Stainless Stell SAE Flanges

admin — Wed, 14 Sep 2022 10:48:33 +0000

SAE Flanges are designed to provide an alternative method of connecting a pipe, hose, tube or equipment. The leak free connection is suitable for high pressures, larger sizes and assembly in tight quarters. It has achieved worldwide standard acceptance.

It is made from normalized forging and the basic raw material is steel with carbon content lower than 0.30%. Alternatively, stainless steel SS316 or galvanized flange material is available. The complete set flange combine of flat face, oring face, oring groove, 4 washers and cap screws.

Size	3/8” to 5”
Material	Carbon Steel ST52.3/S355 Stainless Steel SS316L
Series	3000 6000
Connection Type	Threaded NPT Threaded BSPP Socket Weld (Weld in) Butt Weld (Weld on)
Configuration	SAE Flanges Split Flange Flange Adaptor SAE Blind Flange

What are Hydraulic SAE Flanges

1. What are hydraulic SAE flanges use for?

The 4-bolt hydraulic sae flange connection conforms to SAE J518 and ISO 6162 standards. The flange has through holes for the mounting bolts and it has UNC or metric thread. The mounting holes of flat face are tapped while oring face doesn’t include.

There are various bolt grades that are paired to install in equipment:

Bolt grade 8.8: Yellow zinc as standard material supplied with carbon steel flange.
Bolt grade 10.9: FIZn 240h L suitable for high temperature application, available upon request.
Bolt grade SS304: Standard material supplied with stainless steel flange.
Bolt grade SS316: Higher corrosion resistance, available upon request.

2. What type of O-rings are used for hydraulic flanges?

It is a static face seal which uses a high durometer O-ring for the flange sealing. Metal-to-metal contacts at the outer face of the flange will cause leakage. Therefore, the O-ring sealing is compressed between the flat face and O-ring face providing a reliable soft sealing. Flanges use an O-ring to seal a joint and contain pressurized fluid.

O-Ring Side SAE Flange

The seals of flanges are available in the following materials:

Description	NBR 70/90	Viton 90
Equivalent	BUNA-N	FKM
Temperature Range (°C)	-34°C to 121°C	-26°C to 205°C
Recommended Application	Petroleum pols and fluids Cold Water Diesel fuel and fuel oils Mineral oil and grease Vegetable oil Silicone oil and grease	Petroleum pols and fluids Cold Water Silicone greases and oils Aromatic hydrocarbons Aliphatic hydrocarbons Fuels with methanol content
Non Recommended Application	Aromatic hydrocarbons Phosphate ester fluids Strong acids Automotive brake fluid	Ammonia gas, amines, alkalis Low molecular organism acids Superheated steam Glycol based brake fluids

3. What is the difference between code 61 and 62 flanges?

SAE Flange is designed in two difference code design and it is code 61 and 62. The summary table as per below:

Description	Code 61	Code 62
Series	3000	6000
Size	3/8” to 5”	3/8” to 3”
Working Pressure (bar)	34 to 345	414

4. How are SAE flanges attached to pipe?

Hydraulic SAE flange provides a zero-clearance assembly that enables easy connection, disconnect and maintenance of tube to hose, tube to tube or manifold connection. Infinite positioning is a built-in feature to enable flange to put in different position angle. There are several types of connection: threaded end (NPT or BSPP) and welding end (socket weld or butt weld).

The connection of welding and threaded is able to maximize reliability. However, it is inevitable that connections must be removed to allow replacing or servicing on system components. To improve flanges productivity, flanges have advanced considerably before installation to improve performance, installation convenience but still remain overall function effectiveness and efficiency.

5. What is the purpose of a SAE flange?

A simple SAE flange installation design provides several advantages:

Ability to connect pipe size up to 5 inch.
Single seal point between pipe or system assembly.
Much lower tightening torque required from the four bolts compared to other types of flange with equivalent size
Ease of disassembly through use of split flange.

6. How do you install a SAE flange?

There are 4 simple steps to install SAE flange?

Step 1: Check components surface and ensure there are no damage or contamination.

Step 2: Align the flange connection before inserting the O-ring seal on the female flange groove. Place the washer with cap screws and bolt through the bolt holes.

Step 3: Hand tighten cap screws to seat O-ring on flange groove.

Step 4: Ensure the tighten process meets the torque value below:

Flange Size	Screw Thread	Screw Torque (NM)*
1/2″	M8	32
3/4″	M10	70
1″	M10	70
1 1/4″	M10	70
1 1/2″	M12	130
2″	M12	130
2 1/2″	M12	130
3″	M16	295
3 1/2″	M16	295
4″	M16	295
5″	M16	295

Flange recommended Torque Value Table Series 3000 Code 61

Flange Size	Screw Thread	Screw Torque (NM)*
1/2″	M8	32
3/4″	M10	70
1″	M12	130
1 1/4″	M12	130
1 1/2″	M16	295
2″	M20	550
2 1/2″	M24	550
3″	M30	650

Flange recommended Torque Value Table Series 6000 Code 62

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Stainless Stell SAE Flanges