Hot-rolled seamless pipe
Advantages
OE pipes can operate within a temperature range of -65 to +425°C and, due to their thicker wall, operate at higher pressures than cold-rolled pipes. The H/O pipes are more durable, corrosion-resistant, wear-resistant, while meeting the most stringent sanitary standards and have an attractive appearance. these pipes are reliable, durable, and the possibility of recycling recycled scrap further increases their cost-effectiveness.
Disadvantages
Almost the only disadvantage is the higher cost of these pipes.
Manufacturing
Material for g/d pipes is steel alloys (GOST: 1050-88; 4543-71; 19 281-89 and 380-88). Allotment is determined by
| Quality | GOST | Note |
|---|---|---|
| А | 380-88 | Of steel St2sp, St4sp, St5sp, St6sp with rated strength properties |
| Б | 380-88, 1050, 4543, 19 281 | With standardization of chemical composition of mild steel |
| В | 380-88, 1050, 4543, 19 281 | With standardization of strength properties and chemical composition |
| Г | 1050, 4543 и 19 281 | With standardization of chemical composition and strength control of heat-treated samples. |
| Д | - | Without strength and chemical composition standardization, but with standardization of permissible hydraulic pressure. |
| To/s ratio. | Name |
|---|---|
| 12,5 - 40 | Thin-walled seamless pipes |
| 6 - 12,5; | Thick-walled Seamless |
| Up to 6 | Heavy-walled seamless |
Seamless Steel Seamless H/W Pipes Outer Diameter: 45-220 mm. Wall Thickness: 3.5-25 mm. Thick-walled pipes are produced heat-treated, they can be welded or solid drawn.
| In terms of manufacturing precision (external diameter and wall thickness) | Sectional shape | By length |
|---|---|---|
Normal accuracy High accuracy B high |
Round, Square rectangular |
Out of gauge: 4 - 12,5 m; M -; measured length: within the unmeasured CR - a multiple of measured: within the measured limit with an allowance for each cut of 5 mm; Approximate - within the off-measure; OG - limited. |
An example of marking a tube with outer diameter of 185 mm, wall thickness of 3,5 mm, of off-gauge length, regular production accuracy, of steel St2sp, steel grade 1, quality, A
185x3,5
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А St2sp
An example of tube marking with 120 mm outer diameter, 2.5 mm wall thickness, 5 000 mm length, with usual thickness accuracy and increased diameter accuracy, made of 09G2S steel:
120p x 2,5x5000
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09G2S
Tube 200v´5v´2000kr - 08X18N10T
Steel pipes with special properties
Pipes are made of alloy steels according to (GOST 30 564-98) from steel 10, 20 (GOST 1050-88); 10G2, 30KhMA, 15KhM (GOST 4543-7); pipe 09G2S (GOST 19 281-89); 10G2A. Low-alloy structural steel seamless pipe 09G2S is the most popular today.
Application of pipes
Seamless hot-rolled steel pipes are relevant in the manufacture of welded communications, designed for considerable pressure and temperature from -70 to +425 ° C. Thick-walled pipes are popular not only in household sanitary and sewage systems, but are also used in industrial circuits for high pressure gas/liquid transportation. Good thermal conductivity of such pipes is important in heating systems. Longevity, high reliability and moderate price make them highly cost-effective for any piping.
Supply
We supply certified steel pipes at optimum prices. The assortment is normalized
Buy at a bargain price
All the tubular goods sold by Evek GmbH comply with GOST and international quality standards. We deliver rolled tubes of standard and non-standard sizes in the shortest terms. High quality, reasonable prices and a wide choice of products determine the face of our company. By becoming our regular customer you can count on a system of discount discounts. Cooperation with us will help you realize any engineering plans. We are waiting for your orders on our site.