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NPS 18
| Dimensions | ||
|---|---|---|
| WWeight | 202.9 | |
| tThickness | 1.125 | |
| ODOutside diameter | 18 | |
| IDInside diameter | 15.75 | |
| AArea | 59.64 | |
| Major axis | ||
| IxSecond moment of area | 2,132 | |
| SxElastic modulus | 236.9 | |
| ZxPlastic modulus | 320.8 | |
| rxRadius of gyration | 5.979 | |
| ytopCentroid to top | 9 | |
| ybotCentroid to bottom | 9 | |
| Minor axis | ||
| IySecond moment of area | 2,132 | |
| SyElastic modulus | 236.9 | |
| ZyPlastic modulus | 320.8 | |
| ryRadius of gyration | 5.979 | |
| Torsion and warping | ||
| JTorsion constant | 4,265 | |
API 5L Table 3A/3B
| Steel type | Carbon-manganese, Nb/V/Ti allowed | |
|---|---|---|
| FyYield strength, minimum | 52 | |
| FuTensile strength, minimum | 66 | |
| EModulus of elasticity | 29,000 | |
| GShear modulus | 11,200 | |
| νPoisson's ratio | 0.3 | |
| ρDensity | 490 | |
| Flexure class, AISC 360 Table B4.1 | Compact, D/t 16.0 (λp 39, λr 172.7) | |
| API RP 2A-WSD group and class | Group II Class C; Class B with SR5/SR6 | |
| Capacity (nominal, no resistance or safety factors) | ||
| PyAxial yield, A·Fy | 3,101 | |
| MyYield moment, Sx·Fy | 1,027 | |
| MpPlastic moment, Zx·Fy | 1,390 | |
| Test Pressure | Std. | Alt. | |
|---|---|---|---|
| Grade A | 2,250 | 2,800 | |
| Grade B | 2,630 | 2,800 | |
| Grade X42 | 3,000 | 3,630 | |
| Grade X46 | 3,000 | 3,630 | |
| Grade X52 (grade picked) | 3,000 | 3,630 | |
| Grade X56 | 3,000 | 3,630 | |
| Grade X60 | 3,000 | 3,630 | |
| Grade X65 | 3,000 | 3,630 | |
| Grade X70 | 3,000 | 3,630 | |
| Grade X80 | 3,000 | 3,630 |