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PSL1
4
Pipeliner
www.lincolnelectric.com
Joint Design
A customary joint preparation is commonly called an "API"
fitup. While this is not actually an API 1104 requirement,
the figures shown in the specification are drawn to have a
60 degree included angle with a 1/16" (1.6 mm) land and
1/16" (1.6 mm) gap.
As an alternative, for thicker wall pipe (>3/4", >20 mm), a
compound bevel can be used. The amount of material
required to fill a compound bevel joint is less than a 60
degree included angle preparation, so productivity may be
increased.
Pipe Grades
The primary pipe grades are classified in accordance with
the API 5L:2000 specification. This specification establishes
requirements for two product specification levels – PSL 1
and PSL 2. PSL 1 includes mandatory requirements for
chemistry, ductility, minimum yield strength and minimum
tensile strength. PSL 2 adds mandatory requirements for
maximum yield strength, maximum tensile strength and
Charpy impacts.
Recommended joint preparation
60˚
3/64-1/16 in.
(1.0-1.6 mm)
1/16-5/64 in.
(1.6-2.0 mm)
1/16 in.
(1.6 mm)
1/3 T
2/3 T
1/16-5/64 in.
(1.6-2.0 mm)
10˚
30˚
T
Wall thickness <3/4 in. (<20mm) Wall thickness >3/4 in. (>20mm)
Ultimate
Yield Strength Tensile Strength
Minimum Minimum
Grade psi MPa psi MPa
A25 25,000 (172) 45,000 (310)
A 30,000 (207) 48,000 (331)
B 35,000 (241) 60,000 (414)
X42 42,000 (290) 60,000 (414)
X46 46,000 (317) 63,000 (434)
X52 52,000 (359) 66,000 (455)
X56 56,000 (386) 71,000 (490)
X60 60,000 (414) 75,000 (517)
X65 65,000 (448) 77,000 (531)
X70 70,000 (483) 82,000 (565)
PSL2
Ultimate Ultimate
Yield Strength Yield Strength Tensile Strength Tensile Strength
Minimum Maximum Minimum Maximum
Grade psi MPa psi MPa psi MPa psi MPa
B 35,000 (241) 65,000 (448) 60,000 (414) 110,000 (758)
X42 42,000 (290) 72,000 (496) 60,000 (414) 110,000 (758)
X46 46,000 (317) 76,000 (524) 63,000 (434) 110,000 (758)
X52 52,000 (359) 77,000 (531) 66,000 (455) 110,000 (758)
X56 56,000 (386) 79,000 (544) 71,000 (490) 110,000 (758)
X60 60,000 (414) 82,000 (565) 75,000 (517) 110,000 (758)
X65 65,000 (448) 87,000 (600) 77,000 (531) 110,000 (758)
X70 70,000 (483) 90,000 (621) 82,000 (565) 110,000 (758)
X80 80,000 (552) 100,000 (690) 90,000 (621) 120,000 (827)