DIN2545 PN40 Flat Flange For Welding (Slip On)

DIN 2545 PN40 Flat Flanges for Welding (Slip-On) Manufacturer & Supplier

[We area trusted DIN 2545 PN40 flange manufacturer, supplier, and exporter, producing high-quality flat slip-on flanges for welding in carbon steel, stainless steel, and alloy steel. Our products meet DIN / EN standards with precise machining, reliable sealing surfaces, and excellent pressure resistance for high-pressure piping systems.

What is DIN 2545 PN40 Flat Flange for Welding?

The DIN 2545 standard specifies flat slip-on welding flanges with a PN 40 pressure rating (40 bar at 20°C). These flanges are designed to slip over the pipe end and be welded both inside and outside, creating a secure, leak-proof connection for high-pressure applications.

• Type: Slip-On Welding Flat Flange
• Pressure Class: PN 40
• Size Range: DN 10 to DN 500 (larger sizes on request)
• Facing Types: Form A (Flat Face), Form B (Raised Face)
• Welding: Double fillet welds (inside + outside)

DIN 2545 PN40 Flange Material Grades

Carbon Steel:

• C22.8 (1.0460)
• P245GH, P250GH

Alloy Steel:

• 16Mo3, 13CrMo4-5, 10CrMo9-10

Stainless Steel:

• 1.4301 (AISI 304)
• 1.4404 (AISI 316L)
• 1.4571 (AISI 316Ti)

Non-Ferrous Alloys:

• CuNi 90/10, CuNi 70/30 (marine service)

Advantages of DIN 2545 PN40 Slip-On Flanges

• High pressure capacity (PN 40 / 580 psi)
• Easier alignment than weld-neck flanges
• Lower installation cost
• Suitable for a wide range of media (water, steam, oil, gas, chemicals)
• Available in corrosion-resistant materials for marine and offshore use

Dimension and Weight of DIN2545 PN40 Flat/Plate/Slip On Flange

Download DIN2545 PN40 flange dimension and weight

Rated Diameter	O.D. of Pipe		Flange Dimension					Screw Dimension		Approx. Flange Weight
DN	ISO	DIN	d4	D	t	f	K	No. of Holes	d2	KG/PCS
10	17.2	14	40	90	–	2	60	4	14	0.72
15	21.3	20	45	95	16	2	65	4	14	0.81
20	26.9	25	58	105	18	2	75	4	14	1.24
25	33.7	30	68	115	18	2	85	4	14	1.38
32	42.4	38	78	140	18	2	100	4	18	2.03
40	48.3	44.5	88	150	18	3	110	4	18	2.35
50	60.3	57	102	165	20	3	125	4	18	3.2
65	76.1	–	122	185	22	3	145	4	18	4.29
80	88.9	–	138	200	24	3	160	8	18	5.88
100	114.3	108	162	235	24	3	190	8	23	7.54
125	139.7	133	188	270	26	3	220	8	27	10.8
150	168.3	159	218	300	28	3	250	8	27	14.5
175	193.7	191	260	350	32	3	295	12	30	22.1
200	219.1	216	285	375	34	3	320	12	30	27.2
250	273	267	345	450	38	3	385	12	33	43.8
300	323.9	318	410	515	42	4	450	16	33	63.3
350	355.6	368	465	580	46	4	510	16	36	89.5
400	406.4	419	535	660	50	4	585	16	39	127
500	508	521	615	755	52	4	670	20	42	172

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DIN 2545 PN40 Flat Flange For Welding (Slip On)