SAE Hydraulic Butt Weld Flange

QS Flange: Jiangsu SAE Flange

SAE butt weld hydraulic flange to SAE J518 and ISO 6162 part 2, 1/2 to 4 inch in SS304 at 6000 psi, pressure tested at 1.5 times the rating.

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One-Minute Overview

Butt weld hydraulic flange for pipe and tube systems, 1/2 to 4 inch.
6000 psi working pressure in SS304, to SAE J518 and ISO 6162 part 2.
A 1 inch flange uses a 2.75 inch bolt circle, 69.85 mm, with four bolt holes.
Every unit is pressure tested at 1.5 times rating, up to 9000 psi.

This butt weld flange is the 6000 psi member of the SAE J518 family, covering 1/2 to 4 inch in SS304 and following ISO 6162 part 2. Because the pipe is welded to the flange with a full section joint, the connection carries no threaded or slip on leak path, and the weld strength is meant to match the base material.

Name: SAE Hydraulic Butt Weld Flange
Standard: SAE J518, ISO 6162 part 2
Size: 1/2 inch - 4 inch
Material: SS304
Pressure: 6000 psi
Type: Butt Weld
Application: Used in pipe and tube systems

The series is dimensioned so parts interchange with other makers working to the same standards: a 1 inch flange, for example, has a bolt circle of 2.75 inches, 69.85 mm, drilled with four bolt holes. Each unit is factory pressure tested at 1.5 times the working pressure, up to 9000 psi at the 6000 psi rating, to check sealing and structural integrity. SS304 resists oxidation, chemical attack and thermal stress, and the butt weld layout removes the potential leak path that a socket weld leaves behind and reduces stress concentration, which is what lifts fatigue life on a vibrating circuit. Typical duty is hydraulic power units, mobile equipment, industrial machinery, petrochemical and off-shore work, energy transmission, injection molding machines, steel mill circuits and subsea control lines.

FAQ

Q1. Where does the 6000 psi figure come from?

It is the working pressure of the series, set by SAE J518 and ISO 6162 part 2, and it is backed by testing at 1.5 times that value, up to 9000 psi, before a unit is released. The dimensions follow the same standards, so the part matches a port of the same size and code.

Q2. Why butt weld rather than socket weld on a 6000 psi circuit?

The butt weld closes the section with a full penetration joint, so there is no crevice left behind as with a socket weld, and fewer points where stress can concentrate. On a circuit that vibrates, that is the difference that counts: the weld carries the load evenly and fatigue life runs longer.

Q3. Can it sit in the same line as flanges from another supplier?

Yes, if that supplier works to SAE J518 and ISO 6162 part 2. The standards fix the dimensions, so the parts interchange: a 1 inch flange has a 2.75 inch bolt circle, 69.85 mm, with four bolt holes, and that pattern holds across makers working to the same norm.

Q4. How long will production take?

Standard sizes are typically ready within 30 days, and in-stock items ship immediately. Larger or custom orders get a confirmed date per order, because the schedule depends on quantity, material, the bolt pattern you specify, and how busy production is at the moment you order.

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