A53-B large diameter seamless steel pipe C90 oil and gas field steel pipe anti-corrosion

The difference between precision steel pipe and seamless pipe:1. the seamless steel tube with obvioue difference is that dimensional accuracy, can be up to 0.1mm.2. high precision steel pipe diameter surface finish, the customer without processing can be used directly and ordinary seamless steel tube to the customer and lather,

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The difference between precision steel pipe and seamless pipe:

1. the seamless steel tube with obvioue difference is that dimensional accuracy, can be up to 0.1mm.

2. high precision steel pipe diameter surface finish, the customer without processing can be used directly and ordinary seamless steel tube to the customer and lather, polishing processing.

 

Features:

hydraulic cylinder tube st52 din2391  inside and outside the wall without oxidation layer, under high pressure, no leakage, high precision, high finish, cold bending deformation, flaring, flattening without cracks, surface rust proffing

1. The smaller outer diameter

2. High precision to do small batch production

3. Cold drawn finished products of high precision, good surface quality

4.The steel pipe transverse area is more complex

5. Steel pipe is superior performance, dense metal

Specifiation: 

Standard

DIN2391, DIN2445, EN10305, GB/T 3639, GB 8713

Grade

ST35(E235), ST37, ST24(E255), ST52(E355), 10#, 20#, 35#, 45#

O.D.

30MM-400MM

W.T.

2-30mm

Surface Treatment

Polished , cold drawn , cold rolled, honed, anneal, Srb , od polished  

Packing

1. bundle packing

2. marking as per customer's requests

3. paint on the pipe as per customer request

4. pipe caps as customer request

Condirion of Delivery

1. NBK(+N)

after cold forming, eventually above phase transition point, in a protective atmosphere of annealing oxidation medium

2. GBK(+A)

after cold forming, annealing in non oxidizing medium protective gas

3. BK(+C)

the final heat treatment after cold forming, threfore small steel pipe plasticly, the plasticly degree does not guarantee

4. BKW(+LC)

after final heat treatment, a tiny cold drawing deformation, continue again when machining steel pipe allowed inside certain limits cold deformation(bending, flaring)

5. BKS(+SR)

have a stress relief after cold forming, heat treatment, steel pipe can be carried out within a certain limit in the appropriate processing again

 

 

Size ID*OD (mm) length can be fixed biggest 6M

 40*50

90*110

140*170

190*215

40*55

95*110

145*170

190*220

50*60

95*115

150*170

190*225

50*65

100*110

150*175

200*220

55*70

100*114

150*180

200*225

60*70

100*115

155*180

200*230

60*75

100*120

160*175

200*245

60*78

100*125

160*180

200*250

63*73

105*125

160*185

220*250

63*75

110*125

160*190

220*270

63*76

110*130

160*195

225*250

63*78

115*130

165*190

240*273

65*80

115*135

165*205

250*290

70*80

120*140

170*200

250*300

70*82

125*140

180*200

200*213

70*85

125*145

180*205

200*216

70*90

125*150

180*210

250*266

75*90

130*150

180*215

60*45

80*92

130*155

180*220

70*57

80*95

130*160

185*205

90*80

80*100

135*160

185*215

102*90

85*100

140*160

185*220

 50*40

90*105

140*165

190*210

 55*40

Variety 

Processing

Cylinder Diameter

Straightness

Size Accuracy

W.T/mm

Inner Bore Roughess

Cold drawn

ID30-250

0.3

H9-H11

±10%

0.4~1.6um

Honed tube

ID50-250

0.3

H7-H9

±10%

<0.4um

 

Mechanics performance

Material

Tensile strength

Yield strength

Elongation

Hardness

Ck20/20#/AISI1020

>520 N/ mm2

>375 N/mm2

>15%

>85HB

Ck45/45#/AISI1045

>600 N/ mm2

>520 N/ mm2

>15%

>85HB

ST52/16Mn/Q345D

>600 N/ mm2

>520 N/ mm2

>15%

>85HB

25Mn/STKM 13C-T

>600 N/ mm2

>530 N/ mm2

>15%

>85HB

 

 

 Delivey conditions:

 

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

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