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Petroleum
- May 4, 2022
- 2
This is my first post, so please comment if you see anything amiss on how or what I present in my question.
My question is regarding Weldolets® and Sockolets® and piping materials in a piping specification. Usually, the forged materials specified for flanges and olets are the same from 0.5" NPS to 24" NPS, for example ASTM A105. But I have a piping specification that doesn’t follow that convention. The general particulars for this pipe spec are design press of 1,480 PSIG @ 100°F, design temp of -10°F/+220°F with a service in fuel gas and gas lift operations. Designed to ASME B31.4/B31.8 (D.F. = 0.72) and a corrosion allowance of 1/16". The flange material is specified but the olet material is not, so I plan to follow the flange material unless there is a reason not to.
All of that is to get to this question regarding the material choices for the Weldolets® and Sockolets®.
For an 18" x 3" Weldolet®, would the material match the flange material associated with the pipe header? For example, the bill of material for that size would specify:
[highlight #FCE94F]WELDOLET, SCH 30 X SCH STD, ASTM A694 F52[/highlight]
But for an 8" x 3" Weldolet®, you would specify:
[highlight #FCE94F]WELDOLET, SCH STD, ASTM A105[/highlight]
Is this correct?
Thank you for your thoughtful consideration.
PositiveRate
My question is regarding Weldolets® and Sockolets® and piping materials in a piping specification. Usually, the forged materials specified for flanges and olets are the same from 0.5" NPS to 24" NPS, for example ASTM A105. But I have a piping specification that doesn’t follow that convention. The general particulars for this pipe spec are design press of 1,480 PSIG @ 100°F, design temp of -10°F/+220°F with a service in fuel gas and gas lift operations. Designed to ASME B31.4/B31.8 (D.F. = 0.72) and a corrosion allowance of 1/16". The flange material is specified but the olet material is not, so I plan to follow the flange material unless there is a reason not to.
Code:
Pipe Size Pipe Material Schedule Flg Material
---------- ------------------------ -------- ------------
0.5" - 2" API-5L Gr B, SMLS Sch XS ASTM A105
3" - 8" API-5L Gr B, ERW or SMLS Sch STD ASTM A105
10" API-5L X42, ERW or SMLS Sch STD ASTM A694 F42
12" - 14" API-5L X52, ERW or SMLS Sch STD ASTM A694 F52
16" API-5L X52, ERW or SMLS Sch XS ASTM A694 F52
18" API-5L X52, ERW or SMLS Sch 30 ASTM A694 F52
20" API-5L X52, ERW or SMLS Sch XS ASTM A694 F52
24" API-5L X52, ERW or SMLS Sch 30 ASTM A694 F52
For an 18" x 3" Weldolet®, would the material match the flange material associated with the pipe header? For example, the bill of material for that size would specify:
[highlight #FCE94F]WELDOLET, SCH 30 X SCH STD, ASTM A694 F52[/highlight]
But for an 8" x 3" Weldolet®, you would specify:
[highlight #FCE94F]WELDOLET, SCH STD, ASTM A105[/highlight]
Is this correct?
Thank you for your thoughtful consideration.
PositiveRate