Oleo Tecnica CETOP Butt-Weld Stubs
Oleo Tecnica CETOP Butt-Weld Stubs ensure a safe and reliable connection for industrial hydraulic systems. Available in Series 250 and Series 400 pressure classes, they feature 37° beveled ends for precise butt welding on rigid piping. They can be configured in A105 carbon steel (or equivalent) and AISI 316L stainless steel, both in the version with an O-Ring seat and in the flat version without a seat.
The available product codes are: COD38ST250, COD12ST250, COD34ST250, COD1ST250, COD114ST250, COD112ST250, COD2ST250, COD212ST250, COD3ST250, COD312ST250, COD4ST250, COD4ST250 OR6387, COD38ST400, COD12ST400, COD34ST400, COD1ST400, COD114ST400, COD112ST400, COD2ST400, COD212ST400, COD212ST400 OR6275, COD3ST400, COD3ST400 OR6300, COD312ST400, COD4ST400, COD4ST400 OR6350 (and the corresponding AISI 316L versions with the CODX prefix and versions without O-Ring seat with the STC suffix).
Oleo Tecnica CETOP Butt-Weld Stubs are key components for creating leak-tight, deformation-resistant flanged joints on medium- and high-pressure hydraulic lines. Precision machining includes preparation of the joint edge with a calibrated 37° bevel, ideal for full-penetration butt welding on metal pipes ranging from 3/8″ up to 4″.
The product range includes two main material options:
The components can be ordered with a front profile featuring an O-Ring groove or with a flat face without an O-Ring seat, allowing flanged coupling in compliance with CETOP dimensional requirements.
The Oleo Tecnica catalogue divides the butt-weld stubs into two standardized pressure series:
The maximum recommended working pressure is based on the technical parameters of the matching clamping flange. The actual maximum working pressure of the entire system is nevertheless determined by the wall thickness and metallurgical quality of the welded pipe steel.
Models with a front groove accommodate specific O-Ring seals for each nominal size. In Series 250, the elastomeric sealing range includes standard O-Ring codes from 3068 up to 4387, as well as a specific 4″ version with the larger OR6387 seal. In Series 400, due to higher hydraulic loads, standard seals from OR 3068 to OR 4337 are used, together with special larger configurations: OR6275 on the 2″1/2 size, OR6300 on the 3″ size and OR6350 on the 4″ version.
The unique Oleo Tecnica coding system allows the required system variants to be configured precisely:
| Characteristic | Value |
|---|---|
| Interface Standard | CETOP |
| Welding Type | Butt weld (37° bevel) |
| Available Pressure Series | Series 250 (250 Bar) / Series 400 (400 Bar) |
| Construction Materials | A105 steel or equivalent / AISI 316L stainless steel |
| Front Sealing Configurations | With O-Ring seat (…ST) / Without O-Ring seat (…STC) |
| Nominal Size Range | From 3/8″ to 4″ |
| Pressure Limiting Factor | Based on the flange; working pressure determined by pipe thickness and material |
| Series | Max Pressure (Bar) | Size | Type Code (A105 with OR Seat) | Dim. A (mm) | Dim. B (mm) | Dim. C (mm) | Dim. D (mm) | Dim. E (mm) | Dim. F (mm) | O-Ring Type | Weight (kg) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Series 250 | 250 | 3/8″ | COD38ST250 | 18 | 12,5 | 24,5 | 18 | 30 | 7,3 | 3068 | 0,05 |
| Series 250 | 250 | 1/2″ | COD12ST250 | 22 | 15 | 30,2 | 24 | 30 | 7,3 | 4075 | 0,07 |
| Series 250 | 250 | 3/4″ | COD34ST250 | 28 | 20 | 38,1 | 31,5 | 35 | 7,3 | 4100 | 0,13 |
| Series 250 | 250 | 1″ | COD1ST250 | 35 | 25 | 44,4 | 38 | 40 | 8,6 | 4131 | 0,21 |
| Series 250 | 250 | 1″1/4 | COD114ST250 | 43 | 32 | 50,8 | 43 | 45 | 8,6 | 4150 | 0,27 |
| Series 250 | 250 | 1″1/2 | COD112ST250 | 50 | 38 | 60,3 | 50 | 50 | 8,6 | 4187 | 0,39 |
| Series 250 | 250 | 2″ | COD2ST250 | 62 | 47 | 71,4 | 62 | 60 | 10,6 | 4225 | 0,69 |
| Series 250 | 250 | 2″1/2 | COD212ST250 | 76 | 58 | 87,2 | 76 | 70 | 10,6 | 4275 | 1,16 |
| Series 250 | 250 | 3″ | COD3ST250 | 90 | 70 | 101,6 | 90 | 80 | 10,6 | 4337 | 1,73 |
| Series 250 | 250 | 3″1/2 | COD312ST250 | 102 | 80 | 119,0 | 102 | 90 | 19,0 | 4337 | 2,67 |
| Series 250 | 250 | 4″ | COD4ST250 | 114 | 90 | 131,0 | 114 | 105 | 22,5 | 4387 | 3,75 |
| Series 250 | 250 | 4″ | COD4ST250 OR6387 | 114 | 90 | 131,0 | 114 | 105 | 22,5 | 6387 | 3,75 |
| Series 400 | 400 | 3/8″ | COD38ST400 | 18 | 11 | 26,0 | 18 | 35 | 8,4 | 3068 | 0,07 |
| Series 400 | 400 | 1/2″ | COD12ST400 | 22 | 14 | 31,8 | 24 | 40 | 8,4 | 4075 | 0,11 |
| Series 400 | 400 | 3/4″ | COD34ST400 | 28 | 18 | 39,5 | 32 | 45 | 9,4 | 4100 | 0,20 |
| Series 400 | 400 | 1″ | COD1ST400 | 35 | 22 | 47,6 | 38 | 50 | 10,1 | 4131 | 0,32 |
| Series 400 | 400 | 1″1/4 | COD114ST400 | 44 | 29 | 54,0 | 44 | 55 | 10,9 | 4150 | 0,44 |
| Series 400 | 400 | 1″1/2 | COD112ST400 | 51 | 35 | 63,5 | 51 | 60 | 13,2 | 4187 | 0,63 |
| Series 400 | 400 | 2″ | COD2ST400 | 61 | 43 | 79,4 | 67 | 70 | 13,7 | 4225 | 1,21 |
| Series 400 | 400 | 2″1/2 | COD212ST400 | 80 | 53 | 94,2 | 80 | 80 | 17,6 | 4275 | 2,04 |
| Series 400 | 400 | 2″1/2 | COD212ST400 OR6275 | 80 | 53 | 94,2 | 80 | 80 | 17,6 | 6275 | 2,04 |
| Series 400 | 400 | 3″ | COD3ST400 | 90 | 58 | 104,0 | 90 | 90 | 17,6 | 4275 | 2,93 |
| Series 400 | 400 | 3″ | COD3ST400 OR6300 | 90 | 58 | 104,0 | 90 | 90 | 17,6 | 6300 | 2,93 |
| Series 400 | 400 | 3″1/2 | COD312ST400 | 102 | 63 | 119,0 | 102 | 90 | 19,0 | 4275 | 4,00 |
| Series 400 | 400 | 4″ | COD4ST400 | 114 | 74 | 131,0 | 114 | 105 | 22,5 | 4337 | 5,45 |
| Series 400 | 400 | 4″ | COD4ST400 OR6350 | 114 | 74 | 131,0 | 114 | 105 | 22,5 | 6350 | 5,45 |