Stainless Steel Pipes for Food Hygiene Applications

Product Advantages of Stainless Steel Pipes:

1. Seamless Weld Processing: The weld seams can be treated to eliminate shadows, ensuring a smooth finish.

2. High-Precision Mechanical Polishing: Achieved through a fully automated process, the internal Ra value can reach below 0.2μm, providing a flawless surface that meets various internal requirements.

3. Full Nitrogen Protection Welding: Using pure hydrogen for annealing protects the welded pipes, resulting in high strength at the weld seams. Tests show tensile strength exceeding 690 MPa, with an expansion rate of over 30%.

4. Excellent Machinability: The pipes have been tested for ballooning, necking, edge rolling, bending, and flattening without weld seam rupture.

Corrosion Resistance: After 1000 hours of salt spray testing, the surface shows no signs of corrosion.

Materials Available:

304 / 304L / 316 / 316L

Applications:

Dairy and food industries, pharmaceutical industry, and any sector requiring special internal surface specifications.

Process Features:

Internal weld seam leveling, solid solution treatment, and mechanical polishing of the inner surface.

Testing Methods:

Lateral and longitudinal flattening, reverse flattening, hydrostatic testing or eddy current inspection, mechanical property testing, and inner surface roughness testing.

This comprehensive approach ensures that our stainless steel pipes meet the highest standards for hygiene and performance in food and pharmaceutical applications.

STD	O.D		THK	LENGTH
ASTM A270	≦38.1mm±0.13mm		OD<12.7mm ±15%	OD<38.1mm +3.2mm
	≧38.1<88.9mm±0.25mm		OD<12.7mm ±10%	-0mm
ASTM A269	≧88.9<139.8mm±0.38mm			OD≧38.1mm +4.8mm
	≧139.8mm±0.76mm			-0mm
JIS G3447	≦25.4mm ±0.15mm		±10%	-0mm +10mm
	>25.4≦31.8mm ±0.16mm
	>31.8≦38.1mm ±0.19mm
	>38.1≦76.2mm ±0.25mm
	>76.2≦89.1mm +0.30mm
	>89.1≦101.6mm	-0.40mm
		+0.35mm
		-0.40mm
	>101.6≦114.3mm	+0.40mm
	>114.3≦139.8mm	-0.60mm
		+0.40mm
		-0.80mm
	>139.8≦165.2mm	+0.40mm
		-1.20mm