SAE Split Flange Clamps 3000 PSI Code 61: FL Series

Why These SAE Split Flange Clamps Pass the Compliance Gate

These SAE split flange clamps, series FL, are the four-bolt clamp halves that lock a Code 61 flange head against a flat port pad. The profile follows the Code 61 envelope printed on the data sheet, ISO 6162 – SAE J518, at the nominal 3000 psi family level with a size-dependent pressure rating per clamp. For an OEM, FL clamps turn a flange type hose fitting into a clean, repeatable port connection. For a distributor, one line covers seven flange sizes from 1/2″ to 2.1/2″. For a maintenance team, they are the direct replacement when a clamp is worn, corroded, or lost on a machine.

• Code 61 split flange clamp halves dimensioned per ISO 6162 – SAE J518, as printed on the FL data sheet.
• Seven flange sizes from 1/2″ to 2.1/2″, each with its own MPa pressure rating in the table.
• Bolt hole diameter (D), bolt spacing (C and E), and the recommended BOLT size printed for every clamp.
• High-strength carbon steel, heat treated, with plating options matched to the environment.
• Mates with HENGHUA SAE flange type hose fittings that carry the same Code 61 flange size.

Core Advantages

1. Code 61 envelope compliance. FL clamps follow the SAE J518 / ISO 6162-1 geometry, so these code 61 flange clamps pair with any Code 61 flange head of the matching flange size, including the HENGHUA code 61 flange hose fitting range.
2. One series, seven flange sizes. From 1/2″ to 2.1/2″, the matrix covers pumps, valves, cylinders, and motor case drains with a single supplier line.
3. Printed bolt and pressure data. Every row lists the BOLT size to order and the size-dependent pressure rating in MPa, so the purchasing check is done on the page.
4. Corrosion protection matched to duty. Trivalent zinc (96 h salt spray), zinc-nickel (720 h), or Dacromet (1000 h); 304/316L stainless on request.

Especificaciones técnicas

What Are SAE Split Flange Clamps?

A flange connection has three parts: the flange head on the hose fitting, the O-ring between the head and the port pad, and the split flange clamps that hold everything together. Each pair of SAE split flange clamps consists of two clamp halves and four bolts; the halves close over the flange head and the bolts pull the head face down onto the pad. The result is a compact, vibration-resistant joint that orients freely on the machine.

This FL page covers the clamp halves only. The flange head arrives on the hose fitting itself, so when you buy flange type hydraulic hose fittings you still need the matching split flange clamp halves, the O-ring, and the bolts to complete the joint. Code 61 is the 3000 psi family (ISO 6162-1); Code 62 is the 6000 psi family (ISO 6162-2). The head, the clamp, and the pad must all be the same code and the same flange size.

Dimensional Data

Dimension symbols follow the drawing printed on the data sheet. All values are in millimeters (mm).

Full Dimension Table (Part Number Matrix)

The matrix below is transcribed directly from the FL data sheet. In each part number, FL is the Code 61 split flange clamp series and the two digits are the flange dash in 1/16″ increments, for example FL-32 means a 2″ flange (dash 32). Dimensions are in mm as printed; BOLT and MPa values are copied exactly from the sheet.

Footnote as printed on the data sheet: Bolt should be ordered separately. The SAE split flange clamps are supplied without bolts, so add the BOLT column size to your order and confirm the length and property class against the port pad.

Material and Heat Treatment

Working Pressure and Operating Envelope

For these code 61 flange clamps, treat the printed MPa value as the rating of the clamp pair alone. The complete joint never exceeds the weakest component, so verify the flange fitting rating and the bolt property class against the data sheet that ships with every order.

Selection and Ordering

How to Read the Part Number Matrix

Read the series first: FL means code 61 flange clamps for the 3000 psi family, per ISO 6162 – SAE J518. Then read the digits as the flange dash in 1/16″ increments: FL-08 is 1/2″, FL-12 is 3/4″, FL-16 is 1″, FL-20 is 1.1/4″, FL-24 is 1.1/2″, FL-32 is 2″, and FL-40 is 2.1/2″. Match that flange size to the flange head on your hose fitting and to the port pad on the machine; all three must agree.

Flange Size and Dash Size Chart

If the machine runs 6000 psi Code 62 connections, the FL series does not fit; order the FS series split flange clamps instead and keep the code separate in your stock.

Cross Reference Service

Send us your legacy part number, a drawing, or a physical sample, and we map it to the closest HENGHUA FL code. If you currently run Code 61 split flange clamp halves sourced under legacy numbers, include the old part number and a photo of the clamp so the match can be confirmed before you order. The service is free for volume buyers, and the confirmation includes flange size, dash, dimensions, and the BOLT size so your team can verify before ordering.

Packaging and Logistics

Assembly and Use Guide

Four-Step Flange Assembly Method

1. Confirm the flange specification. Check that the clamp series is FL (Code 61), and that the flange size and dash match the flange head on the hose fitting and the port pad.
2. Fit the O-ring. Seat the O-ring in the groove on the flange head face, keep it clean, and apply a light lubricant.
3. Close the split flange clamp halves over the flange head. Align the bolt holes with the threaded holes in the port pad and keep both halves square to the pad face.
4. Insert the specified bolts and tighten them in a diagonal sequence in two or three passes. Use the bolt size from the BOLT column and the torque from the data sheet that ships with the order.

Matching the Flange Connection

The SAE split flange clamps work with any SAE flange type hose fitting that carries a Code 61 flange head of the same flange size. Center the head over the port, seat the O-ring, and follow the four steps above for every size in the FL range, from the 1/2″ clamp to the 2.1/2″ clamp. Never reuse a crushed O-ring or a clamp that has been deformed in service.

Installation Warnings

• Do not mix Code 61 (FL) and Code 62 (FS) hardware; the heads, clamps, bolt spacing, and pad dimensions are not interchangeable.
• Do not force an FL clamp onto a flange head of a different flange size, and never drill or ream the bolt holes to make it fit.
• Do not reuse clamp halves with cracks, heavy corrosion, or stretched bolt holes; a deformed clamp cannot hold the seal load.
• Bolts must be ordered separately. Using the wrong bolt size, length, or property class risks joint failure; confirm against the BOLT column and the port pad.
• Do not torque one bolt fully before the others. Tighten in a diagonal sequence in stages so the clamp loads evenly.
• Inspect the O-ring and the pad face before assembly; replace the O-ring if it is pinched, cut, or hardened.
• Use the torque value from the data sheet provided with every order. Do not rely on guesswork for high-pressure flange joints.

OEM Customization and Quality Traceability

Customization Options

Surface finish can be set to zinc, zinc-nickel, or Dacromet; 304/316L material is available for corrosive duty; laser marking adds your logo and batch number to each clamp half. Custom packaging, private-label boxes, and mixed-size kits are standard OEM options with a 24 h quotation response.

Quality and Traceability System

Incoming material, cold forming, machining, heat treatment, surface finishing, 100% inspection, marking, and packaging are each recorded for the SAE split flange clamps. A batch number traces back to the steel heat and the heat-treatment and inspection records. MTRs ship with the order, and BV/SGS third-party inspection can be arranged before shipment.

FAQ

Q: What are SAE split flange clamps used for? A: Two clamp halves and four bolts lock a Code 61 flange head against a flat port pad, sealing the O-ring between the head and the pad. They complete the flange connection started by a flange type hose fitting.

Q: Is the FL series Code 61 or Code 62? A: Code 61. The FL series is the SAE split flange clamps family for 3000 psi nominal connections per ISO 6162 – SAE J518. For 6000 psi Code 62 systems, use the FS series; the two codes never mix.

Q: Are the bolts included with the clamps? A: No. The bolts must be ordered separately, as stated on the data sheet. Use the BOLT column in the matrix, for example M10X30 for FL-12, and confirm length and property class against the port pad.

Q: Which hose fittings do these clamps fit? A: Any flange type hose fitting with a Code 61 flange head of the same flange size, such as the HENGHUA SAE code 61 flange hose fittings. Match the clamp flange size to the head and the pad.

Q: How do I read a part number like FL-20? A: FL is the Code 61 split flange clamp series and 20 is the flange dash in 1/16″ increments, which is a 1.1/4″ flange. Check the FLANGE SIZE column in the matrix for the full list.

Q: What does the MPa figure mean in the table? A: It is the size-dependent pressure rating printed for each clamp on the data sheet. Smaller clamps carry a higher rating, for example 34.5 MPa for FL-08, while the 2.1/2″ FL-40 is rated 10 MPa. The finished joint is limited by the weakest of the head, O-ring, and bolts.

Q: What materials and finishes are available? A: High-strength carbon steel with carburized case hardening, HRC 20-28, is standard. Trivalent zinc, zinc-nickel, or Dacromet plating is selected by environment, and 304/316L stainless is available on request.

Q: Can HENGHUA make custom-marked clamps for an OEM program? A: Yes. Laser marking, custom finish, stainless material, and private-label packaging are standard options, with batch traceability and a 24 h quotation response.

Solicitar un presupuesto

Tell us the flange size and series (FL, Code 61), the quantity of clamp pairs, the surface finish, and whether bolts are needed, and we will confirm price and lead time within 24 hours. OEM buyers can add legacy part numbers or drawings for cross reference. Samples ship worldwide so your team can gauge these SAE split flange clamps before you commit.

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