Stainless Steel PN10 Plate Flanges

In industrial piping systems, selecting the appropriate flange is critical for safety and efficiency. Stainless steel PN10 plate flanges serve as key connecting components, balancing pressure resistance with corrosion resistance. Compliant with EN 1092-1 standards, these flanges maintain uniform dimensions and performance. By selecting materials such as SS304, SS316, or SS316L based on operating environments, and combining them with appropriate sealing face types and precise dimensions, PN10 plate flanges serve as reliable connection components across diverse industrial applications.

What Is Plate Flange?

A plate flange is essentially a flat disc or ring with bolt holes machined around its circumference, designed to be connected to pipes, vessels, or equipment components via welding or other methods. EN 1092-1 PN10 plate flanges are designed for a nominal pressure of 10 bar in metric systems and features a flat-face configuration rather than a socket-weld or weld-neck design.

EN 1092-1 Plate Flange Specification

EN 1092-1 standard defines pressure ratings like PN6, PN10, PN16, PN25, PN40 (in bars),etc, and specifies key dimensions such as outer diameter, bolt circle, bolt holes, and thickness.Materials include carbon steel, stainless steel, and alloy steel, chosen based on operating conditions.

In the EN 1092-1 standard, the Plate Flange is defined as a Type 01 flange, commonly referred to as a “slip-on flange” or “plate flange.” This flange features a simple design and is suitable for low to medium pressure piping systems.

PN10 Pressure Rating Explained

When you see the term PN10 Plate Flanges, the “PN10” part refers to the nominal pressure rating in the PN system (Pressure Nominal). In metric-based European standards, PN10 means the nominal static pressure rating is 10 bar.

What PN10 Means in Bar and PSI

In bar units: PN10 means 10 bar nominal pressure.

In psi units: since 1 bar ≈ 14.5038 psi, 10 bar ≈ 145 psi.

Comparison with Other PN Ratings

PN Rating	Max Pressure (bar)	Max Pressure (psi)	Typical Use Case
PN6	6	87	Light-duty pipelines, low pressure
PN10	10	145	Water supply, HVAC, medium-low pressure systems
PN16	16	232	Medium-pressure pipelines
PN25	25	362	High-pressure industrial pipelines
PN40	40	580	Heavy-duty industrial applications
PN63	63	914	Very high-pressure systems

ASTM A182 Materials

For stainless steel flanges, a key material standard is ASTM A182 (also designated A182M) which covers forged or rolled alloy-steel and stainless-steel pipe flanges, forged fittings, valves and parts for high-temperature service.

Common Grades for Flanges: SS304, SS316, SS316L,SS904L

•SS304 (ASTM A182 F304) — a general-purpose austenitic stainless steel.

•SS316 (ASTM A182 F316) — adds molybdenum, offering better corrosion resistance, especially in chloride environments.

•SS316L (ASTM A182 F316L) — low-carbon version of 316, better for welded applications to avoid carbide precipitation.

•SS904L (ASTM A182 F904L) — a high-alloy austenitic stainless steel.

ASTM A182 Chemical Composition

CHEMICAL	LIMITS	C	Mn	P	S	Si	Ni	Cr	Mo	N	Cu
ASTM A182 F304	MIN						8.0	18.0
	MAX	0.08	2.00	0.045	0.030	1.00	11.0	20.0		0.10
ASTM A182 F316	MIN						10.0	16.0	2.00
	MAX	0.08	2.00	0.045	0.030	1.00	14.0	18.0	3.00	0.10
ASTM A182 F316L	MIN						10.00	16.0	2.00
	MAX	0.03	2.00	0.045	0.030	1.00	15.00	18.0	3.00	0.10
ASTM A182 F904L  (N08904)	MIN						23.00	19.00	4.00		1.00
	MAX	0.02	2.00	0.040	0.030	1.00	28.00	23.00	5.00	0.10

ASTM A182 Mechanical Properties

MATERIAL	ASTM A182 F304	ASTM A182 F316	ASTM A182 F316L	ASTM A182 F904L
T.S (MPA)	515 min	515 min	485 min	490 min
Y.S (MPA)	205 min	205 min	170 min	215 min
EL %	30 min	30 min	30 min	35 min
R/A %	50 min	50 min	50 min	–

PN10 Type 01 Flange Dimension

DN	Mating dimensions					Bore diameters	Flange thickness
	Outside diameter D	Diameter of bolt circle    K	Diameter of bolt hole L	Bolting
				Number	Size	B₁	C₁
10	90	60	14	4	M12	18.0	14
15	95	65	14	4	M12	22.0	14
20	105	75	14	4	M12	27.5	16
25	115	85	14	4	M12	34.5	16
32	140	100	18	4	M16	43.5	18
40	150	110	18	4	M16	49.5	18
50	165	125	18	4	M16	61.5	20
65	185	145	18	8d	M16	77.5	20
80	200	160	18	8	M16	90.5	20
100	220	180	18	8	M16	116.0	22
125	250	210	18	8	M16	141.5	22
150	285	240	22	8	M20	170.5	24
200	340	295	22	8	M20	221.5	24
250	395	350	22	12	M20	276.5	26
300	445	400	22	12	M20	327.5	26
350	505	460	22	16	M20	359.5	30
400	565	515	26	16	M24	411.0	32
450	615	565	26	20	M24	462.0	36
500	670	620	26	20	M24	513.5	38
600	780	725	30	20	M27	616.5	42
700	895	840	30	24	M27	b	50
800	1015	950	33	24	M30		56
900	1115	1050	33	28	M30		62
1000	1230	1160	36	28	M33		70
1200	1455	1380	39	32	M36		83
1400	1675	1590	42	36	M39	一	b
1600	1915	1820	48	40	M45	一
1800	2115	2020	48	44	M45	一
2000	2325	2230	48	48	M45	一	b
2200	2550	2440	56	52	M52	一
2400	2760	2650	56	56	M52	一
2600	2960	2850	56	60	M52	一
2800	3180	3070	56	64	M52	一
3000	3405	3290	62	68	M56	一
b To be specified by the purchaser.

If you’d like to learn about other sizes for the Type 01 flange, click the link below.

https://www.zzflange.com/category/en-1092-1-dimension/type-01

Flange Face

The critical detail of a flange is its flange face—the machined surface that contacts the gasket or mates with another flange. The type of flange face affects sealing performance, compatibility, and installation conditions.

Flange Face Types

Flange Face Types	Description
Raised Face (RF)	Slightly elevated ring around the bore, creating a focused sealing surface.
Flat Face (FF)	Completely level surface, ensuring full gasket contact.
Ring-type Joint (RTJ)	Recessed groove for metal ring gasket, ideal for high-pressure applications.
Tongue and Groove (T&G)	Matching raised and recessed surfaces for alignment.
Male and Female (M&F)	Similar to T&G but differs in size and intended use.

Raised Face (RF) vs Flat Face (FF)

Feature	Raised Face (RF)	Flat Face (FF)
Surface Structure	Slightly raised around the bore	Completely level
Sealing Performance	High	Moderate
Applicable Pressure	Medium to high	Low to medium
Gasket Compatibility	Metal, spiral wound, rubber, graphite	Soft gaskets (rubber, non-metal)
Typical Applications	Steel piping, high-pressure industrial systems	Cast iron, low-pressure pipelines, water systems

Manufacturing Process

•Forging and Casting Methods

•Machining and Drilling Processes

•Heat Treatment and Stress Relieving

FAQ

What is the Difference Between Plate and Slip On Flanges?

A plate flange is a flat, circular disc welded to a pipe end to facilitate bolting to another pipe. Also known as a flat flange or plain flange, it is typically used in fuel and water pipelines, where two such flanges are joined with a gasket in between.

A slip on flange, commonly referred to as an SO flange, is designed to slide over the pipe’s exterior. It offers easier alignment than most other flange types but is suitable only for low-pressure applications due to its limited vibration and shock resistance.

24 10 月, 2025