Seamless Stainless Steel Pipe Supplier, Stainless Steel 304 Seamless Pipe, Stainless Seamless Tube

IDxO.D. rr.mØ	Apply Pressure (Kg/cm²)	Inquire	IDxO.D. rr.mØ	Apply Pressure (Kg/cm²)	Inquire	IDxO.D. rr.mØ	Apply Pressure (Kg/cm²)	Inquire
20x30	640		40x46	192		100x114	179
25x30	256		50x57	179		125x138	133
30x36	256		63x71	163
32x37	173		80x89	144
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Seamless stainless steel pipe suppliers offering precision ID

Seamless stainless steel pipe suppliers provide critical components widely used in hydraulic and pneumatic systems where precision and durability matter most. A seamless stainless steel pipe is a tubular product made without any welded seams, produced by piercing or extrusion of solid billets, which ensures a uniform and continuous structure throughout the pipe. This seamless design delivers superior strength, excellent pressure resistance, and consistent wall thickness—making it ideal for demanding industrial applications.

In hydraulic and pneumatic equipment, these seamless stainless steel pipes are prized for their exceptional internal diameter (ID) accuracy, often held to tight tolerances such as H7, H8, or H9. Combined with finely honed surface finishes ranging from Ra 0.2 μm to 0.8 μm, seamless stainless steel pipes reduce seal wear and friction, ensuring efficient and reliable actuator operation. Their corrosion resistance, particularly in grades like SUS316, protects against rust and chemical attack, making them suitable for harsh environments including offshore, chemical plants, and marine applications.

Compared to welded pipes, seamless stainless steel pipes avoid common weak points caused by weld seams, providing enhanced fatigue life under cyclic hydraulic pressure and higher pressure ratings. Their clean internal surfaces also reduce contamination risk, a crucial feature for medical, food-grade, and high-purity automation systems. Additionally, seamless stainless steel pipe offer excellent machinability and weldability for customized fittings and components.

For optimal performance in fluid power systems, seamless stainless steel pipes are frequently paired with stainless steel piston rods and stainless steel round bars to create corrosion-resistant, high-precision cylinders that withstand tough conditions and maintain long service life. When sourcing from reliable seamless stainless steel pipe suppliers, customers gain access to pipes made from high-quality stainless grades such as SUS304, SUS316, and SUS410 with precise dimensional controls, ensuring consistent quality and superior functionality.

Explore Stainless Steel 304 Seamless Pipe for Hydraulic Cylinder Applications

In hydraulic systems, the stainless steel 304 seamless pipe serves as the essential cylinder barrel where precise fluid power motion is generated. Also known as stainless seamless tube, this pipe provides a smooth, corrosion-resistant, and dimensionally accurate surface crucial for efficient hydraulic cylinder operation.

How Seamless Pipes Are Used in Hydraulic Cylinders
Within hydraulic cylinders, the stainless seamless tube forms the outer barrel housing a piston fitted with seals that slide back and forth under pressurized hydraulic oil. The internal diameter (ID) precision of these pipes is critical. If the tolerance is too loose, hydraulic fluid leaks past the seals, decreasing system force and efficiency. Conversely, if the ID is too tight, seals can experience accelerated wear or even seize during operation.

To ensure optimal sealing and longevity, these stainless seamless tubea typically maintain tight ID tolerances such as H7 for precision systems, H8 for general-purpose actuators, and H9 when some clearance is acceptable. The inner surfaces of these pipes are often honed to achieve smooth finishes around Ra 0.2 μm, reducing friction and seal wear during piston movement.

Why Pair with Stainless Steel Piston Rods?
A stainless steel 304 seamless pipe alone does not guarantee system longevity. It must be paired with a stainless steel piston rod to create a fully corrosion-resistant and mechanically compatible assembly.

Corrosion Resistance: Using stainless steel for both the cylinder barrel and piston rod prevents galvanic corrosion, a common issue when carbon steel rods are used with stainless barrels in humid or chemical environments. This pairing ensures no rust formation on rod surfaces and prevents hydraulic fluid contamination, significantly extending service life.

Thermal and Mechanical Compatibility: stainless seamless tube and stainless steel piston rods have closely matched coefficients of thermal expansion. This compatibility minimizes dimensional changes and stress on seals during temperature fluctuations, enhancing overall system reliability and fatigue resistance.

Cleanliness and Aesthetics: Industries such as food processing, pharmaceuticals, marine, and semiconductor manufacturing require equipment that meets stringent cleanliness and sanitation standards. A complete stainless seamless tube and piston rod assembly ensures easy cleaning, resistance to aggressive sterilization processes, and maintains hygienic integrity.

Common Applications of Stainless Seamless Pipes with Stainless Piston Rods
This combination is widely used in:
1. Marine hydraulic cylinders subject to corrosive saltwater environments
2. Pharmaceutical and food-grade pneumatic actuators requiring sanitary conditions
3. Semiconductor manufacturing and cleanroom automation equipment
4. Subsea and offshore hydraulic systems exposed to harsh chemical and moisture conditions
5. Chemical processing machinery where corrosion resistance is paramount

Material Grades Commonly Used in stainless seamless tube and stainless steel piston rods
Stainless Seamless Tube and Seamless Stainless Steel Pipe:
SUS304TK: Cost-effective with good corrosion resistance for general industrial use
SUS316: Enhanced corrosion resistance suitable for aggressive chemical and marine environments
SUS410: Martensitic grades offering higher strength and hardness for demanding applications

Why Choose Stainless Steel 304 Seamless Pipe with Stainless Piston Rod?
Using a stainless steel 304 seamless pipe in conjunction with a stainless steel piston rod delivers:
1. Outstanding dimensional precision and consistent internal finish for reliable sealing and piston movement
2. Superior corrosion resistance critical for long-term durability in harsh and corrosive environments
3. Compatibility with hygienic and high-purity system requirements ensuring easy cleaning and maintenance
4. A rust-proof, high-strength, and low-maintenance hydraulic cylinder assembly ideal for high-pressure operation

This combination is the trusted solution for industries demanding performance, safety, and longevity in hydraulic and pneumatic equipment. Whether for food processing, marine applications, or advanced industrial automation, choosing seamless stainless steel pipes paired with stainless steel piston rods ensures optimized efficiency, reduced downtime, and long-term cost savings.

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Tolerance Of Honed Tube

Grade of tolerance Dia mm Φ	H
	H7	H8	H9	H10
3mm	+0.010 0	+0.014 0	+0.025 0	+0.040 0
3mm-6mm	+0.012 0	+0.018 0	+0.030 0	+0.048 0
6mm-10mm	+0.015 0	+0.022 0	+0.036 0	+0.058 0
10mm-18mm	+0.018 0	+0.027 0	+0.043 0	+0.070 0
18mm-30mm	+0.021 0	+0.033 0	+0.052 0	+0.084 0
30mm-50mm	+0.025 0	+0.039 0	+0.062 0	+0.100 0
50mm-80mm	+0.030 0	+0.046 0	+0.074 0	+0.120 0
80mm-120mm	+0.035 0	+0.054 0	+0.087 0	+0.140 0
120mm-180mm	+0.040 0	+0.063 0	+0.100 0	+0.160 0
180mm-250mm	+0.046 0	+0.072 0	+0.115 0	+0.185 0
250mm-315mm	+0.052 0	+0.081 0	+0.130 0	+0.210 0
315mm-400mm	+0.057 0	+0.089 0	+0.140 0	+0.230 0
400mm-500mm	+0.063 0	+0.097 0	+0.155 0	+0.250 0

(unit)µ=0.001mm

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Chemical Composition

SUS 304TK-605	C	Si	Mn	P	S	Ni	Cr
	≤0.08	≤1.00	≤2.00	≤0.040	≤0.030	8.00/11.00	18.00/20.00

 

Mechanical Property

SUS 304TK-650	Tensile Strength (N/ mm²)	Yield Strength (N/ mm²)	Elongation % No.11 Test Piece No.12 Test Piece
	520	205	60

Golden Asia Industrial Company is a professional supplier produced sort of high quality Stainless Steel Seamless Pipes. If you are interested in our stainless steel seamless pipe, please contact us online.