Tu 14-3-843-79. Tubes made of VT-1-0, OT4, OT4-1 alloys according to Ost 1 90050-72. Special thin-walled tubes from titanium-based alloys PT-1M, PT-7M
1. SORTMENT
1.1 Dimensions of BT1-00, BT1-0 and OT4-0 grade alloy pipes shall meet the following requirements. Table 1
| Outer diameter, mm | Wall thickness, mm | mm | mm | mm | mm | mm mm |
|---|---|---|---|---|---|---|
| 1,0 | 1,5 | 2,0 | 2,5 | 3,0 | 3,5 | 4,0 |
| 6 | 4,0 | |||||
| 8 | 4,0 | |||||
| 10 | 4,0 | |||||
| 12 | 4,0 | |||||
| 14 | 4,0 | |||||
| 16 | 4,0 | |||||
| 18 | 4,0 | 4,0 | ||||
| 20 | 4,0 | 4,0 | ||||
| 22 | 4,0 | 4,0 | 4,0 | |||
| 24 | 4,0 | 4,0 | 4,0 | 4,0 | ||
| 25 | 4,0 | 4,0 | 4,0 | 4,0 | ||
| 26 | 4,0 | 4,0 | 4,0 | 4,0 | ||
| 27 | 4,0 | 4,0 | 4,0 | 4,0 | ||
| 28 | 4,0 | 4,0 | 4,0 | 4,0 | ||
| 30 | 4,0 | 4,0 | 4,0 | 4,0 | ||
| 32 | 4,0 | 4,0 | 4,0 | |||
| 35 | 4,0 | 4,0 | 4,0 | |||
| 38 | 4,0 | 4,0 | 4,0 | |||
| 40 | 4,0 | 4,0 | 4,0 | |||
| 42 | 4,0 | 4,0 | 4,0 | |||
| 45 | 4,0 | 4,0 | 4,0 | |||
| 46 | 4,0 | 4,0 | 4,0 | |||
| 48 | 4,0 | 4,0 | 4,0 | |||
| 50 | 4,0 | 4,0 | 3,5 | |||
| 52 | 4,0 | 3,5 | ||||
| 54 | 4,0 | 3,5 | ||||
| 56 | 4,0 | 3,5 | ||||
| 60 | 3,5 | 2,5 | ||||
| 62 | 3,5 | 2,5 |
a/ of off-gauge length from 0.5 m to the value specified in Table 1.
b/ Of measured length and multiples thereof within the unmeasured length.
Allowable deviation in measured length shall not exceed + 15 mm.
Pipes of multiple straight length are supplied with 5 mm allowance for each cut and with + 15 mm tolerance on the total bottom.
1.6 Pipe sizes, grade and accuracy of manufacture are specified in the purchase order.
2. TECHNICAL REQUIREMENTS
2.1 Chemical composition of pipe material shall meet the requirements of OCT1 90013-71.
2.2 Tubes shall be supplied annealed and etched.
2.3 Pipes outer and inner surface shall be clean, without cracks, delaminations, pits, scale and grease residues, etch rash, rough scraping marks, deep cuts and other rough surface defects.
The presence of different surface tints, as well as cross-ring and spiral traces of technological processing is not a rejection feature.
2.4 There shall be no altered layer on the pipe surface.
2.5 Pipes shall be evenly trimmed and free of burrs.
2.6 Ovality and variation in pipe size shall not exceed the outer diameter and wall thickness limits, respectively.
2.7 Pipe curvature on any length / no less than 1 m/ shall not be greater than:
tubing of BT1-00, BT1-0 and OT4-0 grades with a diameter of up to 35 mm - 1 mm per 1 m;
tubing made of BT1-00, BT1-0 and OT4-0 alloys with the diameter exceeding 35 mm and tubing made of OT4-I and OT4 alloys of all dimensions - 2 mm per 1 m length.
Overall curvature shall not be more than product of the allowable curvature per 1 meter for the total pipe length in meters.
2.8 Mechanical properties of pipe in delivery condition shall meet the following requirements.
| Grade of alloy | Tensile strength, kgf/mm2 | d5 |
|---|---|---|
| ВТ1-00 | 30-45 | 20 |
| VT1-0 | 40-55 | 15 |
| OT4-0 | 50-65 | 15 |
| OT4-1 | 60-75 | 12 |
| OT4 | 70-85 | 10 |
d5 - Relative elongation at break.
2.9 Titanium pipes shall withstand hydraulic pressure test.The value of allowable stress "P" in the hydraulic pressure test of pipes is set:
for tubes of BT1-00, BT1-0 and OT4-0 alloy grades - 17 kGf/mm2;
22 kgf/mm2 for OT4-I and OT4 alloy grade tubing.
2.10. Pipes of BT1-00, BT1-0, OT4-0 and OT4-1 grades with diameter up to 40 mm must withstand upsetting test on mandrel with taper rate of 1:10 till increase of outer diameter by 10 %. Tubes made of OT4 grade alloy with a diameter of up to 40 mm shall withstand a handout test by an amount to be specified by agreement of the parties.
2.11. Pipes shall pass the flattening test to the distance between flattened surfaces as agreed by the parties.
Supplier
We offer to buy titanium tubes especially thin-walled from specialized warehouses of the supplier Evek GmbH with delivery in any city. Full compliance with modern quality standards. The supplier Evek GmbH offers to buy extremely thin-walled titanium tubes at the best price in the product segment. Timely delivery is provided by representative offices in Eastern European cities.
Buy, favourable price
We offer titanium tubes especially thin-walled, the price - determined by the technological features of production without the inclusion of additional costs. The site of the company displays information on the latest arrivals of products. It is possible to order products with non-standard parameters. We have the best price-quality ratio for the whole range of products. In the segment of titanium alloys Evek GmbH is a profitable supplier.
