TU 14-3-190-2004. Seamless steel pipes for boiler plants and pipelines
Are you interested in TU 14−3-190−2004 «Seamless steel pipes for boiler plants» from the supplier — Avek Glob? We guarantee high quality products and a large selection of rolled metal products with worldwide delivery.
Application area
These standard specifications apply to seamless carbon steel pipes used for boiler plants and pipelines. Pipes are made from rolled and forged blanks.
Assortment
The dimensions of the pipes must meet the requirements, which are set out in GOST 8734−75 and GOST 8732−78. Hot-deformed pipes are supplied from steel 10 with the largest outside diameter up to 325 mm and wall thickness 16 mm, and steel 20 with the largest outer diameter up to 426 mm and wall thickness 18 mm.
Supplier — AvekGlob Company — offers at a reasonable price from the manufacturer a diverse range of cold-formed seamless pipes that meet the technical requirements of domestic and foreign standards. The supplier guarantees the timely delivery of products to any address specified by the consumer.
Mechanical properties
Must comply with the data shown in the table:
| steel grade | Limit of time resistance, MPa | Yield strength, MPa | Relative extension, % | Relative narrowing of the cross-sectional area,% | Impact strength, kJ / cm 2 |
| 10 | 343… 500 | 206 | 24 | 55 | 49 |
| 20 | 412… 568 | 245 | 21 | 45 | 49 |
The yield point at 350 ° C must correspond to:
— for steel 10 not less than 118 MPa;
— for steel 20 not less than 157 MPa.
Pipes must withstand the hydraulic pressure specified in GOST 3845−75. Pipes with a wall thickness of 12 mm or more are inspected for microstructure, and pipes with an outside diameter of 22 to 108 mm are tested for flattening and testing for distribution. Pipes with diameters in excess of 108 mm are subjected to a bend test. Other technical requirements are as specified in GOST 8734−75 and GOST 8732−78.
On the surface of pipes there should be no cracks, sunsets and other defects. Small necks, scales and other irregularities that do not interfere with inspection are allowed. Trace marks should not display pipe dimensions beyond the limit values. At the request of the customer, the surface of the pipes can be cleaned of scale.
Supplier — AvekGlob Company — offers to purchase various profiles from seamless hot-deformed pipes that meet technical standards and quality requirements. Products can be bought at a price formed on the basis of European and world standards of production. Implementation is possible in bulk and retail, for regular customers, a flexible system of discounts operates.