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2b 2d Mill Surface Finish Pipe

Best Price & Fast Delivery Of Hot Rolled Annealed Steel Tube/ Tubing In India, Get Stock Of Surface Roughness Pipe For Sale

2b 2d Mill Surface Finish Pipe

 

The 2d mill finish stainless steel pipe is a smooth, non-reflective cold-rolled pipe that has been annealed and pickled or descaled finish. This non-directional standard pipe surface finish is well favoured by most buyers due to its retention of lubricants in deep drawing applications.

Conversely, the 2b mill finish pipe also has a smooth finish while being produced in a cold-rolled annealed steel which is pickled or descaled finish. However, the difference is between 2d and 2b is that the 2b mill stainless steel pipe internal surface finish is moderately reflective. Typically, the 2b 2d Mill Surface Finish Pipe is produced by imparting a final light cold-rolled pass with the use of polished rolls that have a large diameter.

This general-purpose surface finish of stainless steel pipe is more readily polished in comparison to either No 1 or 2D finishes. Product with 2B stainless steel pipe surface finish is normally supplied in the annealed state plus the pipe is also lightly cold-rolled unless a tensile-rolled product, which is harder and stronger has been specified. The stainless steel pipe surface finish chart is particularly common in chemical, industrial, as well as the food processing applications such as in processing piping systems including vessels and tanks.

 

Stainless Steel Pipe Surface Finish Types
  • No. 0: Hot-rolled and annealed
  • No. 1: Hot-rolled, annealed, and passivated
  • No. 2D: Cold-rolled, annealed, pickled, and passivated
  • No. 2B: Cold-rolled, annealed, pickled, and passivated, with an additional pass through highly polished rollers
  • No. 2BA: Bright annealed, which is similar to 2B but has an additional step in which the steel is annealed in an oxygen-free atmosphere
  • No. 3: Coarse
  • No. 4: Brushed
  • No. 5: Satin
  • No. 6: Matte
  • No. 7: Reflective
  • No. 8: Mirrorlike
  • No. 9: Bead blast
  • No.10: Any of several electropolished or heat-colored surfaces


Buy hot rolled annealed tubing, Mill Surface Finish Pipe directly from manufacturers, View 2b mill finish pipe price

 

Surface Finish Math and Equations
To Calculate
Equation
Notes
Ra

Ra = CLA = (M1 + M2 + M3 + M4) / 4

Where:

M1, M2, … Mn are measure values

Average Roughness in micro-meters or micro-inches. Ra is the arithmetic mean deviation of the profile
Rc   Mean height of profile irregularities
Rku   Kurtosis of the profile
Rmax   Maximum roughness depth
Rmr   Material Ration of the profile
Rp Rp = MAX( M1, M2, M3, … ) Max profile peak height
Rq Rq = RMS Root mean square deviation of the profile
Rsk   Skewness of the profile
Rt   Max height of the profile
Rv Rv = MIN( M1, M2, M3, … ) Max Profile Valley Depth
Ry   Max height of the profile
Rz

Rz = Ra x 7.2

This is a very ROUGH estimate and not an exact conversion!

Avg Max height of the profile
Rz ISO   Roughness Height
RPM   Average max profile peak height
RMS RMS = SQRT( (M1^2 + M2^2 + M3^2 + M4^2) / 4 ) Root Mean Square
     
     
CLA CLA = Ra Center Line Average
Cut-Off Length   Length required for sample
N N = Ra (um) x 40 New ISO (Grade) Scale Numbers

 

Some values of surface finish

Standard Grit
(reference only)
Ra µin Ra µm RMS µin RMS µm
150 27 - 32 0.68 - 0.80 30 - 35 0.76 - 0.89
180 16 - 23 0.46 - 0.58 20 - 25 0.51 - 0.64
240 14 - 18 0.34 - 0.46 15 - 20 0.38 - 0.51
320 8 - 10 0.21 - 0.25 9 - 11 0.23 - 0.28
 

 

Surface Finish Comparison
RMS
(Micro-inch)
RMS
(Micron)
Ra
(Micro-inch)
Ra
(Micron)
Grit Finish
160 4.06 142 3.61 36
98 2.49 87 2.21 60
80 2.03 71 1.80 80
58 1.47 52 1.32 120
47 1.20 42 1.06 150
47 1.20 42 Before
Bead Blast
1.06 USDA
Bead Blast
34 0.86 30 0.76 180
21 0.53 19 0.48 220
17 0.43 15 0.38 240
14 0.36 12 0.30 320
10 0.25 9 0.23 400
5 0.13 4 (+/-) 0.10 Mirror

 

Typical Standards

The following industry standards provide guidelines for roughness that our products meet, and exceed:

BS Assessment of surface texture - guidance and general
1134:2010 information
ISO 4287-1 Surface Roughness Terminology Part 1
ANSI B46.1 Surface texture, surface roughness, waviness and lay

 

various types of Surface Finish Pipe

ASTM A53 Gr.B Galvanized Carbon Steel Pipe, OD 33.4 MM, SCH 5S
ASTM A53 Gr.B Galvanized Carbon Steel Pipes, OD 33.4 MM, SCH 5S
ASTM A53 Gr.B Galvanized Steel Pipe, 5.8 Meters, Plain End
ASTM A53 Gr.B Galvanized Steel Pipes, 5.8 Meters, Plain End
API 5L X42 Seamless Pipe, 8 Inch, 12M, FBE Coated, SCH.STD
API 5L X42 Seamless Pipes, 8 Inch, 12M, FBE Coated, SCH.STD
Black Surface Carbon Steel Pipe, ASTM A106, SCH80, DN15
Black Surface Carbon Steel Pipes, ASTM A106, SCH80, DN15
API 5L Gr B Seamless Pipe, SCH 40, 6M, DN200
API 5L Gr B Seamless Pipes, SCH 40, 6M, DN200
Beveled Black Line Pipe, SCH 80, 8 Inch, 12M
Beveled Black Line Pipes, SCH 80, 8 Inch, 12M
A53 Grooved Galvanized Pipe, SCH 40, 6 Inch
A53 Grooved Galvanized Pipe, SCH 40, 6 Inch
ASTM A106 GR B FBE Coated Pipe, 10 Inch
ASTM A106 GR B FBE Coated Pipe, 10 Inch

 

 

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