JIS G 3454nyaéta standar industri Jepang pikeun pipa baja karbon pikeun sistem tekanan kalayan suhu operasi maksimum 350 ° C.Standar ngawengku dua sasmita:STPG 370jeungSTPG 410.Ieu lumaku pikeun lalawanan listrik dilas (RW) atanapi pipa seamless kalayan diaméter nominal 10,5 mm nepi ka 660,4 mm (ie 6A mun 650A, atawa 1/8B mun 26B).
Pipa baja JIS G 3454 kedah diproduksi nganggo kombinasi metode manufaktur pipa baja sareng metode pagawean anu cocog dina tabel di handap ieu.
| Lambang kelas | Simbol tina prosés manufaktur | ||
| Prosés manufaktur pipa | Métode finishing | Klasifikasi séng-palapis | |
| STPG370 STPG410 | Leres: S Résistansi listrik dilas: E | Panas-réngsé: H Bérés tiis: C Salaku lalawanan listrik dilas: G | Pipa hideung: pipa henteu dibéré palapis séng Pipa bodas: pipa dibéré séng-palapis |
Sacara husus, aya lima métode manufaktur:
SH: Hot-réngsé pipa baja seamless;
SC: Pipa baja seamless tiis-réngsé;
EH: Hot-réngsé lalawanan listrik dilas pipe baja;
EC: Tiis-réngsé lalawanan listrik dilas pipe baja;
EG: Résistansi listrik dilas pipa baja lian ti panas-rengse tur tiis-réngsé leuwih.
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| Lambang kelas | C | Si | Mn | P | S |
| max | max | — | max | max | |
| STPG 370 | 0,25% | 0,35% | 0,30-0,90% | 0,040% | 0,040% |
| STPG 410 | 0,30% | 0,35% | 0,30-1,00% | 0,040% | 0,040% |
Ngamungkinkeun nambahkeun elemen alloying séjén.
Kakuatan Tensile, Titik Ngahasilkeun atanapi Stress Buktina, sareng Manjang
| Lambang tina kelas | Kakuatan regangan | titik ngahasilkeun atawa stress buktina | Elongation mnt,% | |||
| Sapotong tés tensile | ||||||
| No.11 atawa No.12 | No.5 | No.4 | ||||
| N/mm² (MPA) | N/mm² (MPA) | Arah uji tensile | ||||
| min | min | Sajajar jeung sumbu pipe | Jejeg sumbu pipa | Sajajar jeung sumbu pipe | Jejeg sumbu pipa | |
| STPT370 | 370 | 215 | 30 | 25 | 28 | 23 |
| STPT410 | 410 | 245 | 25 | 20 | 24 | 19 |
Tes Flattening
Nalika jarak antara dua pelat ngahontal jarak anu ditangtukeun H, moal aya cacad atanapi retakan dina permukaan pipa baja.
Pikeun tabung baja seamless: H = (1+e)t/(e + t/D);
Pikeun pipa baja ERW: H = 1/3 D (pikeun weld) atanapi H = 2/3 D (pikeun porsi tanpa weld);
H: jarak antara pelat flattening (mm);
е: konstan didefinisikeun individual pikeun tiap kelas pipa, 0,08 pikeun STPG 370, 0,07 pikeun STPG 410;
t: ketebalan témbok pipa (mm);
D: diaméterna luar pipa (mm);
Tes Flattening tiasa dianggo pikeun pipa baja kalayan diaméter nominal langkung ageung tibatan 40A (48.6mm).
Bendability
Bendability manglaku ka pipa kalayan diaméter nominal 40 A (48,6) atawa leuwih leutik.
Pipa kudu dibengkokkeun 90 ° dina radius 6 kali diaméter luar na.Tembok pipa kedah bébas tina cacad atanapi retakan.
Unggal pipa baja kedah ngalaman uji tekanan hidrostatik atanapi uji non-destructive.
Uji Hidrostatik
Pertahankeun tekanan anu tangtu pikeun sahenteuna 5 detik tanpa bocor.
Nilai tekanan patali jeung jadwal No.. tina pipa baja.
| Ketebalan témbok nominal | Nomer jadwal: Sch | |||||
| 10 | 20 | 30 | 40 | 60 | 80 | |
| Tekanan uji hidrolik minimum, Mpa | 2.0 | 3.5 | 5.0 | 6.0 | 9.0 | 12 |
Test Non-destructive
Upami pamariksaan ultrasonik dianggo, éta kedah dumasar kana standar anu langkung ketat tibatan sinyal kelas UD di JIS G 0582.
Upami tés arus eddy dianggo, éta kedah dumasar kana standar anu langkung ketat tibatan sinyal kelas EY dina JIS G 0583.
| diaméterna nominal | Diaméter luar | Kandel témbok | Unit massa | Nomer jadwal (Sch No.) | |
| A | B | mm | mm | kg/m | |
| 6 | 1/8 | 10.5 | 1.7 | 0.369 | 40 |
| 6 | 1/8 | 10.5 | 2.2 | 0.450 | 60 |
| 6 | 1/8 | 10.5 | 2.4 | 0.479 | 80 |
| 8 | 1/4 | 13.8 | 2.2 | 0,629 | 40 |
| 8 | 1/4 | 13.8 | 2.4 | 0,675 | 60 |
| 8 | 1/4 | 13.8 | 3.0 | 0.799 | 80 |
| 10 | 3/8 | 17.3 | 2.3 | 0.851 | 40 |
| 10 | 3/8 | 17.3 | 2.8 | 1.00 | 60 |
| 10 | 3/8 | 17.3 | 3.2 | 1.11 | 80 |
| 15 | 1/2 | 21.7 | 2.8 | 1.31 | 40 |
| 15 | 1/2 | 21.7 | 3.2 | 1.46 | 60 |
| 15 | 1/2 | 21.7 | 3.7 | 1.64 | 80 |
| 20 | 3/4 | 27.2 | 2.9 | 1.74 | 40 |
| 20 | 3/4 | 27.2 | 3.4 | 2.00 | 60 |
| 20 | 3/4 | 27.2 | 3.9 | 2.24 | 80 |
| 25 | 1 | 34.0 | 3.4 | 2.57 | 40 |
| 25 | 1 | 34.0 | 3.9 | 2.89 | 60 |
| 25 | 1 | 34.0 | 4.5 | 3.27 | 80 |
| 32 | 1 1/4 | 42.7 | 3.6 | 3.47 | 40 |
| 32 | 1 1/4 | 42.7 | 4.5 | 4.24 | 60 |
| 32 | 1 1/4 | 42.7 | 4.9 | 4.57 | 80 |
| 40 | 1 1/2 | 48.6 | 3.7 | 4.10 | 40 |
| 40 | 1 1/2 | 48.6 | 4.5 | 4.89 | 60 |
| 40 | 1 1/2 | 48.6 | 5.1 | 5.47 | 80 |
| 50 | 2 | 60.5 | 3.2 | 4.52 | 20 |
| 50 | 2 | 60.5 | 3.9 | 5.44 | 40 |
| 50 | 2 | 60.5 | 4.9 | 6.72 | 60 |
| 50 | 2 | 60.5 | 5.5 | 7.46 | 80 |
| 65 | 2 1/2 | 76.3 | 4.5 | 7.97 | 20 |
| 65 | 2 1/2 | 76.3 | 5.2 | 9.12 | 40 |
| 65 | 2 1/2 | 76.3 | 6.0 | 10.4 | 60 |
| 65 | 2 1/2 | 76.3 | 7.0 | 12.0 | 80 |
| 80 | 3 | 89.1 | 4.5 | 9.39 | 20 |
| 80 | 3 | 89.1 | 5.5 | 11.3 | 40 |
| 80 | 3 | 89.1 | 6.6 | 13.4 | 60 |
| 80 | 3 | 89.1 | 7.6 | 15.3 | 80 |
| 90 | 3 1/2 | 101.6 | 4.5 | 10.8 | 20 |
| 90 | 3 1/2 | 101.6 | 5.7 | 13.5 | 40 |
| 90 | 3 1/2 | 101.6 | 7.0 | 16.3 | 60 |
| 90 | 3 1/2 | 101.6 | 8.1 | 18.7 | 80 |
| 100 | 4 | 114.3 | 4.9 | 13.2 | 20 |
| 100 | 4 | 114.3 | 6.0 | 16.0 | 40 |
| 100 | 4 | 114.3 | 7.1 | 18.8 | 60 |
| 100 | 4 | 114.3 | 8.6 | 22.4 | 80 |
| 125 | 5 | 139.8 | 5.1 | 16.9 | 20 |
| 125 | 5 | 139.8 | 6.6 | 12.7 | 40 |
| 125 | 5 | 139.8 | 8.1 | 26.3 | 60 |
| 125 | 5 | 139.8 | 9.5 | 30.5 | 80 |
| 150 | 6 | 165.2 | 5.5 | 21.7 | 20 |
| 150 | 6 | 165.2 | 7.1 | 27.7 | 40 |
| 150 | 6 | 165.2 | 9.3 | 35.8 | 60 |
| 150 | 6 | 165.2 | 11.0 | 41.8 | 80 |
| 200 | 8 | 216.3 | 6.4 | 33.1 | 20 |
| 200 | 8 | 216.3 | 7.0 | 36.1 | 30 |
| 200 | 8 | 216.3 | 8.2 | 42.1 | 40 |
| 200 | 8 | 216.3 | 10.3 | 52.3 | 60 |
| 200 | 8 | 216.3 | 12.7 | 63.8 | 80 |
| 250 | 10 | 267.4 | 6.4 | 41.2 | 20 |
| 250 | 10 | 267.4 | 7.8 | 49.9 | 30 |
| 250 | 10 | 267.4 | 9.3 | 59.2 | 40 |
| 250 | 10 | 267.4 | 12.7 | 79.8 | 60 |
| 250 | 10 | 267.4 | 15.1 | 93.9 | 80 |
| 300 | 12 | 318.5 | 6.4 | 49.3 | 20 |
| 300 | 12 | 318.5 | 8.4 | 64.2 | 30 |
| 300 | 12 | 318.5 | 10.3 | 78.3 | 40 |
| 300 | 12 | 318.5 | 14.3 | 107 | 60 |
| 300 | 12 | 318.5 | 17.4 | 129 | 80 |
| 350 | 14 | 355.6 | 6.4 | 55.1 | 10 |
| 350 | 14 | 355.6 | 7.9 | 67.7 | 20 |
| 350 | 14 | 355.6 | 9.5 | 81.1 | 30 |
| 350 | 14 | 355.6 | 11.1 | 94.3 | 40 |
| 350 | 14 | 355.6 | 15.1 | 127 | 60 |
| 350 | 14 | 355.6 | 19.0 | 158 | 80 |
| 400 | 16 | 406.4 | 6.4 | 63.1 | 10 |
| 400 | 16 | 406.4 | 7.9 | 77.6 | 20 |
| 400 | 16 | 406.4 | 9.5 | 93.0 | 30 |
| 400 | 16 | 406.4 | 12.7 | 123 | 40 |
| 400 | 16 | 406.4 | 16.7 | 160 | 60 |
| 400 | 16 | 406.4 | 21.4 | 203 | 80 |
| 450 | 18 | 457.2 | 6.4 | 71.1 | 10 |
| 450 | 18 | 457.2 | 7.9 | 87.5 | 20 |
| 450 | 18 | 457.2 | 11.1 | 122 | 30 |
| 450 | 18 | 457.2 | 14.3 | 156 | 40 |
| 450 | 18 | 457.2 | 19.0 | 205 | 60 |
| 450 | 18 | 457.2 | 23.8 | 254 | 80 |
| 500 | 20 | 508.0 | 6.4 | 79.2 | 10 |
| 500 | 20 | 508.0 | 9.5 | 117 | 20 |
| 500 | 20 | 508.0 | 12.7 | 155 | 30 |
| 500 | 20 | 508.0 | 15.1 | 184 | 40 |
| 500 | 20 | 508.0 | 20.6 | 248 | 60 |
| 500 | 20 | 508.0 | 26.2 | 311 | 80 |
| 550 | 22 | 558.8 | 6.4 | 87.2 | 10 |
| 550 | 22 | 558.8 | 9.5 | 129 | 20 |
| 550 | 22 | 558.8 | 12.7 | 171 | 30 |
| 550 | 22 | 558.8 | 15.9 | 213 | 40 |
| 600 | 24 | 609.6 | 6.4 | 95.2 | 10 |
| 600 | 24 | 609.6 | 9.5 | 141 | 20 |
| 600 | 24 | 609.6 | 14.3 | 210 | 30 |
| 650 | 26 | 660.4 | 7.9 | 127 | 10 |
| 650 | 26 | 660.4 | 12.7 | 203 | 20 |
JIS G 3454 The tolerances pikeun diaméter luar, ketebalan témbok, eccentricity, sarta panjang wajib minuhan sarat handap.
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