AS 1074The AS 1074 standard is an Australia and New Zealand standard that sets out the requirements for steel pipes to be used in ordinary service. This joint standard covers both threaded and plain end pipes suitable for screwing as specified in AS 1722.1, and of DN 8 to DN 150 inclusive (nominal size). Wall thicknesses are designated as Light (lightest), Medium (medium), and Heavy (heaviest). The requirements for steel pipes include mechanical properties, dimensional tolerances, and strength classifications. In addition, the standard requires that steel pipes be properly marked with the manufacturer’s name or trademark. The AS/NZS 1074 pipe standard is an important part of ensuring that steel pipes used in ordinary applications meet the necessary safety and quality requirements. By adhering to this standard, manufacturers can ensure that their products are safe and fit for purpose. This in turn helps to protect consumers and ensure that they can have confidence in the products they purchase. Ultimately, the AS/NZS 1074 pipe standard helps to create a level playing field for all manufacturers of steel pipes. This ensures that everyone is held to the same high standards and that only products of the highest quality are made available to consumers. QUOTE NOW Why choose tuspipe? Since 1998, Tianjin United Steel Pipe Co., Ltd (TUSPIPE) has been committed to supplying high-quality line pipes. With over 500,000 tons annual production capacity, the company serves various fields and industries, such as oil & gas exploitation and transmission, ship & auto-building, water & electricity, environmental protection, mechanical engineering, infrastructure construction and etc. TUSPIPE places a premium on product quality and rigorous product quality control. In order to maintain good product quality, the company has established a Test & Inspection Center since 2004. With a series of state-of-the-art tests and inspection equipment, the test & inspection center is able to perform the tensile tests, hydro tests, impact tests, DWTT, etc. view more Chemical Composition of AS 1074 Steel Pipe The tubes shall be manufactured from steel which has a sulfur content of not more than 0.045 percent and phosphorus content of not more than 0.045 percent. The carbon equivalent, as calculated from the following equation, shall not exceed 0.4: Carbon Equivalent = C + Mn/6
|Elements of AS/NZS 1074 Pipes||Max %|
|AS/NZS 1074 Mechanical Properties||Minimum Requirement|
|Yield Strength (MPa)||195|
|Tensile Strength (MPa)||320|
|Size||Class||O.D. (mm)||W.T. (mm)||Weight (Plain End) (kg/mtr.)||Weight (Socketed) (kg/mtr.)||Pcs/Bundle|
|AS 1074 Manufacturing Parameter||Tolerances|
|Outer Diameter||See the Dimension Table Above|
|Wall Thickness||-8%, +unlimited (Light)|
|-10%, +unlimited (Medium and Heavy)|
|Straightness||0.20% of Total Length|
|Unit Length||± 0.08m|
In order to ensure the Screw threads of all threaded tubes comply with AS 1722.1, it is essential that the fitting allowance plus gauge length for pipe threads of series R and RC for the particular nominal size, does not exceed 80% of the sum of the Light tube’s basic length of useful thread. In some cases, low limits of outside diameter can result in “black” threads (perfect at the root and imperfect at the crest), but these should not be regarded as justification for rejection of the tubes. All tubes shall be supplied threaded with taper pipe threads.Test and Inspections of AS 1074
– Leak Tightness Test
- Online NDT
– Bending TestTubes are an essential part of many industrial applications, and it is important that they be able to withstand certain loads and stresses. One such test is the bending test, which determines a tube’s ability to resist fracture or failure under duress.
- Tubes ≤ DN50 – The test is carried out by placing the tube in a bending machine, with the weld at a 90 degree angle to the plane of bending. The tube is then bent cold around a former with a radius that is appropriate for the particular tube being tested. For ungalvanized tubes, this radius should be equal to 6 times the outside diameter of the tube; for galvanized tubes, it should be 8 times the outside diameter of the tube. If the tube does not crack or show any signs of failure during this process, it is considered to have passed the test.
- Tubes ＞ DN50 – According to the given specifications, for finished tubes that are larger than DN50 in diameter, rings cut from the end of the selected tubes must be at least 40mm in length and be able to be flattened between two parallel plates. The weld, if there is one, should be at a 90 degree angle in relation to the point of maximum bending. Additionally, no opening or fracture should occur in the weld until the distance between the plates is less than 75% of the original outside diameter of the tube. There should also be no cracks or breaks in the metal occurring elsewhere until the distance between the plates is less than 60% of the original outside diameter of the tube. As appropriate, test rings may have their inner and outer edges rounded.