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EN 10357

EN 10357

EN 10357 Tubes refers to a set of European standards that specifies the requirements for welded and seamless stainless steel tubes used in the food and chemical industry. These tubes are often used for conveying liquids, gases, and other materials in sanitary applications where cleanliness and hygiene are of utmost importance. MW Metal is expertise in manufacturing and distribution of EN 10357 tubes with full size range covering all series.

Available Grades and Chemical Requirements

Available Grades and Chemical Requirements

Steel grade
C
Si
Mn
P
S
N
Cr
Cu
Mo
Ni
Others
Steel name
Steel number
max
max
max
max
max
X5CrNi18-10
1.4301/304
0.070
1.00
2.00
0.045ᵇ
0.015ᵇ
≤0.10
17.5-19.5
-
-
8.0-10.5
-
X2CrNi18-9
1.4307/304L
0.030
1.00
2.00
0.045ᵇ
0.015ᵇ
≤0.10
17.5-19.5
-
-
8.0-10.0
-
X2CrNiMo17-12-2
1.4404/316L
0.030
1.00
2.00
0.045ᵇ
0.015ᵇ
≤0.10
16.5-18.5
-
2.00-2.50
10.0-13.0
-

Preferred dimensions and tolerances a (mm)

Preferred dimensions and tolerances a (mm)

Series

A

External tube diameter

19

23

29

35

41

53

70

85

104

129

154

204

254

External diameter tolerances

±0.10

±0.12

±0.15

±0.18

±0.21

±0.27

±0.35

±0.43

±0.78

±0.97

±1.16

±1.53

±1.91

Internal diameter (theoretical)

16

20

26

32

38

50

66

81

100

125

150

200

250

Wall thickness

1.5

1.5

1.5

1.5

1.5

1.5

2.0

2.0

2.0

2.0

2.0

2.0

2.0

Wall thickness tolerances

±0.15

±0.15

±0.15

±0.15

±0.15

±0.15

±0.20

±0.20

±0.20

±0.20

±0.20

±0.20

±0.20

a For dimensions different from the ones listed above the tolerances are:

EN ISO 1127-D4 for external diameter ≤ 85,00 mm.

EN ISO 1127-D3 for external diameter > 85,00 mm.

In external diameter tolerances ovality is included.

For wall thickness ±10%.

Alternative dimensions and tolerances a (mm)

Alternative dimensions and tolerances a (mm)

Series

C

External tube diameter

19.05

25.4

38.1


50.8

63.5

76.2

101.6

152.4

External diameter tolerances

±0.13

±0.13

±0.20

±0.20

±0.25

±0.25

±0.38

±0.76

Internal diameter (theoretical)

15.75

22.10

34.80

47.50

60.20

72.90

97.38

146.86

Wall thickness

1.65

1.65

1.65

1.65

1.65

1.65

2.11

2.77

Wall thickness tolerances

±0.17

±0.17

±0.17

±0.17

±0.17

±0.17

±0.21

±0.28

Series

D

External tube diameter

25.0

32.0

38.0

51.0

63.5

76.1

101.6

External diameter tolerances

±0.13

±0.16

±0.19

±0.25

±0.32

±0.38

±0.76

Internal diameter (theoretical)

22.6

29.6

35.6

48.6

60.3

72.9

97.6

Wall thickness

1.2

1.2

1.2

1.2

1.6

1.6

2.0

Wall thickness tolerances

±0.12

±0.12

±0.12

±0.12

±0.16

±0.16

±0.20

ᵃ For dimensions different from the ones listed above the tolerances are:

EN ISO 1127-D4 for external diameter ≤ 76,20 mm.

EN ISO 1127-D3 for external diameter > 76,20 mm.

In external diameter tolerances ovality is included.

For wall thickness ± 10%.

Manufacturing process, requirements and surface characteristics

Manufacturing process, requirements and surface characteristics

Surface characteristics and roughness
Product class
Manufacturing process
Heat Treatment
Internal surface
Internal weld bead
External surface and welding area
Symbol
CL1
(0.80/1.60 μm)
From cold rolled materialᵃ Welded,welding bead rolled
Not heat treated
Ra ≤ 0,80 μm pickled and passivated
Ra ≤ 1,60 μm pickled and passivated
pickled and passivated
CL1 CC
Mech. polished, Ra ≤ 1,00 μm
CL1 CD
Heat treated
Ra ≤ 0,80 μm pickled and passivated or bright annealed
Ra ≤ 1,60 μm pickled and passivated or bright annealed
pickled and passivated or bright annealed
CL1 BC
Mech. polished, Ra ≤ 1,00 μm
CL1 BD
CL2
(0.80/0.80 μm)
From cold rolled materialᵃ Welded,welding bead rolled
Not heat treated
Ra ≤ 0,80 μm pickled and passivated
Ra ≤ 0,80 μm pickled and passivated
pickled and passivated
CL2 CC
Mech. polished, Ra ≤ 1,00 μm
CL2 CD
Heat treated
Ra ≤ 0,80 μm pickled and passivated or bright annealed
Ra ≤ 0,80 μm pickled and passivated or bright annealed
pickled and passivated or bright annealed
CL2 BC
Mech. polished, Ra ≤ 1,00 μm
CL2 BD
ᵃ From cold rolled material according to EN 10028-7:2016,Table 6, finish 2B, 2D or 2R.
Tubes that are not bright annealed and not heat treated shall be internally and externally pickled and passivated. After rinsing,residual acid or welding discolouration shall not be present. Further cleanliness requirements shall be agreed upon in the order.
The weld shall be worked down so that it is flush with the tube wall and then smoothed. There shall be no overlapping of the weld metal and parent metal. There shall also be no protrusions root gaps (lack of full penetration),overlapping or misalignment of edges,open pores (porosity) or traces of rolling.

Relationship Product

Typical Chemical Composition %

Typical Mechanical Properties

ASTM A554 Wall Thickness/Outside Dimention Tolerances

Wall Thickness Tolerances
± 10% of specified wall thickness

APPLICATIONS

FOOD INDUSTRY
FOOD INDUSTRY
EN 10357 stainless steel tubes are widely utilized in the food industry for their corrosion resistance, hygiene, and durability. They are essential in several applications: Product Transport: These tubes are used to transport milk, juices, oils, syrups, and other liquid foods, ensuring no contamination or taste alteration. Cleaning In Place (CIP) Systems: The high-quality stainless steel allows for rigorous cleaning protocols, necessary for maintaining food safety. Heat Exchangers and Cooling Systems: Their resistance to corrosion and temperature changes makes them ideal for temperature regulation equipment. Process Piping: EN 10357 tubes offer a hygienic and non-reactive environment crucial for the food processing industry, ensuring that there is no chemical interaction between the pipes and the food products. Fermentation and Storage: Stainless steel tubes are used in fermentation processes and for storage tanks in beverage production, where maintaining the product's purity is vital. The use of EN 10357 stainless steel tubes ensures that standards for cleanliness, product quality, and safety are met within the food industry.
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CHEMICAL INDUSTRY
CHEMICAL INDUSTRY
In the chemical industry, EN 10357 stainless steel tubes are highly valued for their corrosion resistance, durability, and ability to maintain purity in aggressive environments. Their applications are broad and critical to the operations within this sector, including: Process Piping: Used extensively for the safe transport of chemical substances, including acids, alkalis, and solvents, within manufacturing facilities. Their corrosion-resistant properties ensure that the pipes do not react with the chemicals, maintaining the purity and integrity of the substances being transported. Heat Exchangers: Due to their excellent thermal conductivity and resistance to high temperatures, these stainless steel tubes are ideal for heat exchangers in chemical processing. They efficiently transfer heat without being corroded by the chemical products or by-products. Fluid Transfer Systems: EN 10357 tubes facilitate the movement of liquids and gases throughout chemical plants. They are used in systems for transferring raw materials, intermediates, and finished products, ensuring leak-proof and contamination-free transport. Waste Treatment: Chemical industries generate various waste streams that can be corrosive or toxic. Stainless steel tubes compliant with EN 10357 are used in waste treatment and disposal systems, handling hazardous materials safely and efficiently. Storage and Distribution: For storing and distributing chemicals, whether in liquid or gas form, these stainless steel tubes offer a safe and durable solution. They resist the corrosive effects of chemicals and prevent any leaching that could contaminate the stored substances. EN 10357 stainless steel tubes are indispensable in the chemical industry, providing a reliable infrastructure for processing, handling, and disposing of chemicals safely while adhering to strict industry standards for quality and purity.
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PHARMACEUTICAL INDUSTRIES
PHARMACEUTICAL INDUSTRIES
In the pharmaceutical industry, EN 10357 stainless steel tubes are integral due to their high sanitary standards, corrosion resistance, and non-reactive properties. Their applications include: Process Piping: Used for transporting raw materials, intermediates, and finished pharmaceutical products while maintaining a contaminant-free environment. Purified Water Systems: Critical for systems that handle water for injection (WFI) and purified water, where any impurity can significantly affect product quality. Clean-in-Place (CIP)/Steam-in-Place (SIP) Systems: Their compatibility with high-temperature steam and cleaning agents makes them suitable for sterilization processes. Vent and Drain Lines: Reliably manage the venting and draining requirements in pharmaceutical manufacturing with minimal risk of corrosion or contamination. Transfer of Active Pharmaceutical Ingredients (APIs): These tubes ensure that APIs are handled in a pure and unadulterated form throughout the manufacturing process. The use of EN 10357 stainless steel tubes in the pharmaceutical industry helps maintain stringent hygiene standards and protects against contamination, which is crucial for the safety and efficacy of pharmaceutical products.
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