The customer is based in Istanbul, Turkey, operating in the food processing equipment manufacturing and engineering installation sector. The requirement was for 304 stainless steel pipes used in food-grade conveying systems and structural support frameworks.

Key concerns during the sourcing stage included:

• Compliance with food-grade application requirements
• Dimensional consistency of pipe outer diameter and wall thickness
• Welding and forming stability during on-site installation
• Long-term corrosion resistance in humid and cleaning-agent environments

• Material: 304 stainless steel (06Cr19Ni10)
• Size range: DN15–DN100
• Wall thickness: 1.5mm–3.0mm
• Surface finish: Industrial pickling / polishing
• Standards: ASTM A312 / EN 10216-5
• Application: Food processing pipelines and equipment support structures

The key requirement was stable performance in food processing environments, including:

• Frequent water exposure and humidity
• Contact with mild acidic/alkaline cleaning agents

Material basis:

• Cr content: ~18%–20%
• Ni content: ~8%–10.5%
• Formation of a stable Cr₂O₃ passive layer for corrosion protection

The pipes were used in automated equipment assembly, requiring strict consistency.

Key production controls:

• Cold drawing process for precise outer diameter control
• Strict wall thickness uniformity control
• Online inspection to ensure defect-free surface and structure

Since the pipes required secondary welding and on-site installation, the focus was on:

• Stable weld seam performance
• Heat-affected zone stability
• Reduced risk of intergranular corrosion after welding

Process control measures:

• Controlled low-carbon behavior (stability in composition control)
• Solution annealing to maintain a stable austenitic structure

 

Main production stages:

• Selection of hot-rolled base material
• Cold drawing for dimensional precision
• Solution annealing for structural stability
• Pickling/polishing surface treatment
• Full inspection before shipment

Before shipment, the following tests were performed:

• Outer diameter and wall thickness measurement
• Surface defect inspection (scratches, oxidation marks)
• Eddy current testing (non-destructive inspection)
• Hydrostatic pressure testing (as per standard requirements)
• PMI material verification (spectrographic analysis)

 

Delivery method:

• FOB sea freight shipment
• Reinforced wooden crate packaging to prevent deformation
• Batch traceability labeling for each bundle

• Successful installation in food processing pipeline system
• High dimensional consistency met automated assembly requirements
• No significant corrosion issues observed during welding and operation
• Follow-up repeat order placed for structural support applications

The success of this project was driven by:

• Correct material selection for food-grade environments (304 stainless steel)
• Cold forming process ensuring dimensional consistency
• Solution annealing improving weldability and corrosion stability
• Export-grade inspection ensuring batch reliability

If you require 304 stainless steel pipes, customized pipe dimensions, or stainless steel products for engineering applications, we can provide material selection guidance based on your working conditions (food processing, chemical equipment, construction, etc.), along with technical specification matching and export-level quotation support.

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