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Hygienic & Ultra High Purity Stainless Steel Tubes
Company Overview
Rahul Ferromet & Engg. Pvt. Ltd.
for Hygienic & Ultra High Purity Electro Polished & Mechanical Polished Stainless Steel
Tubes for more than 15 years. We understand the importance of surface finish & Weld
Bead Quality in piping system & provide the best solution to END users/OEMs for piping
systems. Rahul Ferromet & Engg. Pvt. Ltd. has set up world class
manufacturing facilities for hygienic tubes in India under the brand name of
proudly offers:
: Cleanability defines how easily contaminates can be removed
from a surface. Our process guarantees the correct finish requirements, chemical
composition & passivity state, with no major physical and / or metallurgical flaws.
: We have full traceability for each of our products. Our traceability starts
with certifications & incoming inspection of raw materials, through in-process quality
control, final inspection, marking & packing.
Every Tube is inspected for all around quality & meticulous inspection insures that every
tube will be of highest quality & in total compliance with its respective standards.
is one of the leading service providers
Maximum Cleanability
Full Traceability
NOTE: (1) The average Ra is derived from readings taken at four cross sections approximately 90° apart. Other Ra readings are available if agreed upon between vendor & owner / user. No single reading exceeding Ra max.
Surface Finish Requirements
Technical DataAcceptance criteria for interior surface finishes as per ASME BPE bioprocessing equipment.
Ra Readings
GENERAL NOTE: All Ra readings are taken across the lay
Standardgrit
Ra RMS
m-m m-m
0.68-0.80
Conversion of Surface Finishes
150grit
180grit
240grit
320grit
0.46-0.58
0.34-0.46
0.21-0.25
0.76-0.89
0.51-0.64
0.38-0.51
0.23-0.28
Nicks None accepted
Pits If dia. <0.020" & bottom is shine
Scratches If length <0.25", depth <0.003", & Ra is met
Star burst None accepted
Surface cracks None accepted
Surface inclusions
Surface residuals None accepted
If polished smooth, blended, & Ra is met
Surface roughness (Ra) See table SF-4
Water stains If no deposits
Weld dross None accepted
Weld porosity None accepted
Anomoly or Indication
If Ra is met & there is no liquid penetrant indication
Cluster of pits None accepted
Demarcation
Acceptance Criteria
If <5% of the total area when visually inspected & Ra is met
Grit lines If Ra is met
Longitudinal welds
Mechanically Polished
m-m
0.375 0.5
SFF2 0.5 0.625
SFF3 0.625 0.75
Ra Average (Note 1)
Surface Designation m-m
SFF1
m-m
0.25
0.5SFF5 0.375
0.625SFF6 0.5
Ra Average (Note 1)
Surface Designation m-m
SFF4
Mechanically Polished & Electropolished
Ra - Max
0.375
From the eye-catching shapes on the cladding of high-rise buildings to the shiny surfaces of household
appliances, surface finish plays an important role in enhancing product appeal. In other applications, for
example in food processing, surface finish has a much more practical role of ensuring process hygiene &
therefore the safe arrival of food on the table.
Choosing the right surface finish can often involve consideration not only of the desired surface appearance,
but also other requirements such as corrosion resistance, hygiene & fabrication. The process of making &
choosing the right surface finish is an art based on science, & it is both in the art & the science that we excel in.
understand the need of cleanability & sterilibility in the Pharma / Biotech / Food / Dairy / Beverage
process & works to give total solutions for best surface finish & welding quality. To ensure complete drainability
in the system our products are manufactured to perfection with the help of best infrastructure & raw materials.
Our capabilities include:
Fully Automated European Tube Production Line with Inline Bright Annealing & Inline Eddy current
testing.
In house facility for Electro Polishing & Mechanical Polishing for both inside & outside tube surface.
are manufactured with Environmental Friendly Technology.
In House facility for inspecting inner surface of tubes with Boroscope Instruments.
Only facility in India providing surface finish & packaging of the final product in accordance of ASME
BPE guidelines.
We understand the need of surface finish for maximum sterility, our facility can give you the finish of
SF1 for mechanical polish & SF4 for electro polish. We will supply all the material with surface finish test
certificates.
When it comes to the stringent process of Biotech & Biopharmaceutical where the roughing is a major
constraint, we are able to give you DIN 1.4435 material which has low Ferrite & high Chromium, Nickel,
Molybedum which decreases the chances of roughing in the system.
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Unique Features of
Roughing
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To achieve the best orbital weld quality there is requirement of controlled Sulphur in Stainless steel as
normal SS316L is not good enough to give you best results. uses controlled Sulphur material
for all its products.
All our products are washed with DI water & capped on both sides before polythene packaging which
ensures that you will receive the tubes ready for orbital welding.
Our ERP software & Barcode System allows us to efficiently track various orders simultaneously. This
helps us in arranging the raw material & planning the production schedule well in advance to fulfil our
delivery commitments.
We promise ready stock – short lead time delivery with excellent quality & best service at competitive
pricing.
The first & foremost requirement in orbital welding is the facing of the tubes. All the tubes from
are mill faced & ready for orbital welding.
During orbital welding weld bead runs towards low sulphur content material
Non accepted weld bead Non accepted weld bead
Non accepted weld bead Accepted weld bead
Pharmaceutical / Biotech Industry
proudly presents their products designed
for use in the Pharmaceutical & Bio-Technologies
Industries. This line consists of Weld ends
suitable for use with Orbital Welding Equipment.
offers BioPharma Tubes that are
manufactured in compliance with the current ASME
BPE Standard.
The surface finish of piping & related components
can be a critical factor in their performance,
maintenance costs, & service life. Until recently,
specifying & measuring surface finish involved
varying degrees of speculation. In Pharma industry
the demand is for a process to achieve the best
surface. This can be achieved by ElectroPolishing.
Electropolishing is an electrolytic process (the
reverse of plating) combining electric current &
chemicals to remove metal. The peaks of burr, folds,
inclusion & other anomalies of a metal surface are
dissolved more quickly than valleys as a result of the
greater concentration of current over the
protuberances. This electrochemical action
produces a smooth surface measuring less than
0.2RA.
All BPE Tubes are individually capped & bagged in
clear 6 mil. poly bags. All products are labeled with a
bar code, product information & manufacturing date.
This provides the optimum identification & ensures
that the product arrives to the job site in a clean
orbital weld condition.
are designed to meet
customer demands for enhanced
hygienic components. These are
implemented in processing lines
throughout the Food & Beverage
Industry and are a safe & sure choice.
In pursuit of faster & more efficient
production, innovation is both a
business & a consumer obligation
resonating through the Food &
Beverage Industry. is
proud to be a leader in industrial
innovation, which is reflected in our
designs, production methods &
technologies.
The mechanical polishing process starts with the simultaneous deburring of both ends of a tube. To achieve the desired interior surface finish, an abrasive material, fitted onto a pneumatic polishing head, rotates within the tube for many cycles. Any interior residue is removed by blowing a clean wipe through the tube before visual inspection.
Various types of polishing operations are commonly used to reduce the surface roughness of stainless steel tubes used in fluid piping & related components. As the name implies, mechanical polishing involves the application of physical force on abrasive media to remove surface irregularities.
Food & Beverage
SizeOD THK
MM MM
3/4" 19.10 1.65
1" 25.40 1.65
1 1/2" 38.10 1.65
2" 50.80 1.65
2 1/2" 63.50 1.65
3" 76.20 1.65
4" 101.6 2.11
12.70 1.65
Product Details
3A stainless steel sanitary tubes
The purpose of the 3A sanitary standard is to formulate design criteria to cover a single piece of equipment
relating to accepted practices by users, equipment manufacturers & the international association of milk, food
& environmental sanitarians.
Specification : ASTM A270 CompliantMaterial : 304L / 316L / DIN1.4404Length : 6.1Mtr.Surface finish : Bright Annealed, Mill Finish is available
for both ID/ODMechanical Polish, Electro Polish needs to specify either ID/OD
ASME BPE stainless steel sanitary tubes
ASME BPE a set of guidelines designed for the requirements of the bioprocessing, pharmaceutical, &
personal care product industries as well as other applications with relatively high levels of hygienic
requirements, covering directly or indirectly the subjects of materials, design, fabrication, welding inspections,
testing, & certifications.
Specification : ASTM A270 S2 CompliantMaterial : 316L / DIN1.4404 / DIN1.4435Length : 6.1Mtr.Surface finish : SF0 - Bright Annealed, Mill Finish is available
for both ID/DOSF1-SF3-Mechanical PolishSF4-SF6-Electro Polish
SizeOD THK
MM MM
3/4" 19.10 1.65
1" 25.40 1.65
1 1/2" 38.10 1.65
2" 50.80 1.65
2 1/2" 63.50 1.65
3" 76.20 1.65
4" 101.6 2.11
12.70 1.651/2"
ISO/SMS stainless steel sanitary tubes
SMS-Swedish Milk standard for stainless steel tube for the food industry & other hygienic applications.
Specification : SMS 3008 CompliantMaterial : 304L / 316LLength : 6.1Mtr.Surface finish : Bright Annealed, Mill Finish is available for
both ID/ODMechanical Polish, Electro Polish needs to specify either ID/OD
SizeOD THK
MM MM
1/2"
1.20
1.20
1.20
1.60
1.60
2.00
1" 25.0
1 1/4" 32.0
2" 51.0
2 1/2" 63.5
3" 76.1
4" 101.6
1.201 1/2" 38.0
GRADECARBON SILICON
C Si
304L
316
316L
1.4404*#
1.4435
304 Max 0.08
MANGANESE
Mn
SULPHUR
P S
MOLYCHROMIUM
MoCr
18.00~20.00
PHOSPHORUS NICKEL
Ni
Max 0.03
Max 0.08
Max 0.03
Max 0.03
Max 0.03
Max 0.75
Max 0.75
Max 0.75
Max 0.75
Max 1.00
Max 1.00
Max 2.00
Max 2.00
Max 2.00
Max 2.00
Max 2.00
Max 2.00
Max 0.045
Max 0.045
Max 0.045
Max 0.045
Max 0.045
Max 0.045
Max 0.030
Max 0.030
Max 0.030
Max 0.030
0.005 - 0.017
0.005 - 0.017
18.00~20.00
16.00~18.00
16.00~18.00
16.50~18.50
17.00~19.00
-
-
2.00~3.00
2.00~3.00
2.00~3.00
2.50~3.50
8.00~10.50
8.00~12.00
10.00~14.00
10.00~14.00
10.00~15.00
12.50~15.00
Raw Material Details
BS 4825 stainless steel sanitary tubes
BS-4825 – stainless steel tube for the food industry & other hygienic applications. BS is widely used throughout
the UK hygienic industries. It can be used on permanently installed pipelines but it is also designed for use
where systems are frequently dismantled. RJT – conforming to BS 4825 part 5 should be used in applications
where manual cleaning is employed. Particularly suited where lines are frequently dismantled due to their
robust construction & ease of alignment.
Specification : BS 4825-1 CompliantMaterial : 304L / 316L / DIN1.4404Length : 6.1 Mtr.Surface finish : Bright Annealed, Mill Finish is available for
both ID/ODMechanical Polish, Electro Polish needs to specifyeither ID/OD
1.20
1.60
1.60
1.60
1.60
1.60
2.00
SizeOD THK
MM MM
3/4" 19.10
1" 25.40
1 1/2" 38.10
2" 50.80
2 1/2" 63.50
3" 76.20
4" 101.6
1/2" 12.7 1.20
* Controlled sulphur material # Low ferrite material
Note: Customized products also available on request.
Quality Control Facilities
Description SpecificationTest Testing ProcessSr.
No.
1
AS PERASTM E-426
Eddy
Current
2 This test is carried out on the entire length
of the tubes to determine the sub surface in
homogeneties.
AS PERASTM A370
Flattening
Test
7 A tube sample 4" - 6" in length is flattened
between parallel plates with the weld 90°
from the direction of applied force until
opposite walls of the tubing meet.
The welded part of a qualified product
should be without any cracking. The steel
pipe is tightly compressed and the welded
portion is not broken..
ASME / ANSI
B46.1
Boroscopy
Test
5 100% Boroscoping
Boroscopy provides high resolution image of inner surface & weld line of tubes to check the pits, burrs or irregularities of weld bead.
AS PERASTM-A450 & 530
Hydro
Test
3 100% Hydrostatic is carried out on all pipes
& tubes using hydraulic & pneumatic
system.
AS PERASTM A370
Flaring
Test
6 This Procedure tests the ability of a section
of tube approximately 4" in length to flare
(with a tool having a 60° included angle)
until the tube at the mouth of the flare has
been expanded required percentages of
the inside diameter, without cracking or
showing flaws.
Chemical
Analysis
Each and every tube should be PMI and
spectro test of each heat.
Surface
Finish
4 Surface finish measured with Profilometer
reading at 90 degrees to major polishing
pattern.
ASME / ANSI
B46.1
BN-SP-UE 301
Description SpecificationTestSr.
No.
Flange
Test
8 As shown in the figure when the pipe end is
pressed to form an edge, the welded portion
should not show any cracking.
AS PERASTM A370
Reverse-
Bend Test
The sample shall be opened & bent around
a mandrel with a maximum thickness of
four times the wall thickness, with the
mandrel parallel to the weld & against the
original outside surface of tube. There shall
be no evidence of cracks or overlaps.
AS PERASTM A370
10
IGC
(Detecting
Susceptib-
ility to
Intergran-
ular Attack
in
Austenitic
Stainless
Steel. )
• Practice A - Oxalic Acid Etch Test For Clarification of Etch Structures – 90 seconds
• Practice B - Ferric Sulfate–Sulfuric Acid Test – 120 hours
• Practice C - Nitric Acid Test – 240 hours
• Practice E - Copper – Copper Sulfate – 16% Sulfuric Acid Test – 15 hours
• Practice F - Copper – Copper Sulfate – 50% Sulfuric Acid Test – 120 hours
15 ASTM A-262
Grain
size
An accurate assessment of grain size in the
specimen is used to verify the effectiveness
of a particular manufacturing process, such
as heat treating.
AS PERASTM E112
14
Reverse
Flattening
Test
As shown in the figure, the pipe is unfolded
into a plate & no evidence of cracking
should be found
AS PERASTM A370
9
Hardness
Test
Rockwell testing is done under 100kgf &
150kgf loads.
Superficial testing is done under 15kgf,
30kgf & 45kgf loads.
Superficial testing is generally done to
check surface hardness, & or variation in
surface hardness.
AS PERASTM A370, E18
11
Impact Test( Charpy V – Notch )
The load is applied as an impact blow from
a weighted pendulum hammer that is
release from a position at a fixed height h.
The specimen is positioned at the base &
with the release of pendulum, which has a
knife edge, strikes & fractures the specimen
at the notch.
AS PERASTM A370
Tensile
Test
The specimen is placed into the tensile
machine, & slowly stretched until failure. A
computer records the ultimate & yield
tensile strengths, as well as the elongation
of the specimen.
AS PERASTM A370, E8
12
13
Testing Process
Office
609, Sanket Heights, Nr. Akshar Chowk,
Vadodara - 390 020, Gujarat, INDIA
Works
Plot No. 14, Jhagadia G.I.D.C.,
Bharuch - 393 110,
Gujarat, INDIA
0265 298 1100 0265 298 2200
www.rensatubes.com
Product From :
www.purplecrayonindia.com
