AS/NZS 1163 C350 Pipe

AS/NZS 1163 C350 Pipe – High-Strength Structural Hollow Section for Industrial and Infrastructure Applications

AS/NZS 1163 C350 Pipe is a cold-formed structural steel hollow section manufactured to meet the rigorous requirements of Australian and New Zealand construction standards. Hebei Longma Group Limited is a manufacturer with over 20 years of experience and an annual production capacity of over 1,000,000 tons. This high strength structural pipe is available in full range sizes from 60.3mm to 2032mm (2"-80") OD and 4mm to 100mm wall thickness. Our C350 pipes have a minimum yield strength of 350 MPa and a tensile strength of 430 MPa, providing superior load-bearing capability with good weldability for demanding structural applications in more than 90 countries worldwide.

Understanding AS/NZS 1163 C350 Structural Pipe

The product is a cold formed welded structural hollow section for use in situations requiring greater strength than ordinary grades. The “C350” means the minimum yield strength is 350 MPa, which will provide a far better structural performance than C250 alternatives.

This standard covers important technical problems in contemporary building. In the construction of steel framed buildings, bridges or industrial facilities, the problem of weight reduction without sacrificing safety becomes critical. This is achieved by C350 grade because to its excellent strength to weight ratio.

The regulated chemical composition, often with maximum 0.20% Carbon and about 1.60% Manganese, guaranties good field weldability without pre-heating on most conventional thicknesses. This feature will save a lot of your building phase manufacturing time and expense.

Technical Specifications and Performance Parameters of AS/NZS 1163 C350 Pipe

Our manufacturing facility produces AS/NZS 1163 C350 structural pipes with precise dimensional control and consistent mechanical properties:

The L0 variant (C350L0) offers guaranteed Charpy V-notch impact energy absorption at 0°C, making it particularly suitable for structures subjected to dynamic loading or operating in low-temperature environments.

Key Performance Advantages

Superior Structural Strength

The yield strength of the C350 grade is 40% greater than that of C250, which means that you may build more efficient structures and use less material. This means cheaper shipping costs and simpler installation for your projects.

Improved Cost-effectiveness

C350 maintains competitive cost while giving high strength attributes. Lightweight sections may typically be used without structural integrity being compromised, which can provide total project savings of between 15% and 25% over heavier equivalents.

Good Fabrication Properties

The chemical composition is adjusted for smooth welding, cutting and forming. You won’t need to deal with pre-heating needs of higher carbon steels, cutting down on your manufacturing time and energy use.

Dimensional Accuracy and Uniformity

Our innovative cold forming technique maintains close tolerances on exterior diameter, wall thickness, straightness and out-of-roundness. This accuracy helps to guarantee good fit-up in assembly and saves the waste produced by rework.

Testing and Quality Assurance Procedures

Hebei Longma Group undertakes quality control across the whole process of production. Each batch of manufacturing is subjected to stringent testing to ensure compliance with AS/NZS 1163 criteria.

Our quality control system incorporates 100% Eddy Current or Ultrasonic testing for detection of any internal discontinuities on longitudinal weld seams. Dimensional verification is performed according to the standards of Table 7 of the standard, verifying out-of-roundness and mass per unit length.

L0 grade products: Charpy V-notch impact tests to ensure the energy absorption capabilities at specified temperatures. Inspection of surface finish provides assurance that no detrimental flaw exists that would impair structural integrity or later coating processes.

We have full traceability from the selection of raw material to the delivery of the finished product. We get our steel from top Chinese mills such as Shagang, Shangang, TISCO, BX Steel, Shougang, HBIS and Bao Steel.

Different Application Scenarios

AS/NZS 1163 C350 Pipe is suitable for a range of structural applications where strength, dependability and compliance are important:

Building Construction: Reduced weight and improved strength provide advantages for main frames of commercial buildings, retail centres, warehouses and multi-storey constructions.

Infrastructure Projects C350 is used for bridge components, pedestrian overpasses, railway platforms and highway constructions because of its durability and load bearing capabilities.

Industrial Facilities Mining support structures, processing plant frameworks, conveyor supports and equipment mounting systems need the rugged performance of C350.

Mechanical Support Systems: Crane booms, lifting equipment, material handling structures and specialised machinery frames all need constant mechanical qualities.

The range of sizes from 60.3mm to 2032mm diameter and wall thicknesses up to 100mm means you may choose the section you need for your structural calculations.

Value-Added Services and Customization Options

Beyond standard pipe production, Hebei Longma Group offers comprehensive fabrication and surface protection services tailored to your project requirements.

We can precisely cut to length, end prepare for welding connections, drill holes for bolted assemblies and custom mark as per your needs. These services decrease your on-site fabrication work and speed up building timetables.

Surface protection solutions include of hot dip galvanising to defend against corrosion, FBE coating for subterranean use and 2PP, 3LPE or 3PE coating systems to provide additional environmental protection. Proper surface treatment greatly improves service life in harsh conditions.

Documentation Support for International Projects

Understanding the documentation requirements for international engineering projects, we provide complete technical files for every shipment. Your procurement team receives Mill Test Certificates (MTC) with actual chemical analysis and mechanical test results traceable to specific heat numbers.

Additional paperwork includes dimensional inspection reports, weld quality records, visual inspection certifications and compliance declarations to AS/NZS 1163. We work with organisations like BV, TUV or Intertek for projects that need third party certification.

Before production, examine our manufacturing process specifications (MPS) and inspection and test plans (ITP) to ensure they meet your project quality standards.

FAQ

Q：What distinguishes C350 from C250 grade structural pipes?

A：C350 provides minimum yield strength of 350 MPa compared to 250 MPa for C250 grade. This 40% strength increase allows you to use lighter sections for equivalent load-bearing capacity, reducing material costs and simplifying handling. The controlled chemistry maintains good weldability despite the higher strength level.

Q：Is pre-heating required when welding products?

A：For most standard wall thicknesses, pre-heating is not required when using appropriate welding procedures. The low Carbon Equivalent value—typically maintained through Carbon content below 0.20%—ensures good weldability without pre-heat in ambient temperatures above 5°C. Thicker sections or cold weather conditions may require consultation with our technical team.

Q：How does the L0 designation affect material selection?

A: The C350L0 grade guaranties a minimal Charpy V-notch impact energy at 0°C, ensuring safety for structures subject to dynamic loads or operating at low temperatures. Specifying L0 grade gives you a crucial safety buffer if your project includes cyclic loads, seismic factors or service temperatures below 10°C.

Q: What are the normal delivery timelines that purchasers might expect?

A: We retain inventories of typical sizes at our 230,000 square metre production plant, with delivery as short as 7 days for standard standards. For custom sizes, usually 15-25 days depending on quantity and special needs. We have yearly manufacturing capacities of more than 1,000,000 tons for large project quantities.

Q:What certifications of quality prove conformity to AS/NZS 1163?

A: All shipments are accompanied by Mill Test Certificates (EN 10204 Type 3.1 or 3.2) verifying the chemical composition, mechanical qualities and dimensional verification. To demonstrate the adoption of comprehensive quality system, our facility is certified to API 5L, ISO 9001 Quality Management System, ISO 14001 Environmental Management and ISO 18001 Occupational Health and Safety.

Q：Can pipes be supplied with custom lengths and end preparations?

A：Absolutely. We provide cutting to your specified lengths with tolerances according to AS/NZS 1163 requirements. End preparation options include square cutting, beveling for butt welding, threading, and grooving. Custom marking with your project identifiers, heat numbers, or specification details can be applied according to your requirements.

Contact Us

Contact our team at info@longma-group.com to discuss your AS/NZS 1163 C350 Pipe project specifications and receive professional technical guidance for your next construction or infrastructure initiative.