Product Made In Japan
Manufacturer: IHARA SCIENCE CORPORATION
Model: On-Site Flange

Features

The 『Ｏn-Site Fｌａｎｇｅ』 enables piping connections without welding. By utilizing a dedicated tightening device onsite, even individuals without specialized skills can easily and reliably set up connections. No welding work allows
for quick performance of piping maintenance tasks. This product achieves welding-equivalent strength by swaging the sleeve onto the piping. Pre-welding fire prevention measures are unnecessary, and processes like post-weld acid washing are not required. This significantly reduces downtime for facility operation and facilitates easy recovery during troubleshooting.

+ Sleeve securely swages onto the pipe 

Pressure testing on Sch160 pipe under more than 140MPa
No leak！ No pull-out！ No abnormality！

+Significant reduction in piping man-hours ! 

Basic Specifications

【1. Specifications】

Rated pressure	21MPa ※
Size	15mm (1/2″) ～ 50mm (2″)
Temperature	-20℃ ～ 90℃ (O-ring: NBR)
Material	Carbon/Stainless steel
Fluid	Hydraulic oil, Water

※ Please contact us if you require specifications above the rated pressure.

2. Primary Materials

Number	Parts name	Material
①	Flange	SS400 equivalent / SUS304 equivalent
②	Brim	C45E4 / SUS304
③	Sleeve	Carbon steel / SUS316
④	O-ring	NBR
Ref.	⑤ Hex cup bolt	SCM435 / SUS304 equivalent
Ref.	⑥ Washer	Carbon steel / SUS304 equivalent
Ref.	⑦ Hex nut	Carbon steel / SUS304 equivalent

【3.Applicable pipe standards (for reference)】

(1) JIS G 3454 Carbon steel pipes for general service: STPG 370
(2) JIS G 3455 Carbon steel pipes for high pressure service: STS 370
(3) JIS G 3456 Carbon steel pipes for high temperature service: STPT 370
(4)SUS 304TP and SUS 316TP specified in stainless steel piping for JIS 3459 piping

Table On-Site Flange Applicable pipe outer diameter dimensions and tolerances※

Nominal		pipe outer dia (/) (mm)	tolerances
A	B
15mm	(1/2″)	21.7	± 0.3 mm
20mm	(3/4″)	27.2	± 0.3 mm
25mm	(1″)	34	± 0.3 mm
32mm	(1 • 1/4″)	42.7	±0.8%
40mm	(1 • 1/2″)	48.6	±0.8%
50mm	(2″)	60.5	± 0.3 mm

Tolerances are in accordance with JIS G3454 Outer Diameter Tolerances for Cold-Finished Seamless Steel Pipes.
However, 50mm (2”) alone has strict allowable tolerances.

 OSF‐SA・OSF‐SB Dimension Table

Unit: mm

Nominal Size	Pipe Size	A	A(min)	A(max)	B	C	d1	d2	d3	d4	d5	L1	L2	O ring	Ref.
															Bolt
OSF-SA-15 /OSF-SB-15	15A (1/2B)	54	53	58	36	22	40	16	30	22.3	11	19	30.4	G25	MIO
OSF-SA-20 /OSF-SB-20	20A (3/4B)	58	57	62	40	22	45	20	35	27.8	11	19	29.7	G30	MIO
OSF-SA-25 / OSF-SB-25	25A (IB)	68	67	73	48	28	55	25	40	34.6	13	23	36.4	G35	M12
OSF-SA-32 /OSF-SB-32	32A (1 • 1/4B)	76	73.5	81	56	28	65	31.5	45	43.3	13	31	47.7	G40	M12
OSF-SA-40 / OSF-SB-40	40A (1 • 1/2B)	92	88.5	98	65	36	72	37.5	55	49.2	18	31	47.7	G50	M16
OSF-SA-50 / OSF-SB-50	50A (2B)	100	98	106	73	36	84	47.5	65	61	18	37.5	60	G60	M16

 OSF‐HA・OSF‐HB Dimension Table

Nominal Size	Pipe Size	A	A(min)	A(max)	B	C	dl	d2	d3	d4	d5	LI	(L2)	0 ring	Ref.
															Bolt
OSF-HA-15 / OSF-HB-15	15A (1/2B)	63	62	67	40	22	40	16	30	22.3	11	19	30.4	G25	MIO
OSF-HA-20 / OSF-HB-20	20A (3/4B)	68	67	72	45	22	45	20	35	27.8	11	19	29.7	G30	MIO
OSF-HA-25 /OSF-HB-25	25A (IB)	80	78.5	85	53	28	55	25	40	34.6	13	23	36.4	G35	M12
OSF-HA-32 /OSF-HB-32	32A (1 • 1/4B)	90	88.5	95	63	28	65	31.5	45	43.3	13	31	47.7	G40	M12
OSF-HA-40 / OSF-HB-40	40A (1 • 1/2B)	100	98	106	70	36	72	37.5	55	49.2	18	31	47.7	G50	M16
OSF-HA-50 / OSF-HB-50	50A (2B)	112	108	118	80	36	84	47.5	65	61	18	37.5	60	G60	M16

Swaging jigs and procedures for sizes 15A（1/2B）and 20A（3/4B）

Swaging jigs and procedures for sizes 5A（1/2B）〜50A（2B)