316Ti 1.4571 Stainless Steel Hollow Structural Section SHS RHS CHS Tube Pipe

Titanium-Stabilized Stainless Steel × Laser Hybrid Welding + CMTSpecialized in 30 mm Thick-Wall Hollow Structural Sections for Extreme Engineering ApplicationsIn engineering environments characterized by high temperatures, severe corrosion, heavy loads, and long service cycles, structural tubular products require more than corrosion resistance. They must also deliver reliable weld performance, dimensional accuracy, structural load-bearing capacity, and long-term operational stability.
煌港特鋼有限公司 (Peak Kong Special Steel) specializes in the development and manufacture of 316Ti / 1.4571 titanium-stabilized austenitic stainless steel hollow structural sections (HSS). By combining our self-developed flexible tubular manufacturing line with Laser Hybrid Welding + CMT (Cold Metal Transfer) technology, we provide high-precision, traceable, and customizable thick-wall stainless steel tubular solutions for advanced industrial, energy, environmental, marine, and architectural engineering applications.
We focus particularly on the 30 mm thick-wall series, which can be challenging for conventional tubular manufacturing processes. Our flexible manufacturing capabilities support standard specifications, small-batch orders, and non-standard geometric cross-sections, helping engineering designers overcome the limitations associated with fixed tooling, high minimum order quantities, and standardized dimensions.
30 mm thick-wall manufacturing capability. Laser hybrid welding technology. Engineered to project requirements.
From material selection to final delivery, we provide verifiable structural performance for demanding service environments.

1. 316Ti / 1.4571: A Material Choice for High-Temperature and Corrosive Service316Ti / 1.4571 is a titanium-stabilized austenitic stainless steel within the 316 series. Titanium can preferentially combine with carbon to form relatively stable titanium carbides, helping reduce the material’s susceptibility to intergranular corrosion after welding or high-temperature exposure.
With appropriate material selection and engineering design, 316Ti can be used in selected high-temperature, humid, and corrosive environments, providing a reliable material foundation for load-bearing frames, equipment supports, tubular trusses, and industrial structures.
Key Material Characteristics

• Good corrosion and oxidation resistance
• Suitable for selected high-temperature industrial environments
• Good weldability and fabrication adaptability
• Helps control the risk of intergranular corrosion after welding
• Can reduce certain coating and corrosion-protection maintenance requirements associated with conventional carbon-steel structures
• Suitable for large hollow sections and load-bearing structures
• Stainless steel offers good recyclability, supporting circular-economy and ESG objectives

Actual material suitability should be evaluated according to chemical media, chloride concentration, operating temperature, loading conditions, welding condition, and required design life.

2. Laser Hybrid Welding + CMT: Engineered for Thick-Wall Structural TubesDuring the manufacture of thick-wall stainless steel hollow structural sections, manufacturers typically need to address challenges including insufficient penetration, welding distortion, heat-affected-zone control, and internal weld quality inspection.
Peak Kong Special Steel combines the concentrated energy density of laser welding with the controlled heat-input characteristics of CMT, supported by an automated tubular welding production line. This process combination is designed to improve welding stability and dimensional control for thick-wall structural tubes.
Subject to the completion of the relevant welding procedure qualification and project-specific technical approval, Peak Kong Special Steel can provide full-penetration welding solutions for 316Ti structural tubes with wall thicknesses up to approximately 30 mm.
Process Advantages

• Concentrated laser energy for improved control of penetration and heat input
• CMT technology helps reduce spatter and welding heat input
• Reduced welding distortion and subsequent straightening requirements
• Suitable for medium- and thick-wall hollow structural sections
• Supports continuous welding and automated production
• Helps improve weld-bead consistency
• Can accommodate UT, PT, RT and other specified inspection requirements
• Supports small-batch, multi-specification and non-standard orders

For titanium-stabilized stainless steels, welding thermal cycles, interpass temperature, filler-metal selection, and post-weld microstructural control must be implemented in accordance with approved welding procedures.
Actual penetration depth, weld performance, and inspection level shall be determined by the material grade, joint configuration, qualified welding procedure, and project specifications.

3. 30 mm Thick-Wall Hollow Structural Section RangePeak Kong Special Steel can manufacture square, rectangular, circular, and specially engineered hollow structural sections according to project requirements.
Square Hollow Sections (SHS)Reference range: 50 × 50 × 4 mm to 600 × 600 × 30 mm
Suitable for:

• Columns
• Trusses
• Equipment supports
• Large-span space structures

Rectangular Hollow Sections (RHS)Reference range: 60 × 40 × 4 mm to 800 × 400 × 30 mm
Suitable for:

• Beams
• Tubular trusses
• Asymmetric load-bearing members

Circular Hollow Sections (CHS)Reference range: Ø60 × 4 mm to Ø1200 × 30 mm
Suitable for:

• Large cylindrical structures

Non-Standard Custom ProfilesCustomized production is available based on customer drawings, 3D models, or engineering specifications, including:

• Polygonal hollow sections
• Special-shaped and asymmetric sections
• Tubes with special aspect ratios
• Variable-section tubes
• Locally reinforced or specially combined wall thicknesses
• Extra-long structural tubes
• Engineering-specific connection and node components

Subject to transportation, lifting, and manufacturing conditions, delivery solutions for tubes up to approximately 15 m in length can be evaluated.
Actual dimensions, lengths, tolerances, and manufacturability are subject to technical review and confirmation.

4. Overcoming the Limitations of Conventional Hot-Rolling and Standard Tube ManufacturingConventional profile and tubular manufacturing processes often rely on fixed tooling, which can limit flexibility when dealing with special stainless steel grades, small-batch production, and non-standard cross-sections.
When a project requires small quantities, multiple specifications, special wall thicknesses, or customized geometries, common challenges include:

• High tooling and die costs
• High minimum order quantities
• Long production lead times
• Standard dimensions that do not match the design
• Additional site assembly and secondary fabrication
• Reduced material utilization and engineering efficiency

Peak Kong Special Steel uses flexible automated manufacturing lines to overcome some of the limitations associated with fixed tooling, supporting:

• Small-batch specialty stainless steel tube production
• Mixed production of multiple specifications
• Customized cross-sections
• Non-standard wall thicknesses and lengths
• Drawing-based manufacturing
• Engineering nodes and associated component fabrication

From cross-section design and material selection to welding procedures and inspection requirements, we can assist customers in establishing an integrated manufacturing solution, helping reduce the gap between engineering design and production.

5. Typical Application FieldsPetrochemical, Fine Chemical and Pharmaceutical Industries

• Tubular trusses for high-temperature acidic-gas pipelines
• Supports for high-sulfide process piping
• External structures for refinery catalytic cracking units
• Heavy-duty reactor support frames
• Structural frames for highly corrosive equipment
• Process-piping corridors and equipment platforms

Power Generation, Thermal Energy and Energy Facilities

• Suspension supports for high-temperature, high-pressure steam pipelines
• Load-bearing structures around boilers
• Trusses for exhaust-gas filtration and flue-gas systems
• Heat-exchanger support structures
• High-temperature energy equipment platforms
• Tubular trusses for industrial thermal-energy systems

For nuclear-energy or other high-safety-classification projects, material, welding, inspection, quality-assurance, regulatory, and qualified-supplier requirements shall be separately confirmed according to the applicable project specifications and regulatory framework.
Environmental Infrastructure and High-Temperature Flue-Gas Treatment

• High-temperature load-bearing trusses for waste-incineration facilities
• Supports for industrial flue-gas desulfurization and denitrification systems
• External pipe racks for FGD scrubber towers
• High-temperature exhaust-gas treatment systems
• Structural components for hazardous-waste treatment equipment
• Components for high-temperature chemical wastewater reaction systems

Large-Span Buildings and Specialized Engineering

• Space trusses and large-span roof structures
• Exposed steel structures in industrial pollution environments
• Coastal and marine building structures
• Heat-resistant tubular trusses for aerospace launch facilities
• High-end AESS architectural components
• Public infrastructure requiring high aesthetic quality, durability, and low maintenance

6. International Standards and Quality TraceabilityPeak Kong Special Steel can coordinate applicable material, product, welding, and inspection standards according to project requirements, including:

• EN 10088 series — Stainless steel material standards
• EN 10219 — Relevant requirements for cold-formed welded structural hollow sections
• EN 10378 — Relevant requirements for stainless steel structural sections
• ASTM A554 — Relevant requirements for stainless steel tubing
• ASTM, JIS, BS, and other project-specified standards
• EN 10204 3.1 / 3.2 — Material inspection documentation
• EN 15614 series — Welding procedure qualification requirements
• AWS and project-specific welding specifications

Available Quality Documentation and Inspection

• Original material certificates
• Heat-number and material-batch records
• MTC in accordance with EN 10204 3.1 / 3.2
• Welding procedure documentation and qualification records
• Dimensional and visual inspection reports
• Weld visual inspection
• UT — Ultrasonic Testing
• PT — Penetrant Testing
• RT — Radiographic Testing
• Third-party inspection and witnessing services
• Finished-product identification and full-process traceability records

The actual applicable standards, certification scope, and inspection requirements shall be determined according to the project technical agreement, Inspection and Test Plan (ITP), and formal contractual documents.

7. From Engineering Drawings to Final DeliveryPeak Kong Special Steel provides an integrated, one-stop engineering manufacturing service:
1. Service Condition AnalysisEvaluate operating temperature, process media, corrosion conditions, loading, and required design life.
2. Material and Cross-Section SelectionAssess the suitability of 316Ti / 1.4571 and other candidate materials according to project requirements.
3. Drawing and Manufacturability ReviewConfirm dimensions, tolerances, wall thickness, welding joints, and inspection requirements.
4. Precision Cutting and FormingCarry out plate cutting, assembly, and geometric positioning according to approved drawings.
5. Laser Hybrid Welding + CMT ManufacturingPerform longitudinal or circumferential welding in accordance with approved welding procedures.
6. Dimensional Correction and Surface TreatmentControl straightness, roundness, distortion, and weld appearance.
7. Quality Inspection and DocumentationComplete material verification, dimensional inspection, weld inspection, and non-destructive testing.
8. Packaging and Engineering DeliveryComplete product identification and packaging according to transportation, lifting, and site-installation requirements.

Building More Reliable Hollow Structures for Extreme EngineeringFor engineering projects exposed to high temperatures, severe corrosion, heavy loads, and long operating cycles, the requirement is not simply a standard tubular product, but an integrated solution capable of matching the actual service environment, design loads, manufacturing requirements, inspection criteria, and delivery conditions.
煌港特鋼有限公司 | Peak Kong Special Steel uses 316Ti / 1.4571 titanium-stabilized stainless steel as a material foundation and Laser Hybrid Welding + CMT as a core manufacturing technology, specializing in the high-precision, flexible, and customized production of 30 mm thick-wall hollow structural sections.
Whether it is a standard SHS, RHS, or CHS, or a polygonal, variable-section, or project-specific non-standard profile, we are committed to transforming engineering requirements into manufacturable, inspectable, traceable, and deliverable high-performance structural products.
煌港特鋼有限公司 | Peak Kong Special Steel
30 mm Thick-Wall Stainless Steel Hollow Structural SectionsEngineered for High-Temperature and Extreme Corrosion Applications.