mm
per 10 foot |
3.2 mm max |
Bevel= 37O +2.5,-
0. Root face= 1.56 ± 0.79 mm |
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5 |
SA 691 |
Carbon and alloy steel pipe, EFW with filler metal
added, fabricated from pressure vessel quality plate. (405 mm in OD or larger
with wall thickness up to 75 mm inclusive.) |
Based on circumferential measurement ± 0.5 % of
specified outside diameter |
1 % |
- 0.3 mm |
Max. 3.2 mm per 10 foot |
3.2 mm max |
Bevel= 37O +2.5,-
0. Root face= 1.56 ± 0.79 mm |
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|
6 |
SA 134 |
EFW (arc) straight or spiral seam pipe NPS 16 and
over diameter with wall thick up to 19 mm inclusive. The steel from which the
pipe is made shall conform to spec.. A283 , A 285 , A570 or A36 or to other ASTM spec.. for equally suitable weldable
material, as specified. |
Circumference based on OD |
1 % (Where the D/t is over 120, internal bracing should
be utilized to achieve sizing of ends. |
The wall thickness for welded pipe shall be governed
by the requirements of the specification to which the steel was ordered |
Commercially straight |
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---- |
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BODY : ± 0.5%
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END : pipe
ends for distance of not less than 100 mm ± 60% of nominal wall THK of the
pipe from the nominal outside circum based on diameter, expect that the
tolerance shall not be less than 5 mm. |
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7 |
SA 139 |
Covers five grades of EFW straight or spiral seam
steel pipe in PNS 4 to 92 inclusive with nominal wall thickness up to 25.4 mm
inclusive. The pipe is intended for conveying liquid ,
gas or vapour. |
Circumference based on OD |
The pipe shall be substantially round. |
-12.5 % |
Commercially straight |
---- |
---- |
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± 1%. But not exceeding 19 mm from the nominal
outside circum based upon the diameter specified. |
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END :circum of pipe ends for a distance of not less
than 100 mm ± 60% of nominal wall thk of the pipe
from the nominal OD circum based on diameter, Except that the tolerance shall
not be less than 9.5 mm |
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|
Sr. No. |
Specification |
Scope/Purpose |
Dimension Tolerances |
|||||
|
Diameter |
Ovality |
Thickness |
Straightness |
Reinforcement |
Joints & Ends |
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|
8 |
A 252 |
Covers nominal wall steel pipe piles of cylindrical
shape. (the steel cylinder acts as a permanents load
carrying member, or as a shell to form cast in place concrete piles. The pipe
piles may be made any of the following seamless, electric welded, flash
welded, fusion welded. |
± 0.75% |
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-12.5% |
----- |
----- |
Bevel= 30O
+5, - 0 Root face = 1.6±0.8 |
|
9 |
A381 |
Covers straight seam, double SAW pipe suitable for
high pressure service, 406 mm and larger in outside diameter. With wall
thickness from 7.9 to 38mm. The pipe is intended for fabrication of fitting
and accessories for compressor or pump station piping .
The weld shall be preferably by the automatic SAW press .All pipe after
welding shall be
heat treated at a temperature of 593O C or higher. |
± 0.50% of the specified OD for the OD based on
circum measurement, Expect that in sizes 610 mm and smaller this tolerance
shall be + 3.2 mm. |
1 % |
Shall not be more than 0.25 mm under the specified thk localized (isolated and non-continuous) reductions in
wall thk caused by non injurious surface defects
may be permitted up to a depth not exceeding 6 ½ % the specified pipe wall
thickness |
----- |
----- |
Root face = 1.6±0.8 Square ness 1.6 mm |
|
10 |
SA 714 |
Covers seamless and welded high-strength low alloy
steel pipe .NPS ½ to NPS 26 Inclusive. Class - These high strength low alloy
steel have enhanced resistance to general atmospheric corrosion by weathering
as commonly encountered in rural , urban, marine and
industrial environments. Class 2 having corrosion resistance equivalent to
that of carbon steel with copper (0.20 min Cu) and class- 4 having corrosion
resistance substantially better than that of class2 class4 steels when properly
exposed to the atmosphere can be used bare of many applications. |
± 1% |
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- 12.5% |
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----- |
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11 |
API 2B |
Covers the fabrication of structural steel pipe from
steel with longitudinal and circumferential butt welded seams, typically in
sizes 14” outside diameter(OD) and larger with wall thickness 3/8 inch and
greater (upto a nominal 40 feet in length) suitable
for use in construction of welded offshore structures. |
The outside circumference at any point in a length
of pipe shall be within ±1% of the nominal circumference of within ±12.7 mm ,
whichever is less |
1 % or 6.35 mm maximum for wall thickness upto and including 50.8 mm. For wall thickness exceeding
50.8 mm the maximum permitted deviation shall not exceed as out-of roundness
to wall thickness ratio of 1:8. For pipe exceeding 48” in diameter, a maximum
deviation of 12.7 mm shall be permitted provided the circumference tolerance
is maintained within ±6.35 mm |
The diameter of pipe furnished to this specification
shall be as specified by the purchaser. |
3.2 mm per 10 foot For length over 10 foot , the
maximum deviation of the entire length may be computed by the following
formula, not to exceed 9.525 mm in any 40 Foot |
|
Bevel= 30O
±2.5, Root face = 1.6±0.8 |