How to select and match lean pipe connectors?

When choosing a lean pipe joint, it is necessary to make a comprehensive judgment based on the pipe specifications, connection methods, load-bearing requirements, and functional scenarios. The following are the key selection points:

1. Confirm the specifications of lean management
Lean pipe joints need to be precisely matched with the outer diameter of the pipe, and common specifications are:
-28mm: The most mainstream specification, suitable for most light and medium-sized shelves, workbenches, and material trucks, and is the mainstream choice in the market.
-43mm: Used for scenarios that require higher load-bearing capacity or greater structural strength, such as heavy-duty shelves or large conveyor lines.

>Note: The third-generation aluminum alloy lean tube generally adopts the 28mm specification, with an inner diameter of 28mm and 4 grooves on the surface for easy fastener connection.

2. Select the connector type based on the connection function
Different joints achieve connections from different angles and structures. The common types and uses are as follows:

-Right angle connection (90 °):
-External fasteners/joints (such as HJ-1): clamped from the outside of the pipe, used for connecting workbench corners, shelf columns, and crossbeams, easy to install.
-Internal expansion parts/connectors: Expansion and fixation from the inside of the pipe, resulting in a cleaner appearance and better load-bearing capacity after connection.

-Three way/four-way connection:
-Three way connector (HJ-2, HJ-4): used for the intersection of three pipes, such as connecting the front and rear beams of a shelf column, to achieve a three-dimensional structure.
-Four way connector (HJ-3): used for the vertical intersection of four pipes to construct the core node of a complex framework.

-Parallel connection:
-Parallel clip/parallel joint (HJ-8): connects two parallel pipes, some models support unilateral rotation, suitable for flipping mechanisms or flexible conveyor lines.

-Multi angle/activity connection:
-Universal joint/multi angle joint (HJ-7): adjustable by 180 ° rotation, suitable for inclined material racks or turning assembly lines.
-Rotating sleeve: allows the connected pipe to rotate in a circular manner, but cannot translate.

-Special functional components:
-Linear expansion component: used to extend the length of pipes and achieve seamless elongation.
-Plate clip: No tools required, directly clamp two parallel pipes, suitable for quick assembly.
-Fluent strip connector: specifically designed for installing fluent strips to improve the efficiency of shelf item sliding.

3. Consider load-bearing capacity and environment
-Lightweight scenarios (such as electronic component turnover): 28mm aluminum alloy joints are sufficient, with light weight and corrosion resistance.
-Heavy duty scenarios (such as automotive parts warehousing): It is recommended to use 43mm specifications or reinforced external fasteners, and pair them with supporting casters or profile adapters to enhance stability.
-Wet/corrosive environment: Priority should be given to stainless steel materials or aluminum alloy joints with anodized surfaces to enhance durability.

4. Reference standard number and brand
Some connectors follow industrial standards, such as GB9074.1-17. When selecting, standard numbers (such as HJ-1, HJ-2, etc.) can be provided to confirm with the manufacturer to ensure compatibility.
Mainstream brands such as SUNQIT provide supporting systems, and it is recommended to choose complete sets of accessories to ensure interchangeability.