EN 10217-7 Stainless Steel Pipe & Tube

EN 10217-7 Stainless Steel Pipe is a European standard that specifies the technical delivery conditions for welded stainless steel pipes intended for pressure purposes. These pipes are commonly used in industries such as oil and gas, chemical processing, power generation, and food processing, where high corrosion resistance and pressure integrity are required.

The standard covers austenitic, austenitic-ferritic (duplex), and ferritic stainless steel grades.Common grades include 1.4301 (304), 1.4401 (316), 1.4436 (316L), and 1.4462 (duplex 2205).

What are the 4 types of stainless steel?

The four general groups of stainless steel are austenitic, ferritic, duplex, and martensitic.

Austenitic

As the most frequently used type, austenitic stainless steels possess high chromium and nickel content. Their weldability, strength, and corrosion resistance make them a metal used both for household kitchen cutlery and structural components in the aerospace industry. Unlike ferritic types, austenitic stainless steels are not magnetic.

Ferritic

An often magnetic, low nickel material with good corrosion resistance, ferritic stainless steels are a popular material for indoor applications. They are commonly chosen for their resistance to stress corrosion and cracking, particularly in situations that require contact with other corrosive materials. These uses include cookware and car components. Ferritic stainless steel’s cost effectiveness and decreased malleability differentiate them from austenitic types.

Duplex

Named for its nearly 50/50 composition of austenitic and ferritic, this hybrid is stronger than either of its alloys of origin. This strength gives duplex stainless steels improved corrosion and cracking resistance. Additionally, due to its high ferritic content, it is magnetic. Duplex stainless steels are relatively weldable and well suited for saltwater corrosive conditions, making them useful for the underwater oil industry.

Martensitic

With a structure similar to ferritic, martensitic stainless steels stand apart with their higher carbon content (1%) and greater hardening capabilities. With their high strength and average resistance to corrosion, martensitic stainless steels have a wide range of uses, ranging from surgical instruments to turbine parts.

What is EN 10217-7 material?

EN 10217-7 is a European standard for stainless steel tubes used for pressure purposes. The standard covers the technical delivery conditions for welded tubes that are made of austenitic and austenitic-ferritic stainless steel. 

The tubes are intended to resist corrosion and pressure at room temperature, low temperatures, and elevated temperatures.

The standard includes chemical compositions, delivery conditions, and process route symbols. It also includes ambient temperature mechanical properties, dimensional and tolerance requirements, and optional tests.

EN 10217-7 1.4404 Welded Pipe Specifications

Standard	EN 10217-7
Tube Type	Welded Tube
Grades	1.4301, 1.4307, 1.4404, 1.4541, 1.4571, 1.4462
Finishing	As Welded, Annealing Pickling, Bright Annealing, Polished
Outside Diameter	6 Up To 508 Mm
Thickness	0.5 Up To 8 Mm

EN10217-7 Standard Scope

This document specifies the technical delivery conditions in two test categories for welded tubes of circular cross-section made of austenitic and austenitic-ferritic stainless steel which are intended for pressure and corrosion resisting purposes at room temperature, at low temperatures or at elevated temperatures.

Classification

According to the classification system in EN 10020:2000, the steel grades are classified as: — austenitic steels (corrosion resisting);

Designation

For the tubes covered by this document the steel designation consists of: — the number of this document (EN 10217-7); plus either: — the steel name according to EN 10027-1:2016; or: — the steel number allocated according to EN 10027-2:2015.

Tube manufacture and conditions

The tubes shall be manufactured from hot or cold rolled plate, sheet or strip in accordance with EN 10028-7:2016. They shall be longitudinally welded by fusion across the abutting edges using either an arc welding or a laser welding or an electron beam welding process, or a combination thereof. The definitions of these respective fusion welding methods are given in ISO/TR 25901-3:2016, 4.2. Welding can be performed with or without the addition of filler metal in accordance with one of the routes as specified in Table 1.

Unless Option 2 is specified, the manufacturing process and/or route are at the discretion of the manufacturer.

Option 2: The tube manufacturing process and/or route is specified by the purchaser. The finished tubes shall not include welds used for joining together lengths of the hot or cold rolled strip prior to forming.

Option 3: (see Table 1).

Option 4: (see Table 1)

Table 1 — 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 ce
02				Welded,outside ground ce or bead worked*
03				Welded,bead worked*
04	Laser welding	Hot or cold rolled strip	Continuous forming from strip	Welded,outside ground Cor bead worked*
05	Arc welding	Hot or cold rolled plate or sheet	Single forming from plate or sheet	As welded de
06	Laser weldingahd arc welding**	Hot or cold rolled plate or sheet	Single forming from plate or sheet	As welded de
07	Electron beam welding and arc welding**	Hot or cold rolled7 plate or sheet	Single forming from plate or sheet	As welded de

*   Bead worked = bead rolled or bead hammered.

**  For these tubes, i.e. tubes welded from plate or sheet, the laser welding and the electron beam welding processes are normally used in combination with an arc welding process.

^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.

EN10217-7 Steel Grades Chemical Composition

Steel Grades		Chemical Composition (% By Mass – Max Unless Stated)
Steel Name	Steel Number	C	Si	Mn	P	S	Cr	Mo	Ni	Cu	N	Others	In 10296-2?
X2CrNi18-9	1.4307	0.03	1	2	0.045	0.015	17.5/19.5	–	8.0/10.0	–	0.11	–	Yes
X2CrNi19-11	1.4306	0.03	1	2	0.045	0.015	18.0/20.0	–	10.0/12.0	–	0.11	–	Yes
X2CrNiN18-10	1.4311	0.03	1	2	0.045	0.015	17.0/19.5	–	8.5/11.5	–	0.12/0.22	–	Yes
X5CrNi18-10	1.4301	0.07	1	2	0.045	0.015	17.0/19.5	–	8.0/10.5	–	0.11	–	Yes
X6CrNiTi18-10	1.4541	0.08	1	2	0.045	0.015	17.0/19.0	–	9.0/12.0	–	–	Ti 5xC/0.70	Yes
X6CrNiNb18-10	1.455	0.08	1	2	0.045	0.015	17.0/19.0	–	9.0/12.0	–	–	Nb 10xC/1.00	Yes
X2CrNiMo17-12-2	1.4404	0.03	1	2	0.045	0.015	16.5/18.5	2.0/2.5	10.0/13.0	–	0.11	–	Yes
X5CrNiMo17-12-2	1.4401	0.07	1	2	0.045	0.015	16.5/18.5	2.0/2.5	10.0/13.0	–	0.11	–	Yes
XCrNiMoTi17-12-2	1.4571	0.08	1	2	0.045	0.015	16.5/18.5	2.00/2.50	10.5/13.5	–	–	Ti 5xC/0.70	Yes
X2CrNiMo17-12-3	1.4432	0.03	1	2	0.045	0.015	16.5/18.5	2.50/3.00	10.5/13.0	–	0.11	–	Yes
X2CrNiMoN17-13-3	1.4429	0.03	1	2	0.045	0.015	16.5/18.5	2.50/3.00	11.0/14.0	–	0.12/0.22	–	Yes
X3CrNiMo17-13-3	1.4436	0.05	1	2	0.045	0.015	16.5/18.5	2.50/3.00	10.5/13.0	–	0.11	–	Yes
X2CrNiMo18-14-3	1.4435	0.03	1	2	0.045	0.015	17.0/19.0	2.50/3.00	12.5/15.0	–	0.11	–	Yes
X2CrNiMoN17-13-5	1.4439	0.03	1	2	0.04	0.015	16.5/18.5	4.00/5.00	12.5/14.5	–	0.12/0.22	–	Yes
X2CrNiMo18-15-4	1.4438	0.03	1	2	0.045	0.015	17.5/19.5	3.00/4.00	13.0/16.0	–	0.11	–	No
X1NiCrMoCu31-27-4	1.4563	0.02	0.7	2	0.03	0.01	26.0/28.0	3.00/4.00	30.0/32.0	0.70/1.50	0.11	–	No
X1CrNiMoCu25-20-5	1.4539	0.02	0.7	2	0.03	0.01	19.0/21.0	4.00/5.00	24.0/26.0	1.20/2.00	0.15	–	Yes
X1CrNiMoCuN20-18-7	1.4547	0.02	0.7	1	0.03	0.01	19.5/20.5	6.00/7.00	17.5/18.5	0.50/1.00	0.18/0.25	–	Yes
X1NiCrMoCuN25-20-7	1.4529	0.02	0.5	1	0.03	0.01	19.0/21.0	6.00/7.00	24.0/26.0	0.50/1.50	0.15/0.25	–	No

EN 10217-7 Mechanical Properties

		Tensile properties at RT					Impact properties
Steel grade		Proof Strength		Tensile strength	Elongation		Minimum average of 3 Charpy (J)
		Rp0.2	Rp1.0	Rm	A min (%)		at RT		at -sub-zero temperature1
Steel name	Steel number	MPa	MPa	MPa	long	trans	long	trans	trans
X2CrNi18-9	1.4307	180	215	470-670	40	35	100	60	60
X2CrNi19-11	1.4306	180	215	460-680	40	35	100	60	60
X2CrNiN18-10	1.4311	270	305	550-760	35	30	100	60	60
X5CrNi18-10	1.4301	195	230	500-700	40	35	100	60	60
X6CrNiTi18-10	1.4541	200	235	500-730	35	30	100	60	60
X6CrNiNb18-10	1.455	205	240	510-740	35	30	100	60	60
X2CrNiMo17-12-2	1.4404	190	225	490-690	40	30	100	60	60
X5CrNiMo17-12-2	1.4401	205	240	510-710	40	30	100	60	60
XCrNiMoTi17-12-2	1.4571	210	245	500-730	35	30	100	60	60
X2CrNiMo17-12-3	1.4432	190	225	490-690	40	30	100	60	60
X2CrNiMoN17-13-3	1.4429	295	330	580-800	35	30	100	60	60
X3CrNiMo17-13-3	1.4436	205	240	510-710	40	30	100	60	60
X2CrNiMo18-14-3	1.4435	190	225	490-690	40	30	100	60	60
X2CrNiMoN17-13-5	1.4439	285	315	580-800	35	30	100	60	60
X2CrNiMo18-15-4	1.4438	220	250	490-690	35	30	100	60	60
X1NiCrMoCu31-27-4	1.4563	215	245	500-750	40	35	120	90	60
X1CrNiMoCu25-20-5	1.4539	220	250	520-720	35	30	120	90	60
X1CrNiMoCuN20-18-7	1.4547	300	340	650-850	35	30	100	60	60
X1NiCrMoCuN25-20-7	1.4529	300	340	600-800	40	40	120	90	60

EN 10217-7 Common Steel Grades And Equivalent AISI Grades

Steel Name	Steel Number	AISI Grade
X2CrNi18-9	1.4307	304L
X5CrNi18-10	1.4301	304
X2CrNiMo17-12-2	1.4404	316L
X6CrNiTi18-10	1.4541	321
X6CrNiMoTi17-12-2	1.4571	316Ti
X2CrNiMo18-15-4	1.4438	317L
X2CrNiMoN22-5-3	1.4462	2205

What size is EN 10217 pipe?

EN 10217 pipes can range in diameter from 17.2 mm to 2020 mm, and have wall thicknesses up to 17.5 mm. Pipes with larger diameters may be made in multiple sections. 

Seamless pipe: Sizes range from 3.35 mm to 101.6 mm

Welded pipe: Sizes range from 5 mm to 1219.2 mm

Wall thickness: Ranges from 0.5 mm to 20 mm

Tolerance of EN 10217-7 Stainless Steel Pipe

The diameter and the wall thickness of the tubes shall be within the relevant tolerance limits given in Table 2.

Tolerance classes are according to EN 1SO 1127.

Table 2 Tolerance on outside diameter and on wall thickness of tubes

Outside Diameter D Mm	Tolerance On Outside Diameter D		Tolerance On Wall Thickness T
	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
	D4a	±  0,5 % Or ±  0,1 Mm Whichever Is The Greater
D >168,3	D2	±  1,0 %

EN 10217-7 Standard Delivery Conditions

Symbol	Type of delivery condition a	Surface condition
W0 b	Welded from hot or cold rolled plate, sheet or strip 1D, 2D, 2E, 2B	As welded
W1 b	Welded from hot rolled plate, sheet or strip 1D, descaled	Metallically clean
W1A b	Welded from hot rolled plate, sheet or strip 1D, heat treated, descaled	Metallically clean
W1R b	Welded from hot rolled plate, sheet or strip 1D, bright annealed.	Metallically bright
W2 b	Welded from cold rolled plate, sheet or strip 2D, 2E, 2B, descaled	Metallically clean
W2A b	Welded from cold rolled plate, sheet or strip 2D, 2E, 2B, heat treated, descaled	Except for the weld, essentially smoother than for types W1 and W1A
W2R b	Welded from cold rolled plate, sheet or strip 2D, 2E, 2B, bright annealed	Metallically bright
WCA	Welded from hot rolled or cold rolled plate, sheet or strip 1D, 2D, 2E, 2B, heat treated if appropriate, at least 20 % cold formed, heat treated, with re-crystallized weld metal, descaled	Metallically clean, weld scarcely recognizable
WCR	Welded from hot rolled or cold rolled plate, sheet or strip 1D, 2D, 2E, 2B, heat treated if appropriate, at least 20 % cold formed, bright annealed, with re-crystallized weld metal	Metallically bright, weld scarcely recognizable
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

Symbols of flat products according to EN 10088-2.For tubes ordered with smoothed welds (“bead worked”) letter “b” shall be appended to the symbol of the type of the condition (e. g. W2Ab).Conditions W2, W2A, W2R, WCA or WCR are usually used as the starting condition.It should be indicated in the enquiry and order whether grinding or polishing is to be performed internally or externally, or internally and externally.

Testing And Inspection On EN 10217-7 Welded Pipe & Tube

All the inspection and testing finished on welded tubes, 3.1 type Mill Test Certificate should be provided according to EN 10204, The quality control department guarantees tubes high quality and good performance in various applications.

- Tensile test

- Flattening test

- Leak tightness test

- Dimensional inspection

- Visual examination

- Eddy current

- Ultrasonic test

- Radiographic test

What is the most expensive grade of stainless steel?

The most expensive grade of stainless steel is typically 904L stainless steel. This high-grade alloy is known for its exceptional corrosion resistance, particularly in harsh environments such as those containing sulfuric acid, chlorides, and other aggressive chemicals. It contains high levels of chromium, nickel, molybdenum, and copper, which contribute to its superior performance.

Key Features of 904L Stainless Steel:

Corrosion Resistance: Excellent resistance to pitting, crevice corrosion, and stress corrosion cracking.

Strength: High tensile strength and durability.

Cost: Due to its high nickel and molybdenum content, 904L is significantly more expensive than other stainless steel grades like 304 or 316.

Applications:

- Chemical processing equipment

- Pharmaceutical industries

- Offshore oil and gas industries

- High-end luxury watches (e.g., Rolex uses 904L for some of its watch cases)

You can get an offer for products in below material forms:

-Pipe and Tube (EN 10216-5, ASTM A213, ASTM A249, A312, A790,)

-Forged Fitting and Flange (ASTM A182 , ASTM A105,ASTM B564 )

-Butt Weld Fittings (ASTM A234, ASTM A403,ASTM A815)

-Round bar , Billet (ASTM A276, ASTM A479)

- Plate, Sheet, Strip(ASTM A240, EN 10028-7, A480)

-Bolting, Nuts（ASTM A193, A194, A320）

EN 10217-7 Stainless Steel Pipe Exported Countries

We Export EN 10217-7 Stainless Steel Pipe to Saudi Arabia, United Arab Emirates, Qatar, Bahrain, Oman, Kuwait, Turkey, Egypt, Yemen , Syria, Jordan, Cyprus, Singapore, Malaysia, Indonesia, Thailand, Vietnam, South Korea, Japan, Sri Lanka, Maldives, Bangladesh, Cambodia, Argentina, Bolivia, Brazil, Venezuela, Colombia, Ecuador, Guyana, Paraguay, Uruguay, United States Of America, Canada, Mexico, Panama, Jamaica, Bahamas, Denmark, Norway, Germany, France,Italy, United Kingdom, Spain, Belgium, Greece, Czech Republic, Portugal, Hungary, Albania, Austria, Finland, Ireland, Croatia, Malta, Nigeria, Algeria, Angola, South Africa, Libya, Egypt, Sudan,  Europe, Africa, Asia, North America, South America, Middle East.etc