EN 10217-7

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	-
X6CrNiTi18-10	1.4541/321	0.080	1.00	2.00	0.045ᵇ	0.015ᵇ	-	17.0-19.0	-	-	9.0-12.0	Ti 5xC to 0.70
X2CrNiMoN22-5-3	1.4462/Duplex 2205	0.030	1.00	2.00	0.035	0.015	0.10-0.22	21.0-23.0	-	2.50-3.50	4.5-6.5	-
X2CrNiMoN25-7-4	1.4410/Duplex 2507	0.030	1.00	2.00	0.035	0.015	0.20-0.35	24.0-26.0		3.0-4.5	6.0-8.0
ᵇ For tubes welded without filler material the sum of sulphur and phosphorus shall be maximum 0.040 %.

Summary of inspection and testing

Type of inspection and test		Frequency Test category 1	of testing Test category 2	Refer to	Testing standard
Mandatory tests	Cast analysis	one per cast	one per cast	11.1
	Tensile test at room temperature	one per test unit	two per test unit	11.2.1	EN ISO 6892-1:2019
	Flattening testᵃ or	one per test unit	each tube ᶜ	11.4.2	EN ISO 8492:2013
	Ring tensile testᵃ or			11.4.3	EN ISO 8496:2013
	Drift expanding testᵃ or			11.4.4	EN ISO 8493:2004
	Ring expanding testᵃ or			11.4.5	EN ISO 8495:2013
	Weld bend test			11.5	EN ISO 5173:2010
	Leak tightness test a) Hydrostatic test b) Eddy current test	each tube	each tube	11.8
				11.8.1
				11.8.2	EN ISO 10893-1:2011¹
	Dimensional inspection			11.9
	Visual examination			11.10
	NDT of the weld seam ᵇ			11.11
	c) Eddy current				EN ISO 10893-2:2011²
	d) Ultrasonic test				EN ISO 10893-11:2011⁶
	e) Radiographic test				EN ISO 10893-6:2019
	f) Digital radiographic testing				EN ISO 10893-7:2019
	Material identification			11.12

Tube manufacturing process, route, starting material, forming operation and weld condition

1	2	3	4	5
Route	Manufacturing process ᵃ	Starting material	Forming operation	Weld condition ᵇ
01	Arc welding	Hot or cold rolled strip	Continuous forming from strip	As welded ᶜ ᵉ
02				Arc welding	Add New	Add New	Welded, outside ground c e or bead worked *
03				Add New	Add New	Add New	Welded, bead worked *
05	Arc welding	Hot or cold rolled plate or sheet	Single forming from plate or sheet	As welded ᵈ ᵉ
* Bead worked = bead rolled or bead hammered.					Add New	Add New	Add New	Add New
ᵃ Tubes with outside diameter not exceeding 168,3 mm may additionally be brought to the required tube dimensions by cold working ᵇ (see type of condition WCA and WCR in Table 2). ᵇ The terms "as-welded”, “welded, outside ground”, “bead worked" and "cold working" apply to the condition of the tube before heat treatment if required in accordance with Table 2. ᶜ On request, the inside weld can be re-melted. Option 3: The inside weld is re-melted. ᵈ On request, the inside weld can be worked by rolling, remelting or grinding. Option 4: The inside weld is worked by rolling, remelting or grinding. ᵉ The weld seam can be welded using one or more separate layers.					b The terms "as-welded”, “welded, outside ground”, “bead worked" and "cold working" apply to the condition of the tube before heat treatment if required in accordance with Table 2.	Add New	c On request, the inside weld can be re-melted.	d On request, the inside weld can be worked by rolling, remelting or grinding. Option 4: The inside weld is worked by rolling, remelting or grinding.

Delivery conditions

Symbol	Type of delivery condition ᵃ	Surface condition
W0ᵇ	Welded from hot or cold rolled plate, sheet or strip 1D,2D,2E,2B,2R	As welded ᶡ
W1ᵇ	Welded from hot rolled plate, sheet or strip 1D, descaled and/or pickled ᵉ	Metallically clean
W1Aᵇ	Welded from hot rolled plate, sheet or strip 1D, heat treated, descaled and/or pickled ᵉ	Metallically clean	Add New
W1Rᵇ	Welded from hot rolled plate, sheet or strip 1D, bright annealed	Metallically bright
W2ᵇ	Welded from cold rolled plate, sheet or strip 2D, 2E, 2B, 2R, descaled and/or pickled ᵉ	Metallically clean
W2Aᵇ	Welded from cold rolled plate, sheet or strip 2D, 2E, 2B, 2R, heat treated, descaled and/or pickled ᵉ	Metallically clean	Metallically clean
W2Rᵇ	Welded from cold rolled plate, sheet or strip 2D, 2E, 2B, 2R, bright annealed	Metallically bright
WG	Ground ᶜ	Metallically bright-ground, the type and degree of grinding shall be agreed at the time of enquiry and order ᵈ
WP	Polished ᶜ	Metallically bright-polished, the type and degree of polishing shall be agreed at the time of enquiry and order ᵈ
ᵃ Symbols of flat products according to EN 10028-7:2016. ᵇ For tubes ordered with smoothed inside welds ("bead worked") letter "b" shall be appended to the symbol for the delivery condition (e.g. W2Aᵇ). ᶜ Conditions W2, W2A, W2R are usually used as the starting condition. ᵈ It should be indicated in the enquiry or order whether grinding or polishing is to be performed internally or externally, or internally and externally. ᵉ Unless specified at the time of the order the method of descaling and/or pickling is at the discretion of the manufacturer. ᶡ Tubes may have residual scale, welding colours and grease residue.			b For tubes ordered with smoothed inside welds ("bead worked") letter "b" shall be appended to the symbol for the delivery condition (e.g. W2Ab).	c Conditions W2, W2A, W2R are usually used as the starting condition.

Technical properties for wall thicknesses up to 60 mm of austenitic steels in the solution annealed condition (+AT) and information about intergranular corrosion

Steel grade		Tensile properties at room temperature ᵃ					Impact properties ᵃ			Reference heat treatment conditions		Resistance to intergranular corrosion
		Proof strength		Tensile strength	Elongation		Minimum average absorbed energy KV2 J			Reference heat treatment conditions		Resistance to intergranular corrosion
		Rp0,2 min	Rp1,0 min	Rmᵇ	A min (%)		at RT		at -196 °C	Solution temperature ᶜ	Cooling inᵈ ᵉ		Method in EN ISO 3651-2:19 98
Steel name	Steel number	MPa	MPa	MPa	l	t	l	t	t
X2CrNi18-9	1.4307	200	240	500-700	40	35	100	60	60	1000-1100	w, a	yes	A
X5CrNi18-10	1.4301	210	250	520-750	40	35	100	60	60	1000-1100	w, a	yesᶧ	A
X6CrNiTi18-10	1.4541	200	235	500-730	35	30	100	60	60	1020-1120	w, a	yes	A
X2CrNiMo17-12-2	1.4404	190	225	490-690	40	30	100	60	60	1020-1120	w, a	yes	A
ᵃ l = longitudinal; t = transverse. ᵇ For the delivery conditions W 0, W 1 and W 2 which do not include solution annealing, the upper Rm limit may be exceeded by 70 MPa. ᶜ The maximum temperatures are for guidance only. ᵈ w = water; a = air; cooling sufficiently rapid. ᵉ When tested according to EN ISO 3651-2:1998 (Appropriate method, A or B or C, as indicated) up to the limit temperatures indicated in the last column of Table 8. ᶧ In delivery condition. (Normally not fulfilled in the sensitized condition).

Mechanical properties for wall thicknesses up to 30 mm of austenitic-ferritic steels in the solution annealed condition (+AT) and information about intergranular corrosion

Steel grade		Tensile properties at room temperature ᵃ				Impact properties ᵃ			Reference heat treatment conditions		Resistance to intergranular corrosion
		Proof strength	Tensile strength	Elongation A min		Minimum average absorbed energy KV2 J			Reference heat treatment conditions		Resistance to intergranular corrosion
		Rp0,2 min	Rm	(%)		at RT		At -40 °C	Solution temperature ᵇ	Cooling in ᶜ ᵈ		Method in EN ISO 3651-2:1998
Steel name	Steel number	MPa	MPa	l	t	l	t	t
Austenitic-ferritic steels
X2CrNiMoN22-5-3	1.4462	450	700-920	25	20	120	90	40	1020-1100	w, a	yes	B or C
X2CrNiMoN25-7-4	1.4410	550	800-1000	20	20	100	100	40	1040-1120	w	yes	B or C
ᵃ l = longitudinal; t = transverse. ᵇ The maximum temperatures are for guidance only. ᶜ w = water; a = air; cooling sufficiently rapid. ᵈ When tested according to EN ISO 3651-2:1998 (Appropriate method, A or B or C, as indicated) up to 250 °C.

Tolerances on outside diameter and wall thickness

Outside diameter D mm	Tolerance on outside diameter (D)		Add New	Tolerance on wall thickness T		Add New
Outside diameter D mm	Add New	Tolerance class	Permissible deviation	Tolerance class	Permissible deviation
D≤ 168,3	D3	±0,75 % or ± 0,3 mm whichever is the greater	T3	±10 % or ± 0,2 mm whichever is the greater
D≤ 168,3	Add New	D4ᵃ			±0,5 % or ± 0,1 mm whichever is the greater	Add New	±10 % or ± 0,2 mm whichever is the greater
D> 168,3	D2	±1,0%			Add New	Add New
ᵃ Option 18: Tolerance class D4 is specified.					Add New	Add New	Add New	Add New

Maximum height of the weld seam

Dimensions in millimetres				Add New	Add New	Add New
Route Route (according to Table 1)	Weld condition	Maximum height of the weld seam		Maximum height of the weld seam
Route Route (according to Table 1)	Weld condition	Route (according to Table 1)	Add New	T≤ 8	T>8
01, 05, 06 and 07	As welded	0,10 T+0,5	T/6ᵃ ᵇ
02 and 04	Welded, outside ground for D≤ 114,3	0,06 T+0,3	-
02 and 04	Add New	Welded, outside ground for D> 114,3	0,05 T+0,5	T/10
02, 03 and 04	Welded, bead worked	0,15	-
ᵃ Option 28: Different values for the Maximum height of the weld seam are to be agreed in the purchase order. ᵇ Option 29: maximum 4 mm				ᵇ Option 29: maximum 4 mm	Add New	Add New

Tolerances on exact lengths

Length L (mm)	Tolerance on exact length (mm)
L≤ 6 000	+ 5 0
6 000 < L≤ 12 000	+ 10 0
L > 12 000	+ by agreement 0

Relationship Product

APPLICATIONS

FOOD PROCESSING INDUSTRY

EN 10217-7 is a European standard that outlines the requirements for welded stainless steel tubes for pressure purposes. In the food processing industry, EN 10217-7 stainless steel pipes are used in applications where robustness and resistance to pressure and potentially corrosive substances are paramount. Their applications include: Process Piping: They transport liquids and gases at various stages of food production, such as in the pasteurization or fermentation processes, where pressure resistance is crucial. Steam Distribution Systems: These pipes are used to carry steam for sterilization and heating processes, as they can withstand high temperatures and pressures. Heat Exchanger Tubes: They are used in heat exchanger units for heating or cooling products or cleaning solutions, contributing to the efficient and hygienic processing of food. CIP (Clean-In-Place) and SIP (Sterilize-In-Place) Systems: EN 10217-7 tubes withstand the high pressure and temperatures required for cleaning and sterilizing equipment without dismantling it, ensuring high levels of hygiene and productivity. Transfer Lines for Semi-Solids: The pipes are also used to transport semi-solid foodstuffs, like dough or chocolate, that may require controlled pressures during processing. EN 10217-7 stainless steel tubes offer the necessary durability, corrosion resistance, and hygiene, making them well-suited for the demanding environments of the food processing industry.

LIQUID PROCESSING AND CONVEYANCE INDUSTRY

EN 10217-7 specifies the requirements for welded stainless steel tubes for pressure purposes, making it highly suitable for various applications within the liquid processing and conveyance industry. This industry encompasses a wide range of sectors including chemicals, petrochemicals, water treatment, and beverages, among others. Here are some key applications of EN 10217-7 stainless steel tubes in this broad industry: Chemical Processing: These pipes are extensively used in the chemical industry for conveying aggressive chemicals, as they offer excellent resistance to corrosion and chemical attacks. They can withstand the high pressures often required in chemical reaction processes and transfer systems. Petrochemical Applications: In the petrochemical sector, these pipes transport raw materials, intermediates, and finished products. Their high strength and corrosion resistance are vital for ensuring the safe and efficient conveyance of petrochemical fluids, including those under high pressure and temperature conditions. Water Treatment Systems: EN 10217-7 stainless steel tubes are used in various stages of water treatment, including desalination, filtration, and reverse osmosis systems. They can handle the pressure demands and corrosive conditions often present in water treatment applications, ensuring the integrity of piping systems. Food and Beverage Industry: For liquid processing in the food and beverage industry, such as in the production of dairy products, juices, and alcoholic beverages, these tubes offer a hygienic and non-reactive solution that maintains the quality and safety of consumable products. Pharmaceutical Liquid Processing: In the pharmaceutical sector, these tubes are used for the conveyance and processing of liquid pharmaceutical ingredients and products. Their corrosion resistance, ability to maintain purity, and suitability for high-pressure applications are critical for adhering to the stringent standards of the pharmaceutical industry. Dairy Industry: For the conveyance of milk and other dairy products, which require strict hygiene standards and temperature control, EN 10217-7 tubes provide a durable, corrosion-resistant solution that helps maintain product quality. EN 10217-7 stainless steel tubes, with their durability, corrosion resistance, and capacity to withstand high pressures, are a versatile choice for the diverse needs of the liquid processing and conveyance industry, contributing significantly to the safety, efficiency, and reliability of these operations.

OIL AND GAS INDUSTRY

EN 10217-7, specifying the technical delivery conditions for welded tubes made of stainless steels for pressure purposes, finds several critical applications in the oil and gas industry. This industry demands materials that can withstand harsh environments, high pressures, and corrosive substances, making EN 10217-7 stainless steel tubes an ideal choice. Here's how these pipes are applied within the oil and gas sector: Offshore Platforms: Stainless steel tubes are used in offshore oil and gas platforms for various applications, including process piping for the conveyance of oil, gas, and water. These environments are highly corrosive due to the presence of seawater, making the corrosion resistance of EN 10217-7 stainless steel tubes invaluable. Subsea Pipelines: For the transportation of oil and gas from offshore wells to processing facilities onshore or on platforms, stainless steel tubes offer the needed durability, flexibility, and resistance to collapse under high pressure and corrosive environments. Processing Facilities: In onshore oil and gas processing plants, these pipes are used in systems for separating and treating oil, gas, and water. They are also used in steam systems, heat exchangers, and as part of the infrastructure for handling and storing chemicals. Refineries: Within refineries, EN 10217-7 tubes are used in applications such as fluid catalytic cracking units, alkylation units, and for conveying high-temperature products and by-products. Their resistance to high temperatures and pressures makes them integral to refinery operations. Chemical Injection Systems: These systems use stainless steel tubes to inject chemicals at high pressures into wells to enhance oil recovery or protect equipment from corrosion and scaling. The chemical compatibility and strength of these tubes are critical for such applications. Hydraulic Systems: Used for the operation of equipment and machinery, including blowout preventers, actuators, and control systems. The high-pressure resistance of these pipes ensures reliability and safety in operations. LNG (Liquefied Natural Gas) Applications: In the liquefaction and regasification of natural gas, stainless steel tubes are used due to their excellent cryogenic properties, handling the extreme cold without becoming brittle. EN 10217-7 stainless steel tubes' corrosion resistance, durability, and pressure resistance make them perfectly suited to the demanding and varied needs of the oil and gas industry, ensuring safe and efficient extraction, processing, and transportation of oil and gas resources.

PETROCHEMICALS INDUSTRY

EN 10217-7 stainless steel tubes play a crucial role in the petrochemical industry, where they are used for their strength, resistance to high temperatures and pressures, and especially their corrosion resistance to various chemicals. Here's how these pipes are used in the petrochemical sector: Process Piping: In the complex network of tubes that transport raw materials, intermediates, and finished products throughout a petrochemical facility, EN 10217-7 tubes are employed because they can withstand the corrosive substances and the varying temperatures and pressures involved in petrochemical processing. Heat Exchangers: Petrochemical processing often involves extreme temperatures. Stainless steel tubes made to EN 10217-7 standards are used in heat exchangers for their ability to handle these temperature extremes without degrading. Cracking Units: Tubes in cracking units, which break down large hydrocarbon molecules into smaller ones, must withstand particularly harsh conditions, including corrosive substances and high temperatures. Stainless steel pipes according to EN 10217-7 are suitable for such applications. Fluid Transfer: The transfer of fluids in the petrochemical industry, such as oil, gas, solvents, and various chemicals, requires piping that can resist a wide range of chemical corrosives. EN 10217-7 stainless steel tubes are resistant to many of these substances. Storage Tank Facilities: Tubes connect storage tanks to the processing areas and are used in the systems that fill and empty these tanks. The material's durability and corrosion resistance ensure the safe transfer of petrochemical products. Waste Treatment Systems: Petrochemical plants generate waste fluids that can be highly corrosive. Stainless steel pipes according to EN 10217-7 standards are used in waste treatment systems to handle and transport these wastes safely. Emergency Shutdown Systems (ESD): ESDs are critical for the safe operation of petrochemical plants. EN 10217-7 stainless steel tubes provide the required reliability and performance in the event of an emergency due to their mechanical properties and corrosion resistance. The high-quality welds and specific composition of EN 10217-7 stainless steel tubes make them ideal for the demanding environments of the petrochemical industry, ensuring safety, reliability, and efficiency in various applications within the sector.

POWER GENERATION

EN 10217-7 stainless steel tubes find extensive applications in the power generation industry, which demands materials that can withstand high temperatures, pressures, and corrosive environments. These tubes are essential for the construction and maintenance of power plants, where efficiency, reliability, and safety are paramount. Here are some of the applications within the power generation sector: Cooling Systems: Stainless steel tubes are used in the cooling systems of power plants, including nuclear power stations, where they might be part of secondary cooling loops that use water from external sources. Their corrosion resistance is crucial in preventing leaks and maintaining system integrity. Condenser Tubes: In power plants, the condenser is a critical component where steam is condensed back into water after passing through turbines. EN 10217-7 stainless steel tubes are often used as condenser tubes due to their excellent resistance to corrosion and ability to withstand the cooling water's potentially corrosive properties. Heat Exchangers: Heat exchangers in power plants use stainless steel tubes for their durability and ability to handle temperature changes and high-pressure environments, ensuring efficient heat transfer and system performance. Steam Piping: Steam pipes transport steam from the boilers to the turbines and must pihandle high pressures and temperatures. The high-temperature strength and oxidation resistance of EN 10217-7 stainless steel tubes make them suitable for these applications. Feed water Heaters: These components preheat the water before it enters the boiler using steam extracted from the turbines. Stainless steel tubes are used due to their resistance to the corrosive effects of feed water and their strength at high temperatures and pressures. Boiler Tubes: Boilers feature an intricate network of tubes that carry water and steam. EN 10217-7 stainless steel tubes are used for their ability to resist the high temperatures and pressures involved, as well as their resistance to the corrosive byproducts of combustion. Flue Gas Desulfurization Units: Power plants often include systems to reduce sulfur dioxide emissions, and stainless steel pipes are used here for their corrosion resistance against acidic byproducts. Geothermal Power: In geothermal power plants, stainless steel tubes can handle the corrosive fluids and gases, as well as the high temperatures encountered when harnessing geothermal energy. These applications illustrate how the properties of EN 10217-7 stainless steel tubes, such as their resistance to corrosion, high-temperature strength, and durability under high pressure, make them well-suited to the challenging conditions of power generation facilities. The use of these pipes helps ensure the safety, efficiency, and longevity of power generation infrastructure.

PULP AND PAPER INDUSTRY

EN 10217-7 stainless steel tubes are highly valued in the pulp and paper industry for their corrosion resistance, durability, and ability to withstand the harsh chemical environments frequently encountered in paper manufacturing. Here's how these tubes are typically applied within this industrial sector: Chemical Recovery Systems: In the process of recycling chemicals used in the pulping process, stainless steel tubes are essential due to their resistance to the corrosive substances commonly found in black liquor, a byproduct of the pulping process. Bleaching Systems: The bleaching process uses chemicals such as chlorine dioxide to whiten pulp. EN 10217-7 stainless steel tubes are resistant to the corrosive nature of these bleaching agents, ensuring the integrity of the system over time. Pulp Digesters: Digesters are high-pressure vessels used to cook wood chips with chemicals. The corrosion resistance and strength of stainless steel tubes can withstand the chemicals and high temperatures involved in this process. Steam Distribution: The pulp and paper industry requires large amounts of steam for heating and other processes. The high-pressure steam distribution systems often use stainless steel pipes due to their ability to handle high pressures and temperatures without corroding. Wastewater Treatment: Wastewater from paper mills contains a variety of chemicals and organic materials. Stainless steel tubes are used in these treatment systems to prevent corrosion and ensure that the effluent is processed safely and effectively. Water Treatment Plants: For both the intake of fresh water and its treatment after use in the mill, stainless steel tubes can handle the various chemicals and processes involved in treating water to the necessary standards for industrial use. Paper Machine Piping Systems: The paper machine itself uses pipes to transport steam, hot water, and various chemicals across different stages of the paper-making process. The resistance to heat and a variety of corrosive substances makes EN 10217-7 tubes suitable for this application. Condensate Lines: Stainless steel tubes are used to collect and return condensed steam to the boiler, where its corrosion resistance is crucial due to the potential acidity of the condensate. The robust nature of EN 10217-7 stainless steel tubes, along with their proven resistance to a wide array of corrosive chemicals, heat, and pressure, makes them a material of choice in the pulp and paper industry, ensuring uninterrupted, safe, and efficient operations.

SHIPPING BUILDING

EN 10217-7 stainless steel tubes are integral to the shipbuilding industry, which necessitates materials that can perform reliably in marine environments, known for their corrosive nature due to saltwater, as well as varying temperatures and pressures. Here’s a rundown of applications for stainless steel pipes in this field: Piping Systems: The vast network of pipes on a ship includes those for fuel, lubrication, hydraulic fluids, and water systems. EN 10217-7 tubes are used due to their corrosion resistance, which is critical for long-term operation in a saltwater environment. Ballast Water Systems: Ships use ballast water systems to maintain stability. The tubes for these systems need to be durable and resistant to marine organisms and the corrosive nature of seawater, for which stainless steel is ideal. Heat Exchangers and Condensers: Ships use heat exchangers and condensers as part of their engine cooling systems and other applications. Stainless steel tubes in these systems prevent corrosion that would otherwise quickly degrade less resistant materials. Exhaust Systems: The high-corrosion resistance and strength at high temperatures enable EN 10217-7 pipes to be used effectively in ship exhaust systems, where they can withstand hot gases and prevent corrosion from both the exhaust and the marine atmosphere. Fuel and Oil Lines: Transporting fuel and oil on ships requires pipes that can prevent leakage and resist corrosion. EN 10217-7 stainless steel tubes are often selected for these critical applications. Water and Waste Systems: For freshwater delivery and waste removal, stainless steel tubes offer hygienic, corrosion-resistant solutions that ensure the ship's water systems remain uncontaminated and fully operational. Firefighting Systems: Fire prevention and firefighting are critical on ships. Stainless steel tubes are used to ensure that the firefighting system remains operational even after long periods without use. Cargo Handling Systems: For ships that transport corrosive materials, stainless steel tubes are used in their cargo handling systems to prevent contamination and maintain structural integrity. The properties of EN 10217-7 stainless steel tubes, notably their resistance to the corrosive effects of saltwater and marine environments, as well as their strength and durability, make them particularly suitable for the demanding conditions faced in shipbuilding and maritime operations. These tubes help to ensure the safety, longevity, and reliability of various ship systems.

WATER AND WATER TREATMENT

EN 10217-7 stainless steel tubes are widely used in the water and wastewater treatment industry due to their excellent resistance to a wide range of chemicals and corrosive environments. Their durability and mechanical properties make them highly suitable for various applications in this sector. Here's how they are typically utilized: Potable Water Systems: Stainless steel tubes are often used to transport drinking water because they do not corrode easily and do not leach into the water, maintaining its purity and taste. The hygienic properties of stainless steel also prevent bacterial growth within the piping system. Desalination Plants: In facilities that convert seawater into drinkable water, the corrosion resistance of EN 10217-7 tubes is crucial due to the highly corrosive nature of saltwater and the chemicals used in the desalination process. Wastewater Treatment: Stainless steel tubes are utilized in the conveyance of wastewater and in various stages of the treatment process where the material’s resistance to a range of chemicals and corrosive gases is vital. Chemical Dosing: Treatment plants often add chemicals to water or wastewater to facilitate treatment processes, and stainless steel tubes are used for their ability to resist the corrosive effects of these chemicals. Sludge Handling: The processing and transportation of sludge in treatment plants require tubes that can withstand abrasive and corrosive materials, making stainless steel a preferred choice. Water Recycling and Reuse: As water scarcity issues rise, the recycling and reuse of water become more common. Stainless steel pipes offer a durable solution that can handle the treated water without degrading. Distribution Networks: For the delivery of treated water to homes and businesses, stainless steel tubing is an option to ensure that water quality is maintained without the risk of pipe corrosion over time. Cooling Water Systems: In industrial settings, cooling water systems often use stainless steel tubes due to their ability to withstand the corrosive nature of circulating water and treatment chemicals. Ultrafiltration and Reverse Osmosis Systems: These advanced treatment systems require robust piping solutions that can handle high pressures and the aggressive cleaning regimes necessary for membrane maintenance, for which stainless steel tubing is well-suited. Pump and Valve Stations: Stainless steel tubing is often connected to pumps and valves for its strength and corrosion resistance, ensuring a long service life and reliability. By utilizing EN 10217-7 stainless steel tubes, water treatment facilities benefit from reduced maintenance costs, extended infrastructure lifespan, and improved system reliability, all while ensuring that the water being transported or treated meets safety and quality standards.

PHARMACEUTICAL INDUSTRY

EN 10217-7 stainless steel tubes are crucial in the pharmaceutical industry for their corrosion resistance, cleanliness, and inert properties, which are essential for maintaining product purity and contamination control. Here's a concise overview of their uses: Process Tubes: Transport a variety of materials without risk of bacterial buildup or contamination, ensuring easy cleaning and sterilization. Water Systems: Ideal for purified water and Water for Injection (WFI) due to resistance to corrosion from high-purity water. Steam Systems: Used for clean steam delivery in sterilization processes, withstanding high temperatures and preventing contamination. Cleaning Systems: Support Clean-In-Place (CIP) and Sterilization-In-Place (SIP) with resilience to harsh cleaning agents and temperatures. Heat Exchangers/Condensers: Resist a wide range of corrosive process fluids and cleaning agents in heating and cooling applications. Gas Lines: Provide non-reactive and leak-tight pathways for inert and specialty gases used in manufacturing. Waste Disposal: Handle the disposal of hazardous waste with superior resistance to aggressive chemicals. Vent and Drain Lines: Maintain functionality over time, even when carrying aggressive substances. Bulk Drug Production: Prevent contamination and maintain process integrity when handling corrosive materials and solvents. EN 10217-7 tubes in pharmaceuticals ensure regulatory compliance and uphold the industry's stringent cleanliness and sterility standards.

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Available Grades and Chemical Requirements

Available Grades and Chemical Requirements

Summary of inspection and testing

Summary of inspection and testing

Tube manufacturing process, route, starting material, forming operation and weld condition

Tube manufacturing process, route, starting material, forming operation and weld condition

Delivery conditions

Delivery conditions

Technical properties for wall thicknesses up to 60 mm of austenitic steels in the solution annealed condition (+AT) and information about intergranular corrosion

Technical properties for wall thicknesses up to 60 mm of austenitic steels in the solution annealed condition (+AT) and information about intergranular corrosion

Mechanical properties for wall thicknesses up to 30 mm of austenitic-ferritic steels in the solution annealed condition (+AT) and information about intergranular corrosion

Mechanical properties for wall thicknesses up to 30 mm of austenitic-ferritic steels in the solution annealed condition (+AT) and information about intergranular corrosion

Tolerances on outside diameter and wall thickness

Tolerances on outside diameter and wall thickness

Maximum height of the weld seam

Maximum height of the weld seam

Tolerances on exact lengths

Tolerances on exact lengths

Relationship Product

Typical Chemical Composition %

Typical Mechanical Properties

ASTM A554 Wall Thickness/Outside Dimention Tolerances