Stainless Steel Pipe

Stainless steel is an iron alloy that contains a minimum of 10.5% chromium. Alloying elements such as nickel, molybdenum, titanium, carbon, nitrogen, and copper can boost the strength, formability, and other properties of stainless steel. Different alloys offer different levels of corrosion resistance.
Stainless steel alloys offer greater cryogenic toughness, a higher work hardening rate, increased strength and hardness, greater ductility, and a more attractive appearance compared to carbon steel.
 

Product Name	Executive Standard	Dimension	Steel Code / Steel Grade
Seamless Austenitic Stainless Steel Pipes	ASTM A312/A312M, ASME SA312/SA312M	OD: 1/4"~20"	TP304, TP304L, TP304H, TP310, TP310S, TP316, TP316L, TP316Ti, TP317, TP317L, TP321, TP321H, TP347, TP347H
		WT: SCH5S~SCH80S
Seamless Austenitic Stainless Steel Tubing for General Service	ASTM A269, ASME SA269	OD: 6.0~50.8mm	TP304, TP304L, TP304H, TP310, TP310S, TP316, TP316L, TP316Ti, TP317, TP317L, TP321, TP321H, TP347, TP347H
Seamless Austenitic Alloy-Steel Boiler, Super Heater and Heat-Exchanger Tubes	ASTM A213/A213M, ASME SA213/SA213M	OD: 6.0~50.8mm	TP304, TP304L, TP304H, TP310, TP310S, TP316, TP316L, TP316Ti, TP317, TP317L, TP321, TP321H, TP347, TP347H
		WT: 0.8~10.0mm
Seamless Duplex Stainless Steel Tubing for General Service	ASTM A789 / A789M	OD: 19.0~60.5mm	S31803, S32205, S32750
		WT: 1.2~5.0mm
Seamless Duplex Stainless Steel Pipes	ASTM A790 / A790M	OD: 3/4"~10"	S31803, S32205, S32750
		WT: SCH5S~SCH80S
Seamless Stainless Steel Mechanical Tubing	ASTM A511	OD: 6.0~50.8mm	MT304, MT304L, MT304H, MT310, MT310S, MT316, MT316L, MT317, MT317L, MT321, MT321H, MT347
		WT: 1.8~10.0mm
Seamless Stainless Steel Tubes for Pressure Purposes	EN 10216, DIN 17456, 17458	OD: 6.0~530.0mm	1.4301, 1.4307, 1.4541, 1.4401, 1.4404, 1.4571, 1.4878, 1.4432, 1.4462
		WT: 0.8~34.0mm

Application of stainless seamless steel pipe                                                                                                                                                          

Chemical plants  
Aviation fields
Marine equipment
Cryogenic transportation
Medical & architectural industries
High-Pressure Fuel Lines
Hydraulic Control Applications


Benefits of stainless seamless steel pipe                                                                                                                                                               
Stainless steel pipe is resistant to rust and other corrosive attack. It is heat-resistant for high-performance and high-temperature use.

Manufacturing process of stainless seamless steel pipe                                                                                                                                          
Typical methods for manufacturing seamless stainless steel tubing are by extruding, gun drilling or piercing.  However, the extrusion process provides the most uniform OD (outside diameter) and ultimately the most concentric ID (inside diameter).  In addition, extrusion is the only process most suitable for long length seamless stainless steel coil tubing.


Tests of stainless seamless steel pipe                                                                                                                                                                  
stainless seamless steel pipe should be manufactured to applicable standards and fully tested for potential defects before being prepared for shipment to the customer.


            Outside Diameter Control                                              

X-Ray Testing Online

Hydrostatic Testing

Hydrotest
After the tube is fully formed to the desired specification it is hydrostatically tested to ensure integrity.  Hydrostatic testing determines and verifies the tubing meets the specification.  Several types of information can be obtained through this verification process.  Key inspection data can be identified through the hydrotest process, such as:

Material flaws  
Mechanical properties
Specific hard spots that can fail when hydrogen is present
Finishing
Stainless steel coil tubing can be level wound on spools for shipment or straightened
and cut to specific lengths designated by the customer.  
Products can be polished and stenciled with pertinent information for lot traceability and manufacturing identification.