Product Introduction

The BS Plate Flange, designed for welding, is a pipe connection component manufactured in accordance with BS4504 standards. It is forged or cut from steel plate to create a reliable and leak-proof joint between pipes, valves, pumps, and other equipment. The BS Plate Flange features a simple yet robust design, making it a versatile solution for a wide array of piping systems. Its primary function is to provide easy access for cleaning, inspection, or modification, as bolted flange connections can be assembled and disassembled without extensive cutting or welding. By offering a standardized and secure method of connection, the BS Plate Flange contributes directly to reducing on-site installation time and simplifying future maintenance procedures, offering tangible long-term value.

Product Parameters

Item	Specification
Brand Name	HAIHAO
Execution Standard	BS4504
Type/Model Forged	Plate Flange
Specification	DN10 - DN4000
Pressure Rating	PN2.5 - PN250
Connection Type	Butt-welding, Bolted connection
Surface Treatment	Rust preventive oil, Hot-dip galvanizing, Sandblasting, Acid washing
Material	Q235; S235JR, S355JR, S355J0, ST37.2, 304, 316L
Packaging	Wooden crate or pallets
Supply Capacity	2000 tons/month

Technical Diagram

BS4504 TABLE 16/3
STEEL PLATE FLANGES FOR WELDING 16 bar

product-972-383

Nom.size	Pipe o.d. d₁	Flange		Raised face		Bolting	Drilling
Nom.size	Pipe o.d. d₁	D	b	d₄	f	Bolting	No.	d₂	k
10	17.2	90	14	40	2	M12	4	14	60
15	21.3	95	14	45	2	M12	4	14	65
20	26.9	105	16	58	2	M12	4	14	75
25	33.7	115	16	68	2	M12	4	14	85
32	42.4	140	16	78	2	M16	4	18	100
40	48.3	150	16	88	3	M16	4	18	110
50	60.3	165	18	102	3	M16	4	18	125
65	76.1	185	18	122	3	M16	4	18	145
80	88.9	200	20	138	3	M16	8	18	160
100	114.3	220	20	158	3	M16	8	18	180
125	139.7	250	22	188	3	M16	8	18	210
150	168.3	285	22	212	3	M20	8	22	240
175	193.7	315	24	242	3	M20	8	22	270
200	219.1	340	24	268	3	M20	12	22	295
250	273	405	26	320	3	M24	12	26	355
300	323.9	460	28	378	4	M24	12	26	410
350	355.6	520	32	438	4	M24	16	26	470
400	406.4	580	36	490	4	M27	16	30	525
450	457.2	640	40	550	4	M27	20	30	585
500	508	715	44	610	4	M30	20	33	650
600	609.6	840	52	725	5	M33	20	36	770
700	711.2	910	58	795	5	M33	24	36	840
800	812.8	1025	64	900	5	M36	24	39	950
900	914.4	1125	72	1000	5	M36	28	39	1050
1000	1016	1255	78	1115	5	M39	28	42	1170
1200	1220	1485	94	1330	5	M45	32	48	1390

Product Advantages

1.Adapts to Various Conditions, Simplifies Spare Parts Inventory: With material choices from carbon steel to stainless steel and pressure ratings covering low to high demands, one flange series can meet multiple process line requirements within a facility. Using a consistent standard helps streamline spare parts management.

2.Lowers Maintenance and Replacement Expenses: The bolted connection allows for straightforward isolation, repair, or replacement of equipment without extensive cutting and re-welding. This approach reduces system downtime during maintenance.

Main Applications

Boiler and turbine piping systems in power plants
Oil and natural gas transmission pipelines
Building water supply, drainage, and fire protection systems
General mechanical equipment and piping connections

FAQ

Q1: What is the main difference between a BS4504 plate flange and an American standard flange (like ANSI B16.5)?

A1: The main difference is the dimensional standard. BS4504 is commonly used in Europe, and its key dimensions-such as flange outer diameter, bolt circle diameter, number of bolt holes, and hole size-do not match those of ANSI flanges. It is important to confirm which standard is required during project design and material procurement.

Q2: How do I select the right flange material for my application?

A2: Material choice depends on the corrosiveness of the fluid, the operating temperature, and the pressure. For general services like water, air, steam, or oil, carbon steel (e.g., Q235, S355JR) is a common option. For corrosive environments or where product purity is a concern, stainless steel grades like 304 or 316L are typically used. Consulting a corrosion resistance guide or a material specialist is recommended for specific cases.

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