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

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

ASTM A106 GR B FBE Coated Pipe, 10 Inch