Specifications

1.Grade:10#,20#.35#,45#,Q345,16Mn,25Mn,27SiMn,42CrMo,ck45,St45,St52etc
2.ID:30-250mm
3.BKS honed steel pipe

Commodity name: Precision honed european standard carbon steel pipe

Technical parameter:

 

1.Raw material:10#,20#,35#,45#,Q345,16Mn,25Mn,27SiMn,42CrMo,Aisi1020,Aisi1045,st35,St45,St52etc

 

2.ID:30-250mm

3.ID tolerance:H8,H9

4.Surface roughness:Ra 0.02— 0.4μm

 

5. Final supply condition:cold drawn and stress-relieved(BK+S)

6. Machining allowance:0.5-1.5mm

 

7.Wall thickness:10%×ID

 

Dimensions tolerance

 

OD(mm)	ID (mm)	Tolerance
		OD (mm)	ID (mm)	Wall thickness deviation (mm)	Ovality (mm)	Curvature(mm/m)
40-74	30-65	±.01	-0.3,-0.5	≤0.5	≤0.1	0.3
74-98	65-85	±.01	-0.4,-0.6	≤0.5	≤0.15	0.3
100-116	85-100	±.02	-0.4,-0.6	≤0.6	≤0.15	0.3
124-134	110-115	±.02	-0.6,-0.8	≤0.6	≤0.20	0.3
140-158	120-135	±.02	-0.7,-0.9	≤0.8	≤0.20	0.3
165-176	140-150	±.02	-0.7,-0.9	≤0.8	≤0.20	0.3
188-203	160-180	±.02	-0.7,-0.9 Honed	≤0.8	≤0.20	0.3

 

Tolerance on ID

 

No.	Inside diameter(mm)	ID machining allowance(mm)
1	50-80	0.5-0.8
2	81-125	0.7-1.1
3	125-200	0.9-1.2
4	200-250	1-1.5
Other dimension can be customized

 

Commercial length

 

No.	ID Min.(mm)	Length(mm)
1	50	700—2000
2	63	700—3000
3	80	700—4000
4	>90	700—6000
Other dimension can be customized

 

Delivey conditions:

• Standard packing with plastic caps and strapped bundles.
• Commercial length 2000~10500mm,custom lengths upon request
• Surface protection

we can supply all kinds of seamless steel pipes such as hot rolled seamless steel pipe,cold drawn seamless steel pipe,honed tubes,cold drawn welded tubes(DOM tubes).

 

Management System Certification:

 

 

 

Production Process:

• Pretreatment :  Acid cleaning- Parkerizing

 

• Cold drawn/cold rolled

• Annealing furnace—— stress-relieving (+SR)

• Straightener—— Straightening/ Leveling

Dimension inspecting  

• Sawing off not good parts

 

• Lathe

• Surface Polishing

•  Finished honed tube