Kanggo njlentrehake ukuran tabung baja kanthi bener kudu kalebu sawetara parameter kunci:
Diameter njaba (OD)
Diameter njaba pipa baja, biasane ditulis minangka diameter nominal (DN) utawa ukuran pipa nominal (NPS).
Ukuran Pipa Nominal (NPS) vs. Diameter Nominal (DN)
NPS kuwi ukuran nominal adhedhasar inci, dene DN kuwi diameter nominal ing milimeter. Hubungan konversine relatif prasaja: nilai DN padha karo nilai NPS dikalikan 25,4 (mm/inch) kanggo mbunderake asil kasebut.
Ing praktik, korespondensi antarane standar NPS lan DN luwih adhedhasar tabel dimensi standar sing wis ditetepake.
Kekandelan Dinding (WT)
Kekandelan tembok pipa. Kanggo pipa ukuran standar, kekandelan tembok asring digandhengake karo Jadwal pipa, contone Jadwal 40 utawa Jadwal 80, ing ngendi nilai sing luwih gedhe nuduhake tembok sing luwih kandel.
Dawane
Dawane pipa baja, sing bisa dipasang utawa acak, gumantung saka kabutuhan produksi lan aplikasi. Dawane umume yaiku 6 meter lan 12 meter.
Bahan
Standar lan kelas bahan kanggo pipa baja, kayata ASTM A106 Kelas B, API 5L Kelas B, lan liya-liyane. Standar kasebut nemtokake komposisi kimia lan sifat fisik pipa.
Standar
Standar dimensi kanggo pipa karbon lan baja tahan karat utamane ngetutake ASME B36.10M (baja karbon lan paduan) lan B36.19M (pipa baja tahan karat).
Tabel Ukuran Pipa lan Tabel Kelas Bobot (WGT)
nyedhiyakake cara standar kanggo njlèntrèhaké kekandelan tembok pipa miturut Jadwal sing béda-béda, uga klasifikasi tingkat bobot kayata STD, XS, XXS, lan liya-liyané.
Kekandelan tembok pipa nduweni pengaruh langsung marang dimensi internal lan bobot pipa kasebut. Kekandelan tembok iku penting amarga nemtokake jumlah tekanan internal sing bisa ditahan pipa kasebut.
Nomer jadwal
Cara kanggo nuduhake kekandelan tembok pipa, umume kaya Jadwal 40 lan 80, nuduhake kekandelan tembok standar lan sing dikuatake saka pipa kanggo diameter njaba sing diwenehake.
Kira-kira pitungan nomer jadwal kaya ing ngisor iki:
Amarga kemampuane kanggo nahan tekanan khas, pipa baja Jadwal 40 lan Jadwal 80 umume dibutuhake ing macem-macem industri. Amarga pipa iki dirancang kanggo nahan tekanan sing luwih dhuwur, mula asring dibutuhake kanthi jumlah akeh kanggo nyukupi kabutuhan macem-macem industri.
| NPS | DIAMETER LUAR (IN) | DIAMETER NJERO (IN) | KETEBALAN DINDING (IN) | BOBOT (LB/FT) |
| 1/8 | 0.405" | 0.269" | 0.068" | 0,24 lb/ft |
| 1/4 | 0.540" | 0.364" | 0.088" | 0,42 lb/ft |
| 3/8 | 0.675" | 0.493" | 0.091" | 0,57 lb/ft |
| 1/2 | 0.840" | 0.622" | 0.109" | 0,85 lb/ft |
| 3/4 | 1.050" | 0.824" | 0.113" | 1,13 lb/ft |
| 1 | 1.315" | 1.049" | 0.133" | 1,68 lb/ft |
| 1 1/4 | 1.660" | 1.380" | 0.140" | 2,27 lb/ft |
| 1 1/2 | 1.900" | 1.610" | 0.145" | 2,72 lb/ft |
| 2 | 2.375" | 2.067" | 0.154" | 3,65 lb/ft |
| 2 1/2 | 2.875" | 2.469" | 0.203" | 5,79 lb/ft |
| 3 | 3.500" | 3.068" | 0.216" | 7,58 lb/ft |
| 3 1/2 | 4.000" | 3.548" | 0.226" | 9,11 lb/ft |
| 4 | 4.500" | 4.026" | 0.237" | 10,79 lb/ft |
| 5 | 5.563" | 5.047" | 0.258" | 14,62 lb/ft |
| 6 | 6.625" | 6.065" | 0.280" | 18,97 lb/ft |
| 8 | 8.625" | 7.981" | 0.322" | 28,55 lb/ft |
| 10 | 10.750" | 10.020" | 0.365" | 40,48 lb/ft |
| 12 | 12.75" | 11.938" | 0.406" | 53,52 lb/ft |
| 14 | 14.000" | 13.124" | 0.438" | 63,50 lb/ft |
| 16 | 16.000" | 15.000" | 0.500" | 82,77 lb/ft |
| 18 | 18.000" | 16.876" | 0.562" | 104,70 lb/ft |
| 20 | 20.000" | 18.812" | 0.594" | 123,10 lb/ft |
| 24 | 24.000" | 22.624" | 0.688" | 171,30 lb/ft |
| NPS | DIAMETER LUAR (IN) | DIAMETER NJERO (IN) | KETEBALAN DINDING (IN) | BOBOT (LB/FT) |
| 1/8 | 0.405" | 0.215" | 0.095" | 0,32 lb/ft |
| 1/4 | 0.540" | 0.302" | 0.119" | 0,54 lb/ft |
| 3/8 | 0.675" | 0.423" | 0.126" | 0,74 lb/ft |
| 1/2 | 0.840" | 0.546" | 0.147" | 1,09 lb/ft |
| 3/4 | 1.050" | 0.742" | 0.154" | 1,47 lb/ft |
| 1 | 1.315" | 0.957" | 0.179" | 2,17 lb/ft |
| 1 1/4 | 1.660" | 1.278" | 0.191" | 3.00 lb/ft |
| 1 1/2 | 1.900" | 1.500" | 0.200" | 3,63 lb/ft |
| 2 | 2.375" | 1.939" | 0.218" | 5,02 lb/ft |
| 2 1/2 | 2.875" | 2.323" | 0.276" | 7,66 lb/ft |
| 3 | 3.500" | 2.900" | 0.300" | 10,25 lb/ft |
| 3 1/2 | 4.000" | 3.364" | 0.318" | 12,50 lb/ft |
| 4 | 4.500" | 3.826" | 0.337" | 14,98 lb/ft |
| 5 | 5.563" | 4.813" | 0.375" | 20,78 lb/ft |
| 6 | 6.625" | 5.761" | 0.432" | 28,57 lb/ft |
| 8 | 8.625" | 7.625" | 0.500" | 43,39 lb/ft |
| 10 | 10.750" | 9.562" | 0.594" | 64,42 lb/ft |
| 12 | 12.75" | 11.374" | 0.688" | 88,63 lb/ft |
| 14 | 14.000" | 12.500" | 0.750" | 106,10 lb/ft |
| 16 | 16.000" | 14.312" | 0.844" | 136,58 lb/ft |
| 18 | 18.000" | 16.124" | 0.938" | 170,87 lb/ft |
| 20 | 20.000" | 17.938" | 1.031" | 208,92 lb/ft |
| 24 | 24.000" | 21.562" | 1.219" | 296,58 lb/ft |
Mulane, conto lengkap katrangan ukuran pipa baja bisa uga "NPS 6 inci, Jadwal 40, ASTM A106 Kelas B, Dawane 6 meter". Iki nggambarake pipa baja kanthi diameter nominal 6 inci, Jadwal 40, diprodhuksi miturut standar ASTM A106 Grade B, lan dawane 6 meter.
Wektu kiriman: 28 Februari 2024