Description

Precision steel pipe is a high-precision, high-brightness seamless steel pipe produced by cold drawing or cold rolling. Its inner and outer diameters can be accurate to within 0.2mm. While ensuring bending and torsional strength, it is light in weight, so it is widely used in the manufacture of precision mechanical parts and engineering structures. It is also commonly used to produce various conventional weapons, barrels, shells, bearings, etc.

Commonly used materials are ST52, Q345B, CK20, CK45, SAE1026 10#、20#、35#、45#、20cr、40Cr、20CrMo﹑16mn﹑27simn﹑304﹑201﹑310s, high-quality carbon structural steel.

Characteristics of precision steel pipes:

1. Smaller outer diameter.
2. High precision can be used for small batch production.
3. The cold drawn finished product has high precision and good surface quality.
4. The cross-sectional area of the steel pipe is more complex.
5. The performance of the steel pipe is superior, and the metal is relatively dense.

Applications of Precision Steel Pipe:

Precision steel pipes are widely used in fields with stringent requirements for dimensional stability and sealing due to their high precision (outer diameter/wall thickness tolerance can reach ±0.02–0.05mm), high surface finish (Ra≤0.4μm), high pressure resistance, oxide-free structure, and resistance to deformation after cold bending.

1. Hydraulic and Pneumatic Systems: Precision steel pipes are used to manufacture hydraulic cylinders, air cylinders, hydraulic supports, and high-pressure pipelines (such as in construction machinery, injection molding machines, and die-casting equipment), ensuring leak-free operation and impact resistance.

2. Automotive and Rail Transportation: Precision steel pipes are used in engine fuel/intake/exhaust pipelines, transmission components, chassis suspension, braking systems, and battery cooling pipelines in new energy vehicles.

3. Mechanical Manufacturing and Bearings: Precision steel pipes are used in high-precision bushings, jack cylinders, bearing raceways, and machine tool guide mandrels, reducing machining allowances and improving assembly efficiency and lifespan.

4. Aerospace and Military: Precision steel pipes are used in aircraft landing gear hydraulic components, missile guides, and engine fuel injection systems, requiring compliance with extreme environmental and lightweight requirements (some are made of stainless steel or alloy steel).

5. Semiconductor and Medical Devices: Cleanroom gas/liquid delivery pipes (316L precision stainless steel pipes), endoscope components, and anastomosis device components, requiring high cleanliness, corrosion resistance, and no shedding.

6. Energy and Petrochemicals: Boiler superheater tubes, heat exchanger tube bundles, and chemical reactor piping (pressure-resistant and corrosion-resistant, such as 16Mn and alloy steel), and some are used in nuclear power plant cooling circuits.

7. Other high-end fields: Precision steel pipes are used in precision instrument frames, robot joint axes, offshore platform piping, and wind turbine pitch bearing housings (commonly cold-drawn seamless or welded bright tubes).

Material	API SPEC 5L	A25, A25A, B, X42, X46, X52, X56, X60, X65, X70, X80, X90, X100
	ASTM A53/ASME SA53	Grade A, Grade B,
	ASTM A106/ASME SA106	Grade A, Grade B, Grade C
	ASTM A210/ASME SA210	Grade A-1, Grade C
	ASTM A500/ASME SA500	Grade A, Grade B, Grade C, Grade D
	ASTM A501/ASME SA501	Grade A, Grade B
	ASTM A556/ASME SA556	Grade A2, B2, C2
	BS 3059	320, 360, 440, 620-460, 629-590, 762
	EN 10216-1&2	P195, P235, P265
	EN10297-2	E235, E275, E315, E355a, E470, C22E, C35E, C45E
	EN10210-1	S235JRH, S275J0H, S275J2H, S355J0H, S355J2H, S355K2H
	DIN 1629	st37.0, st44.0, st52.0
	DIN 1630	st37.4, st44.4, st52.4
	DIN 2391	st35, st45, st52
	DIN 17175	st35.8, st45.8
	JIS G3429	STH11, STH 12
	JIS G3444	STK290, STK400, STK500, STK490, STK540
	JIS G3454	STPG370, STPG410
	JIS G3455	STS370, STS410, STS480
	JIS G3456	STPT370, STPT410, STPT480
	JIS G3460	STPL380
	JIS G3461	STB340, STB410, STB510
	JIS G3464	STBL380
	JIS G3475	STKN400W, STKN400B, STKN490B
Size	O.D:6-2500mm W.T:0.9-120mm Length: 5.8m, 6m, 11.8m, 12m, or as required.
Technique	1) Hot Rolled	Package	1) Export standard package
	2) Cold Drawn		2) bundled wooden box
	3) Cold Rolled		3) suit for all kinds of transport, or be require

Standards and Classifications

Material	10#, 20#, 45#, A53(A,B), A106(B,C), A179-C, ANSI4130 , 15Mo3, Q345, Q195, ST52, ST45, St37-2, ST35.4, ST35.8, ST54, 15crmo, 12Cr1MoV, API L80, 4130, 4140, 4135
Surface	Black/bright
Standard	ASTM A106-2006, ASTM A53-2007, ANSI A210-1996, ASTM A179-1990, BS 1139, BS 6323, DIN 1626, DIN 1629/4, DIN 2391, DIN 17175, DIN2448 ,GB/T8162, Gb/t8163, JIS G3459-2004, JIS G3456-2004, JIS G3101
Size	OD 3mm-140mm Thickness 0.5-20mm
Processing	Cold rolled /cold drawn 1. BK (+C) No heat treatment after last cold forming process. 2. BKW (+LC) After last heat treatment there is a light pass (colddrawing) 3. BKS (+SR) After the final cold forming process the tubes are stress relieve annealed. 4. GBK (+A) After the final cold forming process the tubes are annealed in a controlled atmosphere. 5. NBK (+N) After the final cold forming process the tubes are annealed above the upper transformation point in a controlled atmosphere.
Packing	Woven bag / wooden or crate carton/ Bundle Packing/ Plain end or vanished as per customer’s request.
Delivery time	Normally 15-25 working days