Stainless Steel Seamless Pipe

Material: 

Such as OCR13 stainless steel, OCR18NI9 stainless steel, etc.

Dimensions：

The outer diameter and wall thickness range of stainless steel seamless pipes are as follows:

Outer diameter: small diameter (6-20mm), medium diameter (20-100mm), larger diameter (100-300mm), large diameter (300mm and above). Specific sizes include 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 25mm, 28mm, 30mm, 32mm, 34mm, 38mm, 40mm, 42mm, 45mm, 48mm, 50mm, 51mm, 57mm, 60mm, 63mm, 65mm, 70mm, 73mm, 76mm, 80mm, 83mm, 89mm, 90mm, 95mm, 100mm, etc. 1.

Wall thickness: thin wall (0.4-2mm), medium wall thickness (2-10mm), thick wall (10-30mm or even thicker). Specific sizes include 0.4mm, 0.5mm, 1.0mm, 1.5mm, 2.0mm, 2.5mm, 3.0mm, 3.5mm, 4.0mm, 4.5mm, 5.0mm, 6.0mm, 6.5mm, 7.0mm, 8.0mm, 9.0mm, 10.0mm, etc.

Description：

Stainless steel seamless pipe is a long steel strip with a hollow cross section and no seams around it. It is a steel pipe that is resistant to corrosion by weak corrosive media such as air, steam, and water, and chemically corrosive media such as acids, alkalis, and salts. It is also called stainless acid-resistant steel pipe.

Common materials include 304, 304L, 304H, 316, 316L, 317, 317L, 321, 347, 347H, etc.

Hot-rolled steel pipe: The length is generally 1.5 to 10 meters, the diameter ranges from 54 to 480 mm, and the wall thickness is 4.5 to 45 mm. 12.

Cold-drawn (rolled) steel pipe: The length is generally 1.0 to 7 meters, and the wall thickness is 0.5 to 1.0 mm. The length is 1.0 to 7 meters; the length is 1.5 to 8 meters for wall thickness greater than 1.0 mm, the diameter ranges from 6 to 200 mm, and the wall thickness is 0.5 to 21 mm.

The installation of seamless stainless steel pipes usually requires the following steps:

‌Cutting and trimming‌: Cut the steel pipe according to the required length and perform necessary trimming to ensure that the interface is flat.

‌Connection‌: Use appropriate connection methods such as welding, threaded connection or flange connection to ensure that the connection is firm and well sealed.

‌Fixation‌: Use brackets or clamps to fix the steel pipe to prevent movement or vibration during use.

The technical parameters of seamless stainless steel pipes mainly include density, mechanical properties and specifications. ‌

Density

The density of seamless stainless steel pipes is usually 7.93kg/dm³‌1.

Mechanical properties

The mechanical properties of seamless stainless steel pipes include tensile strength, yield strength, elongation and hardness. For example, the tensile strength of 12Cr18Ni9 seamless stainless steel pipe is ≥520MPa, the yield strength is ≥205MPa, the elongation is ≥40%, and the hardness is ≤187HB, ≤90HRB, ≤200HV‌.

Specifications

The specifications of seamless stainless steel pipes include outer diameter and wall thickness. For example, the outer diameter of seamless pipes ranges from 3-577mm and the wall thickness is 0.4-14mm; the outer diameter of welded pipes ranges from 6-219mm and the wall thickness is 0.3-4.0mm‌1. In addition, the diameter and wall thickness of stainless steel seamless pipes also have specific ranges, such as the diameter of hot-rolled steel pipes is 54-480mm and the wall thickness is 4.5-45mm; the diameter of cold-drawn steel pipes is 6-200mm and the wall thickness is 0.5-21mm.

Application fields

Stainless steel seamless pipes are widely used in industrial pipelines such as petroleum, chemical, medical, food, light industry, mechanical instruments, and mechanical structural components. Due to its corrosion resistance and high mechanical strength, it is also often used to manufacture mechanical parts and engineering structures.