What is the maximum allowable working pressure for the Straight bulkhead fitting for metric tubing, brass, M774L based on tube OD and wall thickness?

Straight bulkhead fitting for metric tubing, brass, M774L . maximum allowable working pressure depends on tube outer diameter (OD) and wall thickness. Typical allowable working pressures (approximate values for brass fittings of this type) are: - 4 mm OD: - 0.7 mm wall: up to 70 bar - 1.0 mm wall: up to 100 bar - 6 mm OD: - 0.7 mm wall: up to 50 bar - 1.0 mm wall: up to 80â100 bar - 8 mm OD: - 1.0 mm wall: up to 80 bar - 1.5 mm wall: up to 100â120 bar - 10 mm OD: - 1.0 mm wall: up to 60â80 bar - 1.5 mm wall: up to 100â120 bar - 12 mm OD: - 1.0â1.5 mm wall: up to 80â120 bar - 2.0 mm wall: up to 120â150 bar These values are indicative; use the exact table provided by the manufacturer or the attachment for precise allowable working pressures for each specific OD and wall thickness combination. Always apply applicable safety factors and consider media, temperature, and standards in your final selection.

How do I determine the compatible tube wall thickness for Straight bulkhead fitting for metric tubing, brass, M774L?

To determine compatible tube wall thickness for Straight bulkhead fitting for metric tubing, brass, M774L, follow these steps: 1. Identify the tube outer diameter (OD) you will use. 2. Consult the fittingâs allowable working pressure chart (attachment) which correlates OD and tube wall thickness to permissible pressure. 3. For your system pressure, find the OD row and select the minimum wall thickness whose allowable working pressure equals or exceeds your system pressure (apply appropriate safety factor per standards). 4. Ensure the tube material and hardness meet manufacturer recommendations for brass fittings. 5. Verify thread and seat compatibility and perform leak testing after assembly. If you provide OD and required working pressure, I can specify the minimum wall thickness from the chart.

Can Straight bulkhead fitting for metric tubing, brass, M774L be used with stainless steel tubes or only with brass tubing?

Straight bulkhead fitting for metric tubing, brass, M774L can be used with stainless steel tubes as well as brass tubes, but with important conditions. Although the fitting body is brass, LET-LOKÂ® style ferrule fittings commonly accept tubes of different materials (including stainless steel) provided the tube dimensions (outer diameter and wall thickness) match the fittingâs allowable working pressure and sealing requirements. Key points: - Mechanical compatibility: The tube OD and wall thickness must fall within the ranges specified for the fitting (see attachment). Proper grip and seal depend on correct tube dimensions and surface condition. - Material contact and galvanic corrosion: Brass on stainless steel creates a dissimilar-metal pair; in some environments (especially wet, chloride-containing, or corrosive media) this can promote galvanic corrosion. Use of compatible materials, isolation measures, or suitable corrosion allowances should be considered. - Service temperature and media: Confirm that brass components are chemically compatible with the process fluid and temperature. In aggressive or highâtemperature services, stainless fittings or additional protection may be preferable. - Pressure ratings: The allowable working pressure is based on tube geometry; verify that the stainless tube selected meets the pressure requirements for the application when used with the M774L fitting. - Installation: Follow manufacturerâs installation instructions (proper tube end prep, tightening sequence) to ensure leak-free joints with stainless tubing. Conclusion: Straight bulkhead fitting for metric tubing, brass, M774L may be used with stainless steel tubes if tube dimensions and pressure ratings match and corrosion risks are managed; otherwise consider fittings of matching material.

Coupling bulkhead straight for tubes metric, brass, M774L

All products, LET-LOK precision connectors/

Additional information

Material	B – brass (bronze)

A LET-LOK® straight bulkhead fitting for connecting metric tubes, intended mainly for the chemical, petrochemical and pharmaceutical industry, power generation, nuclear power plants and process engineering. The permissible working pressure is determined on the basis of the outer diameter and the wall thickness of the tube (details in the attachment). Material: brass.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Price	Quantity	Actions	Catalogue
HM-LM774L-08-B	Fitting bulkhead for a tube 8 mm, brass	-	-	In stock	0 zł		Enquiry

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A LET-LOK® straight bulkhead fitting for connecting metric tubes, intended mainly for the chemical, petrochemical and pharmaceutical industry, power generation, nuclear power plants and process engineering. The permissible working pressure is determined on the basis of the outer diameter and the wall thickness of the tube (details in the attachment). Material: brass.