ALLLAND Boiler Steel Pipe Supply
Welcome to ALLLAND Steel Pipe Manufacturing. AS/NZS 1579 is a widely adopted standard for hydraulic steel pipes in Australia and New Zealand. ALLLAND supplies arc-welded steel pipes that comply with this standard to customers worldwide, making them suitable for water supply and wastewater conveyance systems. With our proven LSAW and SSAW production technologies and intelligent production lines, we help ensure the efficient progress of your engineering projects.
Alllandsteel is a steel pipe manufacturer based in China with 25 years of experience.
The facility spans 22,000 square meters, represents a RMB 700 million investment, and operates four production lines (JCOE, ERW, SMLS, SSAW) alongside five coating lines.
With an annual production capacity of 250,000 tons, the factory covers specifications ranging from Ø406 to Ø1524 and holds multiple international certifications (API/ASTM/EN/ISO/JIS). Focused on steel pipes, creating value for you!
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AS/NZS 1579 (current edition: AS 1579:2001) is a standard jointly published by Australia and New Zealand for steel pipes and fittings manufactured using arc welding processes. It is primarily intended for use in water supply and wastewater treatment systems, or for piling applications. Full title of the standard: Arc-welded steel pipes and fittings for water and wastewater.
O.D.:
DN100-DN2000
114.3mm-2020mm+
Product Type:
LSAW/SSAW pipe
Butt-welded fittings
W.T.:
4 mm – 50 mm+
Length:
6 m / 9 m / 12 m/Random length
End Type:
Plain end/Beveled end/Socket & spigot/Rubber ring joint
Maximum Rated Pressure:
6.8 MPa（≈ 68 bar）
This standard does not apply to small-diameter pipes (< DN100); it primarily covers large-diameter pipes ranging from DN100 to DN3000+, and is suitable for water and wastewater conveyance projects with high performance requirements.
The outer diameter (OD) can be customized according to project requirements, provided that the nominal diameter (DN) is ≥ 100 mm.
| DN (mm) | OD (mm) | WT (mm) | Theoretical weight range (kg/m) |
| 100 | 114.3 | 4 – 8 | 10 – 22 |
| 150 | 168.3 | 5 – 10 | 20 – 45 |
| 200 | 219.1 | 6 – 12 | 32 – 75 |
| 250 | 273.0 | 6 – 14 | 40 – 95 |
| 300 | 323.9 | 6 – 16 | 50 – 130 |
| 350 | 355.6 | 8 – 16 | 70 – 150 |
| 400 | 406.4 | 8 – 18 | 85 – 180 |
| 450 | 457.0 | 8 – 20 | 95 – 210 |
| 500 | 508.0 | 8 – 22 | 110 – 250 |
| 600 | 610.0 | 10 – 25 | 150 – 350 |
| 700 | 711.0 | 10 – 28 | 180 – 420 |
| 800 | 813.0 | 12 – 30 | 220 – 500 |
| 900 | 914.0 | 12 – 32 | 260 – 580 |
| 1000 | 1016.0 | 12 – 35 | 300 – 700 |
| 1200 | 1219.0 | 14 – 40 | 400 – 900 |
| 1400 | 1420.0 | 16 – 45 | 550 – 1200 |
| 1600 | 1620.0 | 18 – 50 | 700 – 1500 |
| 1800 | 1820.0 | 20 – 50 | 900 – 1800 |
| 2000 | 2020.0 | 20 – 50+ | 1100 – 2200 |
| Project | Tolerance Requirements |
| OD | ±1% |
| WT | −10% (no positive or negative bias) |
| Ovality | ≤ 1% |
| Straightness | ≤ 0.2% L |
| Length | ±100 mm (common) |
| End Squareness / Bevel | Small-Deviation Control |
AS/NZS 1579 does not directly specify the chemical composition; instead, it refers to the base material standard (plate/coil standard) to control the chemical composition and mechanical properties.
Common material standards under AS/NZS 1579 include:：
Steel Plate
AS/NZS 3678
Steel Coil
AS/NZS 1594
Equivalent Standards
ASTM A36 / A572、EN 10025（S275 / S355）
Typical Composition Range (%)
| Element | Content（Typical） |
| C | ≤ 0.22 |
| Mn | ≤ 1.60 |
| Si | ≤ 0.50 |
| P | ≤ 0.040 |
| S | ≤ 0.040 |
Carbon equivalent is a key factor in the weldability of steel and is typically controlled at CE ≤ 0.45.
Calculation formula: CE = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15
Common steel grades according to AS/NZS 3678.
| Grade | Yield Strength | Tensile Strength |
| Grade 250 | ≥ 250 MPa | 410–540 MPa |
| Grade 300 | ≥ 300 MPa | 440–580 MPa |
| Grade 350 | ≥ 350 MPa | 480–620 MPa |
The elongation is typically ≥ 20%, ensuring the steel’s ductility and crack resistance.
Weld properties are one of the key control points in AS/NZS 1579, which requires that the weld strength be greater than or equal to the base metal strength.
The AS/NZS 1579 standard mandates the use of arc welding, such as LSAW or SSAW. This welding process offers deep penetration and stable welds, making it suitable for thick-walled steel pipes.
AS/NZS 1579 imposes very strict quality control requirements for welds; tensile testing, bend testing, and non-destructive testing are all mandatory test items.
The weld’s leak-tightness must also be verified; typically, a hydrostatic test is performed on the entire pipe.
Water-focused standard
AS/NZS 1579 is not a general-purpose pipe standard; rather, it specifies steel pipes and related fittings manufactured using the arc welding process for use in infrastructure projects such as urban water supply networks, sewage discharge systems, and internal conveyance pipelines in water treatment plants.
Engineering Flexibility
High flexibility in dimensions and design in accordance with the AS/NZS 1579 standard; available in sizes from DN100 to DN3000+; outer diameter (OD) can be customized.
High structural integrity
This standard imposes very strict requirements on welds, stipulating that their strength must be greater than or equal to that of the base material. Additionally, non-destructive testing (UT/RT) and hydrostatic testing must be performed to ensure reliability.
Cost and Manufacturing Advantages
Ideal for large-diameter projects, the use of arc welding significantly improves production efficiency, maximizes raw material utilization, and keeps production costs under control.
Highly Compatible Corrosion Protection System
The AS/NZS 1579 corrosion protection system is well-established and can be used in conjunction with common protective coatings such as 3LPE, FBE, and cement mortar linings, greatly extending the service life of the pipeline.
1. Core Applications: Municipal Water Supply
Urban water transmission, water transmission pipelines.
2. Wastewater & Sewerage
Sewer collection systems, stormwater drainage.
3. Seawater & Desalination
These types of applications are very common in Australia, such as intake pipelines and desalination plant pipelines.
4. Piling / Structural Use
Pipe piles, marine structures, bridge foundations.
| Project | AS/NZS 1579 | EN 10217 |
| Application | Water/Wastewater | Pressure Equipment |
| Welding | Arc-Welded | Various Welding Methods |
| Corrosion Protection | Emphasis on the lining. | Not involved. |
| Nominal Diameter | ≥ DN100 | Wider Scope |
| Project | AS/NZS 1579 | API 5L |
| Application | Water/Wastewater | Oil and Gas |
| Pressure | ≤6.8 MPa | Higher |
| Coating | Usually lined. | Primarily external corrosion protection. |
