Seamless steel pipes are widely used in the field of fluid transportation. AS the main product of seamless steel pipes, GB/T14976-1994 standards are often used in the manufacture and inspection of seamless steel pipes.
GB/T14976-1994 stainless steel seamless steel pipe is a kind of stainless steel seamless steel pipe manufactured in accordance with the national standard. It is widely used in heat exchange equipment such as petrochemical and thermal power.The stainless steel seamless steel pipe is made of steel ingot or solid tube blank through perforation, and then manufactured by hot rolling, cold rolling or cold drawing. Its approximate wall thickness and outer diameter are determined by its mechanical properties.
GB/T14976-1994 stainless steel seamless steel pipe is usually made of austenitic stainless steel and its internal performance is stable. Its strength and toughness are relatively low and the welding performance is excellent. During transportation and installation, its pipe surface is usually treated with anti-corrosion treatment.
GB/T14976-1994 seamless steel pipes for stainless steel have certain special quality requirements. Firstly, the purifying pipe outside the pipe should be ±1 mm within the minimum wall thickness tolerance range. Secondly, the minimum wall thickness should be allowed to be 0.36 mm, and the maximum wall thickness should not exceed the nominal wall thickness value by more than 0.8 mm. Thirdly, the surface quality of the inner and outer surfaces of the tube should be in accordance with the required standards and the cross section corner radius should not exceed 0.25 times the wall thickness.
GB/T14976-1994 stainless steel seamless steel pipes for fluid transportation have certain signs for cold-drawn seamless tubes or cold-rolled seams. This sign is marked by a capital A, a capital C, two figures representing the grade of the steel and a three-digit number with a ×× diameter (unit: mm) respectively. For example, “A312—50×2” represents an austenitic stainless steel grade 312 seamless steel pipe with an outer diameter of 50 mm and a wall thickness of 2 mm.
In conclusion, GB/T14976-1994 stainless steel seamless steel pipes are among the most widely used steel pipes. It is an important basic material used in the large-scale production and application of petrochemical, thermal power and other industrial fields. It is of great significance to realize the much-needed fluid transmission for the entire industry. Its superior manufacturing level ensures that all pipeline construction projects are successful.
