FL FS FHS SAE Split Flange Clamp

SAE split hydraulic flange clamps are engineered to deliver reliable performance in a wide range of hydraulic applications, offering exceptional versatility and durability. Designed to accommodate both braided hoses and spiral hoses, these clamps provide a secure, leak-resistant connection, ensuring efficient fluid transfer in even the most demanding operating conditions.

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SAE split hydraulic flange clamps are engineered to deliver reliable performance in a wide range of hydraulic applications, offering exceptional versatility and durability. Designed to accommodate both braided hoses and spiral hoses, these clamps provide a secure, leak-resistant connection, ensuring efficient fluid transfer in even the most demanding operating conditions.

One of the key strengths of these flange clamps lies in their material flexibility. Available in various materials tailored to specific working environments, they can adapt to diverse conditions—from high-pressure industrial settings to corrosive or extreme temperature scenarios—ensuring long-term functionality and compatibility with the application’s unique requirements.

SAE split hydraulic flange clamps find extensive use across numerous industries, including agriculture, construction, coal mining, general machinery, garden equipment, automotive, and petroleum. Their robust design makes them suitable for heavy-duty machinery, mobile hydraulic systems, and stationary industrial setups, where consistent performance and reliability are critical.

Committed to uncompromising quality, our SAE split hydraulic flange clamps match the high standards of leading brands like Swagelok and Parker. We have a proven track record of manufacturing tube fittings that serve as effective replacements for Swagelok and Parker products, providing customers with a cost-effective alternative without sacrificing performance, precision, or durability.

In summary, SAE split hydraulic flange clamps combine versatility in hose compatibility, material adaptability, and industry-leading quality, making them an ideal choice for professionals seeking reliable, high-performance hydraulic connection solutions across a broad spectrum of applications.

Specification

PART NO.	FLANGE SIZE	DIMENSIONS						BOLT	Mpa
PART NO.	FLANGE SIZE	A	B	d	h	M	N	BOLT	Mpa
3000 PSI
FL-08	1/2"	54	45.6	9	6.2	38.1	17.5	M8X25	34.5
FL-12	3/4"	65	51.8	11	6.2	47.6	22.2	M10X30
FL-16	1"	70	58.4	11	7.5	52.4	26.2	M10X30
FL-20	1.1/4"	79	72.6	11	7.5	58.7	30.2	M10X30	27.6
FL-24	1.1/2"	94	82.2	13.5	7.5	69.9	35.7	M12X35	20.7
FL-32	2"	102	96.4	13.5	9	77.8	42.9	M12X35	20.7
FL-40	2.1/2"	114	108.2	13.5	9	88.9	50.8	M12X40	17.2
FL-48	3''	135	130.6	17.5	9	106.4	61.9	M16X50	13.8
6000 PSI
FS-08	1/2''	56	47.2	9	7.2	40.5	18.2	M8X30	42
FS-12	3/4''	71	60	11	8.2	50.8	23.8	M10X35	42
FS-16	1''	81	69.9	13.5	9	57.2	27.8	M12X45	42
FS-20	1.1/4''	95	77.2	13.5	9.8	66.6	31.8	M12X45	42
FS-24	1.1/2''	113	95	17.5	12	79.3	36.5	M16X55	42
FS-32	2''	133	113.8	22	12	96.8	44.5	M20X70	42
Note: Bolt should be ordered another.

The FL, FS, and FHS series SAE split flange clamps are engineered for heavy-duty hydraulic piping systems requiring flexible installation in confined spaces. Designed in strict accordance with SAE J518 and ISO 6162 standards, these two-piece split flange halving clamps allow easy assembly and maintenance without disconnecting or cutting existing hydraulic lines. They provide a high-pressure, leak-free connection for hydraulic pumps, motors, and high-flow oil lines in demanding industrial and mobile equipment applications.

Core Advantages & Key Engineering Features

Two-Piece Split Design: Simplifies installation and retrofitting in restricted spaces where full-ring flanges cannot be slipped over pipe ends.
Dual Pressure Classes: Available in Standard Duty Code 61 (3000 PSI series) and Heavy Duty Code 62 (6000 PSI series) to match diverse operating pressures.
High-Strength Forged Steel Construction: Precision forged from C45 carbon steel or 316L stainless steel, offering exceptional fracture toughness under extreme pressure surges.
Enhanced Corrosion Protection: Standard surface treatment features Cr3+ trivalent zinc plating, delivering over 350+ hours of neutral salt spray resistance (ASTM B117) against white rust.
Vibration & Shock Resistance: Engineered bolt-hole tolerances ensure uniform clamping force distribution across the flange head face, preventing O-ring extrusion under continuous hydraulic pulsation.

Operating Environment & Application Guidelines

FL / FS / FHS split flange clamps are specifically optimized for high-vibration, high-volume hydraulic circuits where conventional threaded connections are prone to loosening or fatigue failure.

Marine & Offshore Environments: For coastal cranes, marine winches, and port machinery exposed to harsh salt fog, we recommend ordering the Zinc-Nickel (Zn-Ni) coating or AISI 316L stainless steel variant to ensure long-term corrosion immunity.
Mining & Earthmoving Equipment: Ideal for excavator main pumps, hydraulic breakers, and underground mining haulers operating under severe mechanical shock and continuous pressure spikes up to 420 bar.
High-Temperature & Cold Climate Operations: Paired with specialized FKM seals or low-temperature impact-resistant steel alloys, these clamps retain clamping integrity in temperatures ranging from arctic cold zones down to -40°C up to high-ambient steel mill automation lines.

FAQ

Q1: What is the main difference between Code 61 and Code 62 split flange clamps?

A: Code 61 flanges are designed for standard-pressure applications up to 3,000 PSI (210 bar), whereas Code 62 flanges feature thicker material dimensions and closer bolt hole spacings to withstand high-pressure requirements up to 6,000 PSI (420 bar). They are not dimensionally interchangeable.

Q2: Why should I choose a split flange clamp over a solid (one-piece) flange clamp?

A: Split flange clamps (two halves) offer significant installation advantages in tight spaces. They can be wrapped around the flange head of a pre-bent tube or hose assembly without sliding over long pipe lengths, making replacement and maintenance much faster in the field.

Q3: Do these split flange clamps come with bolts and O-rings included?

A: We offer both standalone split flange halves and complete kit packages (including 4 high-tensile 10.9 grade bolts, spring washers, and NBR or FKM O-rings). Please specify your preference when requesting a quote.

Q4: How should split flange bolts be tightened to prevent fluid leakage?

A: Bolts should be tightened evenly in a cross-diagonal sequence to ensure uniform clamping pressure across the O-ring face. Avoid fully tightening one bolt at a time, as this can cause the flange half to tilt and ruin the face seal alignment.