Is the allowable working pressure for the Straight fitting for metric tubing, stainless steel, M762L determined by the tube's outer diameter and wall thickness?

Yes. For the Straight fitting for metric tubing, stainless steel, M762L, the allowable working pressure is determined by the tubingâs outer diameter and wall thickness. The product description for the Straight coupling type LET-LOKÂ® for metric tubing specifies that allowable working pressure is based on those tubing dimensions (see attachment for detailed values). Material: AISI 316 stainless steel.

Straight fitting for metric tubing, stainless steel, M762L

Q: Does the allowable working pressure of the Straight fitting for metric tubing, stainless steel, M762L vary with tubing OD and wall thickness?

Yes. The allowable working pressure of the Straight fitting for metric tubing, stainless steel, M762L depends on tubing outer diameter (OD) and wall thickness. It is determined based on those tubing dimensions (see attached details). The fitting is a LET-LOKÂ® straight coupling for metric tubing, material AISI 316.

Q: How is the allowable working pressure for the Straight fitting for metric tubing, stainless steel, M762L calculated from tube OD and wall thickness?

The allowable working pressure for the Straight fitting for metric tubing, stainless steel, M762L is calculated from the tube outer diameter (OD) and wall thickness using the standard thinâ/thickâwalled cylinder stress relationship for internal pressure, adjusted for material and safety factors. In practice this is done as follows: 1. Determine tube mean radius r = OD / 2 and wall thickness t. 2. Compute the hoop (circumferential) stress under internal pressure: Ï_hoop = (P Â· r) / t (for t << r) or use the thickâwall Lame formula if t is not negligible. 3. Set allowable working pressure P_allow so that Ï_hoop does not exceed the allowable material stress Ï_allow for AISI 316, divided by the applicable safety factor: P_allow = (Ï_allow Â· t) / r. 4. Apply any additional reduction factors required by the Straight fitting for metric tubing, stainless steel, M762L design, joint efficiency, temperature derating, and applicable codes (these are specified in the product attachment). 5. The final allowable working pressure listed for M762L is the result after inserting the specific OD and t values, using AISI 316 allowable stress at the service temperature and including required safety/derating factors per the manufacturerâs tables. Use the manufacturerâs attached tables for direct OD/t combinations for the Straight fitting for metric tubing, stainless steel, M762L to obtain the certified allowable working pressure.

All products, LET-LOK precision connectors/

Additional information

Material	SS – stainless steel

Straight coupling type LET-LOK® for metric tubing intended mainly for the chemical, petrochemical, pharmaceutical, energy, nuclear power, and process engineering industries. The allowable working pressure is determined based on the outer diameter and wall thickness of the tubing (details in the attachment). Material: AISI 316 steel.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
HM-LM762L-02-SS	Straight connector for 2 mm tube, SS	-	-	In stock	Enquiry
HM-LM762L-03-SS	Straight connector for 3 mm tube, SS	-	-	In stock	Enquiry
HM-LM762L-04-SS	Straight connector for 4 mm tube, SS	-	-	In stock	Enquiry
HM-LM762L-06-SS	Straight connector for 6 mm tube, SS	-	-	In stock	Enquiry
HM-LM762L-08-SS	Straight connector for 8 mm tube, SS	-	-	In stock	Enquiry
HM-LM762L-10-SS	Straight connector for 10 mm tube, SS	-	-	In stock	Enquiry
HM-LM762L-12-SS	Straight connector for 12 mm tube, SS	-	-	In stock	Enquiry
HM-LM762L-14-SS	Straight connector for 14 mm tube, SS	-	-	In stock	Enquiry
HM-LM762L-15-SS	Straight connector for 15 mm tube, SS	-	-	In stock	Enquiry
HM-LM762L-16-SS	Straight connector for 16 mm tube, SS	-	-	In stock	Enquiry
HM-LM762L-18-SS	Straight connector for 18 mm tube, SS	-	-	In stock	Enquiry
HM-LM762L-20-SS	Straight connector for 20 mm tube, SS	-	-	In stock	Enquiry
HM-LM762L-22-SS	Straight connector for 22 mm tube, SS	-	-	In stock	Enquiry
HM-LM762L-25-SS	Straight connector for 25 mm tube, SS	-	-	In stock	Enquiry
HM-LM762L-32-SS	Straight connector for 32 mm tube, SS	-	-	In stock	Enquiry
HM-LM762L-38-SS	Straight connector for 38 mm tube, SS	-	-	In stock	Enquiry
HM-LM762L-50-SS	Straight connector for 50 mm tube, SS	-	-	In stock	Enquiry

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Straight coupling type LET-LOK® for metric tubing intended mainly for the chemical, petrochemical, pharmaceutical, energy, nuclear power, and process engineering industries. The allowable working pressure is determined based on the outer diameter and wall thickness of the tubing (details in the attachment). Material: AISI 316 steel.