EN1092-1 Type 11 Weld Neck Flange Order

On 19th ,July, 2024. Mr Sarkis from Sakr Power Systems S.A.L. in Lebanon sent us an inquiry for EN1092-1 Type 11 weld neck flange.

FL.W/N EN 1092-1/ 11/ B1 PN16/FL,DN25,RF, CARBONSTEEL, 90 PIECES

At 15th, August. He informed us the order has been awarded successfully by the end users, and required us to start producing immediately.

Item	QTY	ND	Pressure Class	DESCRIPTION	Port 1 Connection Type	Port 2 Connection Type	Material	Quantity	Unit
Code
200359601182	90	25	16	FL.W/N EN 1092-1/ 11/ B1 PN16/FL	BV	FL, RF	Carbon Steel	90	EA

 

EN 1092-1 Weld Neck Flange Specification

The EN 1092-1 Type 11 Weld Neck Flange is a versatile and robust flange type that is used in a wide range of industrial applications where high pressure, high temperature, and strong mechanical integrity are required. The unique design of the weld neck flange, with its tapered neck that is welded to the pipe, provides a strong connection that can handle substantial stresses without compromising the integrity of the system.

Standard	EN 1092-1 European Standard
Manufacturing Process	Hot Forging / Steel Casting / Hot Rolled / Plate Machining
Outer Diameter	DN 15 to DN 4000
Pressure Class	PN 2.5, PN 6, PN 8, PN 10, PN 16, PN 25, PN 40, PN 63, PN 100 etc
Flanges Facing	Type Flat Face (FF), Type B Raised Face (RF), Type C Tongue, Type D Groove, Type E Spigot, Type F Recess, Type G O-ring Spigot, Type H O-ring Groove,

 

EN 1092-1 Type 11 Flanges Facing Types

NOTE 1

The transition from the edge of the raised face to the flange face may be by radius or chamfer for types B, D, F and G only (see 5.7.1).

NOTE 2

B1 and B2 are raised face (type B) for different applications (see 5.7.2.2, 5.7.2.3 and Table 2).

NOTE 3

For the dimensions of flange facings, see Figure 4 and Table 8.

 

Dimensions of EN 1092-1 Weld Neck Flange Type11 PN16

The specifications of weld neck flanges are mainly applicable to sizes ranging from DN10 to DN4000. The production standard is EN 1092-1. The following figure shows the sizes DN10-DN350 under some PN16.

Dimensions of  Type11 PN16

DN	Mating dimensions					Outside diameter of neck	Flange thickness				Length						Neck diameters
	Outside diameter	Diameter of bolt circle	Diameter of bolt hole	Bolting
	D	K	L	Number	Size	A	C1	C2	C3	C4	H1	H2	H3	H4		H5	N1	N2	N3
	01, 02, 04, 05, 11, 12, 13, 21					11      21 a      34 d 35 – 37	01 02 04	11 12 13	21	05	12 13	11 34 c,d	11 34 c,d	35	36	37	11 34 c, d	12 13	21
10	90	60	14	4	M12	172	14	16	16	16	22	35	6	35	35	7	28	30	28
15	95	65	14	4	M12	213	14	16	16	16	22	38	6	38	38	7	32	35	32
20	105	75	14	4	M12	269	16	18	18	18	26	40	6	40	40	8	40	45	40
25	115	85	14	4	M12	337	16	18	18	18	28	40	6	40	40	10	46	52	50
32	140	100	18	4	M16	424	18	18	18	18	30	42	6	42	42	12	56	60	60
40	150	110	18	4	M16	483	18	18	18	18	32	45	7	45	45	15	64	70	70
50	165	125	18	4	M16	603	20	18	18	18	28	45	8	45	45	20	74	84	84
65	185	145	18	8b	M16	761	20	18	18	18	32	45	10	45	45	20	92	104	104
80	200	160	18	8	M16	889	20	20	20	20	34	50	10	50	50	25	105	118	120
100	220	180	18	8	M16	1,143	22	20	20	20	40	52	12	52	52	25	131	140	140

How to inspect EN1092-1 Type 11 Weld Neck Flange

Inspecting an EN 1092-1 Type 11 Weld Neck Flange is a crucial step to ensure its integrity, quality, and compliance with required standards before it is installed in a piping system.

Visual Inspection

External and Internal Surface: Check both the external and internal surfaces of the flange for visible cracks, pits, dents, or any other damage. Surface defects can affect the sealing and structural integrity.

Dimensional Inspection

Outside diameter (OD): The overall outer diameter of the flange should match the specified size.

Bolt circle diameter (BCD): Measure the distance between the centers of bolt holes to ensure it matches the design specification.

Flange thickness: Measure the thickness of the flange at different points (such as near the bolt holes and at the raised face) to ensure it complies with the required dimensions.

Bolt Hole Size: Ensure the bolt holes are of the correct size and spacing, and verify the alignment of the holes to ensure the bolts will fit properly.

 

Applications

– Piping Systems

– Pressure Vessels

– Boilers, Heat Exchangers

– Oil & Gas, Chemical Industry