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Ningbo Huijie Steel Pipe Manufacturing Co.,Ltd [Zhejiang,China] Business Type:Manufacturer Main Markets: Africa , Americas , Asia , Caribbean , East Europe , Europe , Middle East , North Europe , Oceania , Other Markets , West Europe , Worldwide Exporter:11% - 20% Certs:ISO/TS16949, ISO14001, ISO9001 Description:4130 Drill Pipes 30CrMnSiA Drill Pipes Drill Outer Tubes Drill Inner Pipes
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4130+SR wire line seamless drill tubes,NQ HQ drill pipes,outer pipes,drill inner pipes

4130+SR wire line seamless drill tubes,NQ HQ drill pipes,outer pipes,drill inner pipes
4130+SR wire line seamless drill tubes,NQ HQ drill pipes,outer pipes,drill inner pipes
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Product Description

4130+SR Wire-Line Diamond Core Drill rods,Drill inner pipes,drill outer pipes

Huijie Specially in manufacturing cold drawn precision Seamless wire line Drill Pipes for Geological

Exploration Seamless Drill Pipes BQ/NQ/HQ/PQ,and the inner pipes and outer casing tubes.We have the steel grade

HJ600,HJ750,HJ850,HJ950,4130+SR,30CrMnSIA-T

The detail Seamless Steel Pipes of materials:SAE4130,45MnMoB,30CrMnSiA,SAE4140

SPECIFICATIONS: A519 Seamless Mechanical Tubing for drill rods.


1).BQ,NQ,HQ DRILL PIPES DIMENSION AND TOLERANCES (IN MM)

 

nameouter diameter, mminner diameter, mmwall of the pipe, mmLength, mmscope of application
Pipe 57х6

57,15+0,20

57,15+0,25

46,04-0,20

46,04-0,25

5,555*3550

Production of outer pipe В

 

Pipe 73х6

73,03+0,25

73,03+0,25

60,53-0,25

60,53-0,25

6,25*3550Production of outer pipe N
Pipe 92х7

92,08+0,25

92,08+0,38

77,79-0,25

77,79-0,38

7,145*3600Production of outer pipe H
Pipe 117,4х7

117,42+0,25

117,42+0,38

103,20-0,25

103,20-0,38

7,11*3600Production of outer pipe P
Pipe 43х2,5

42,86+0,20

42,86+0,25

38,10-0,20

38,10-0,25

2,38*3250Production of inner pipeВ
Pipe 55,6х3

55,56+0,20

55,56+0,25

50,01-0,20

50,01-0,20

2,775*3250Production of inner pipe N
Pipe 73х3

73,03+0,20

73,03+0,25

66,93-0,20

66,93-0,25

3,05*3250Production of inner pipe H
Pipe 95,4х3,5

95,40+0,25

95,40+0,38

88,90-0,25

88,90-0,38

3,25*3250Production of inner pipe P

2).The Mechanical properies of drill pipes:

Technical dataTensile Strength, MPAYield Strength, MPAElongation, %Hardness,HRC
4130+SR7306201422-26
30CrMNSIA+QT8507501428-32
4130+QT9508501330-35
Deviation from straightnessNot more than 0,3 mm per 1 meter of length,total 1/6000
Deviation from straightnessNot more than 0,25 mm per 0.2 meter of length from each of the end of pipe
Tolerance for BQ drill rodDeviation of the diameter is 55.75+0,2/-0,2mm, 46.15 +0,2/-0,2mm
Tolerance for NQ drill rodDeviation of the diameter is 70.1+0,15/-0,2mm, 60.4-0,3mm
Tolerance for HQ drill rodDeviation of the diameter is 89+0,38/-0,1mm, 78.1-0,48mm
Tolerance for PQ drill rodDeviation of the diameter is 114.3+0,50, 103.2-0,5mm
EccentricityNot more than 7%


Drill pipes by Eddy Current Examination according to ASTM E309 shall be applied on all tubes using External

Longitudinal
NON-DESTRUCTIVE TEST

notch with depth of no more than 7.5% of wall thickness (maximum notch depth 0.80mm and minimum notch

depth 0.30mm) , 0.30mm maximum width and 25mm maximum length, made from the same chemistry and size

of tubing.

THE CORE DRILLING PIPES SURFACE CONDITION

The tubes must have smooth surface,black surface or black phosphatized.

THE Steel Tubes AND STEEL PIPES MARKING

The request information shall be marked on each tube with paint, and

each bundle shall be identified with a securely attached metal tag.

STEEL TUBES  AND STEEL PIPES SURFACE COATING

The tubes inside and outside shall be coated with a rust inhibitor

PACKING OF ALLOY Seamless Tubes

Standard Export worthy packing, preferably in hexagonal bundle with plastic wrapped and steel strapped.



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If you have any questions our products or services,feel free to reach out to us.Provide unique experiences for everyone involved with a brand. we’ve got preferential price and best-quality products for you.

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Kevin

Mr. Kevin

Email:

sales@hjbearingtube.com

Send Inquiry

Tel:86-0574-87491308

Fax:86-0574-87491848

Mobile Phone:+8613355844917

Email:sales@hjbearingtube.com

Address:Industrial Park, Zhangting Town,Yuyao City, Ningbo, Zhejiang

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