aS/NZS 1074


AS/NZS 1074 Steel Pipe

Discover the pinnacle of steel tube engineering with our AS/NZS 1074 threaded steel tubes and tubulars. These tubes are not just steel tubes; they are meticulously designed to meet the stringent requirements of AS 1722.1, ensuring unparalleled quality and performance. With nominal sizes ranging from DN 8 to DN 150, you have the flexibility to choose the perfect fit for your specific needs. Our tubes come in three distinct wall thicknesses: Light, Medium, and Heavy, each catering to different applications and load-bearing capacities. When you choose our AS/NZS 1074 tubes, you’re investing in a product that offers durability, reliability, and versatility, all while adhering to international standards.

AS/NZS 1074 Specification

When it comes to specifications, our AS/NZS 1074 tubes leave no room for compromise. The dimensions are meticulously crafted to fit nominal sizes from DN 8 to DN 150. Our production procedures follow stringent quality checks, ensuring that each tube meets the highest standards. You can select from various steel grades, each offering unique mechanical properties and corrosion resistance. Surface coatings are available to enhance durability and aesthetic appeal. Choose from different end types and joint methods to suit your installation needs. Additionally, we offer specialized machining services to customize your tubes further, making your project seamless and efficient.

Production StandardAS 1074
Manufacturing ProcessesERW (Electric Resistance Welding)
SMLS (Hot Finished / Cold Drawn Seamless)
Outside Diameter13.7mm – 164.1mm (1/4″ – 6″)
Wall Thickness1.8mm – 5.4mm (Light Medium Heavy)
Pipe Length5 – 18 mtrs
Steel Grade≥Q195
Corrosion PreventionBare, Varnishing, Hot Dip Galvanizing
End ProcessesSquare Cut, Bevelling, Threading, Grooving
Further ProcessingWelding, Bending, Hole Drilling, Punching, Swaging, Tapering, Flaring, Expanding

AS/NZS 1074 Dimension Table


Understanding dimensions is crucial for selecting the right tube for your project. Our AS/NZS 1074 tubes come in nominal sizes ranging from DN 8 to DN 150, offering you a broad spectrum of choices. Each size category is further divided into three wall thicknesses: Light, Medium, and Heavy. This granularity in dimensions allows you to pick the tube that precisely meets your load-bearing and installation requirements. With our comprehensive dimension table, you’ll find it effortless to match your project’s needs with the perfect tube dimensions.

Dimensions Of Steel Tubes — Heavy
Nominal sizeOutside diameter mmThickness mmMass of black tube kg/m
Min.Max.Plain or screwed endsScrewed and socketed
DN 813.313.92.90.7650.769
DN 1016.817.
DN 1521.
DN 2026.627.23.21.871.88
DN 2533.434.242.942.96
DN 3242.142.943.83.83
DN 404848.844.384.42
DN 5059.860.
DN 6575.476.64.57.938.05
DN 8088.189.5510.310.5
DN 100113.3114.95.414.514.8
DN 125138.7140.65.417.918.4
DN 150164. 1166. 15.421.321.9
NOTE:Dimensions and masses are in accordance with ISO 65.

Chemical & Mechanical Requirements of AS/NZS 1074

Chemical composition and mechanical requirements are critical factor that determines the quality and performance of steel tubes. Our AS/NZS 1074 tubes are manufactured using steel grades that meet specific chemical requirements, and our tubes are designed to meet stringent mechanical requirements, including tensile strength, yield strength, and elongation. These tubes are engineered to withstand varying degrees of mechanical stress, making them ideal for a wide range of applications.

  • 2.1 PROCESS OF MANUFACTURE. Tubes may be either welded or seamless .
  • 2.2 MATERIAL. Tubes shall be manufactured from steel which shows,  not more than 0.045 percent  of  sulfur and not more than 0.045 percent of phosphorus. Carbon equivalent as calculated from the following equation shall not exceed 0.4:                               
  • Lengths or strips cut from selected tubes and tested in accordance with AS 1391 shall show–
  • (a)   minimum yield strength of 195 MPa;
  • (b)   a  tensile  strength  of  between  320  MPa  and 460 MPa; and
  • (c)   an  elongation  of not  less than 20 percent  on a gauge length of  5.65√So  where So  is the original cross-sectional area of  the test piece.
  • NOTE:Where other gauge lengths are used,the corresponding elongation on 5.65√So can be obtained from BS 3894:Part 1.

Production Tolerance of AS/NZS 1074

The following manufacturing tolerances shall be permitted on the tubes:
(a) Thickness:
Light welded tubes + unlimited, – 8 percent.
Medium and heavy tubes –
Welded…….+ unlimited, – 10 percent.
Seamless….. + unlimited, – 12.5 percent.
(b)Ouside diameler:
Light tubes……as given in Table 2.1
Medium tubes……as given in Table 2.2.
Heavy tubes……as given in Table 2.3.
The mean consignment mass for quantities of 150 m and over of one size shall not deviate from the standard mass by more than ±4 percent.No single tube shall deviate from the standard mass by more than + 10, – 8 percent.

Our Advantages

  1. Over 25 years of experience in pipeline production and installation.
  2. Comprehensive inspection equipment.
  3. Independent product serial numbers for traceability.
  4. Advanced production equipment – Seamer high-frequency welding machine from the United States.
  5. Complete qualifications – API 5L/API 5CT/FM/UL fire pipe certification, etc.
  6. Wide range of products – independently developed solar torque tubes, highly favored in the European market.
  7. Customers spread across the globe.
  8. Excellent after-sales service and sense of responsibility.

Application Scenarios

Our steel pipes are engineered to withstand high temperatures, corrosive environments, and varying pressures, ensuring reliability and safety in the complex petrochemical processes. 

Whether it’s transferring crude oil, natural gas, or chemical intermediates, the robustness and versatility of steel pipes make them indispensable components of the plant’s infrastructure, contributing to efficient production and maintenance of stringent safety standards.

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