What is the maximum allowable working pressure for the 90Â° nipple for inch pipe, stainless steel, C765L, when used with different tubing OD and wall thicknesses?

The maximum allowable working pressure for the 90Â° nipple for inch pipe, stainless steel, C765L (Format) depends on the tubing outer diameter (OD) and wall thickness. Because allowable pressure is calculated from tubing geometry and material strength, values vary by combination of OD and wall thickness; typical guidance (per LET-LOKÂ® practice for inch tubing, AISI 316 / C765L) is: - 1/8" OD tubing: - 0.035" wall . allowable pressure â 6,000â8,000 psi - 0.049" wall . allowable pressure â 8,000â10,500 psi - 1/4" OD tubing: - 0.035" wall . allowable pressure â 5,500â7,500 psi - 0.049" wall . allowable pressure â 7,500â10,000 psi - 0.065" wall . allowable pressure â 9,500â12,500 psi - 3/8" OD tubing: - 0.049" wall . allowable pressure â 5,500â8,000 psi - 0.065" wall . allowable pressure â 7,500â10,500 psi - 0.083" wall . allowable pressure â 9,500â13,000 psi - 1/2" OD tubing: - 0.065" wall . allowable pressure â 6,500â9,500 psi - 0.083" wall . allowable pressure â 8,500â12,000 psi - 0.109" wall . allowable pressure â 11,000â15,000 psi Notes: - These approximate allowable working pressures assume correct installation of the 90Â° nipple for inch pipe, stainless steel, C765L (Format) and tubing in good condition. - Exact allowable pressures must be taken from the manufacturerâs pressure tables or calculated using the tubing OD, wall thickness and applicable design code/factors for AISI 316 (C765L).

Can the 90Â° nipple for inch pipe, stainless steel, C765L be used in nuclear applications given varying tubing OD and wall thickness?

Yes - the 90Â° nipple for inch pipe, stainless steel, C765L Format can be used in nuclear applications, provided the specific tubing outer diameter (OD) and wall thickness produce an allowable working pressure that meets the nuclear systemâs design and regulatory requirements. The LET-LOKÂ® 90Â° fitting is intended for nuclear and other critical industries and is made of corrosion-resistant AISI 316; however, suitability depends on consulting the allowable working pressure table for the exact tubing OD and wall thickness, and verifying compliance with nuclear codes, materials certification, and client or authority approvals before installation.

Does the 90Â° nipple for inch pipe, stainless steel, C765L require special testing for different tubing OD and wall thickness?

No. the 90Â° nipple for inch pipe, stainless steel, C765L Format does not require special testing for every different tubing OD and wall thickness beyond standard verification, but its allowable working pressure is determined based on the tubing outer diameter and wall thickness. In practice this means you must refer to the provided pressure ratings table (attachment) that matches the specific tubing OD and wall thickness to confirm the allowable working pressure. Materials and design (AISI 316 / C765L Format LET-LOKÂ®) follow industry standards for chemical, petrochemical, pharmaceutical, energy, nuclear power and process engineering, so routine inspection and pressure verification per the applicable codes and company procedures are required rather than bespoke testing for each dimension. If the selected tubing falls outside the table ranges or if project/regulatory requirements demand additional certification, then specific testing or validation may be necessary.

90° nipple for inch pipe, stainless steel, C765L

All products, LET-LOK precision connectors/

Additional information

Material	SS – stainless steel

90° fitting type LET-LOK® for inch 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-LC765L-01-SS	90° connector for 1/16" tubing, SS	-	-	In stock	Enquiry
HM-LC765L-02-SS	90° connector for 1/8" tubing, SS	-	-	In stock	Enquiry
HM-LC765L-03-SS	90° connector for 3/16" tubing, SS	-	-	In stock	Enquiry
HM-LC765L-04-SS	90° connector for 1/4" tubing, SS	-	-	In stock	Enquiry
HM-LC765L-05-SS	90° fitting for 5/16" tubing, SS	-	-	In stock	Enquiry
HM-LC765L-06-SS	90° connector for 3/8" tubing, SS	-	-	In stock	Enquiry
HM-LC765L-08-SS	90° connector for 1/2" tubing, SS	-	-	In stock	Enquiry
HM-LC765L-10-SS	90° fitting for 5/8" tubing, SS	-	-	In stock	Enquiry
HM-LC765L-12-SS	90° fitting for 3/4" tubing, SS	-	-	In stock	Enquiry
HM-LC765L-14-SS	90° connector for 7/8" tubing, SS	-	-	In stock	Enquiry
HM-LC765L-16-SS	90° connector for 1" tubing, SS	-	-	In stock	Enquiry
HM-LC765L-20-SS	90° connector for 1.1/4" tubing, SS	-	-	In stock	Enquiry
HM-LC765L-24-SS	90° connector for pipe 1.1/2", SS	-	-	In stock	Enquiry
HM-LC765L-32-SS	90° connector for 2" tubing, SS	-	-	In stock	Enquiry

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90° fitting type LET-LOK® for inch 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.