Welded elbows acc. to OST 36-22-77 and OST 34.10.753-97
OST 36-22-77 elbows
Details of pipelines Du 500-1400 mm welded of carbon steel Ru 2.5 MPa (~ 25 kg/cm2). Reducers concentric and eccentric.
OST 34.10.753-97 Elbows
Parts and Assembly units of pipelines of TPP on Ru< 2.2 MPa (~ 22 kg/cm2), temperature = 425°C welded sheet with concentric and eccentric transitions in carbon steels for pipelines of TPP.
The design and dimensions of welded sheet of concentric transitions must correspond to the indications given in Figure 1 and table 2.
Drawing 1, sheet 1.A –A Preparing of fens for welding
Drawing 1, sheet 2
Table 2
The design and dimensions of welded sheet eccentric transitions must correspond to the indications given in Figure 2 and table 3.
Preparing of fens for welding Drawing 2, Sheet 1
Drawing 2, sheet 2
Table 3
Designation
An example of a symbol of the welded concentric with bores Du 600 mm and 300 mm do on nominal pressure Ru 1.6 Mpa: 600-300-1.6 25 OST 34 10.753 97.
An example of a symbol of the weld transition with an eccentric bores Du 1600 mm and 1400 mm for do rated pressure 1.6 Mpa: 1600-1400-1.6 100 OST 34 10.753-97.
Переход 820х630
