(1) Material of casing joint group:
Production of 25CrMo forgings (heat treatment, digital multi-axis precision machining, high-frequency quenching and tempering), executive standard: GB/T3077-1999.
(2) Perform flaw detection on the casing joint blank and issue a flaw detection report.
(3) Casing joint group:
|
Specification |
Work level |
Number of screws |
Number of keyways |
|
Ø980*50mm |
700 mm |
12 |
6 |
|
Ø1180*50mm |
700 mm |
12 |
6 |
|
Ø1280*50mm |
700 mm |
12 |
6 |
|
Ø1380*50mm |
700 mm |
12 |
6 |
|
Ø1480*50mm |
700 mm |
16 |
4 |
|
Ø1800*50mm |
700 mm |
20 |
5 |
|
Ø1980*50mm |
700 mm |
20 |
5 |
|
Ø2200*60mm |
700 mm |
20 |
5 |
|
Ø2400*60mm |
700 mm |
24 |
6 |
|
Ø2600*60mm |
740 mm |
24 |
6 |
|
Ø2800*60mm |
740 mm |
32 |
8 |
|
Ø3000*70mm |
740 mm |
32 |
8 |
|
Ø3200*70mm |
740 mm |
32 |
8 |
|
Ø3500*75mm |
740 mm |
40 |
10 |
(4) Size:
Tolerance of casing joint processing ovality ≤0.5mm.
