13MHH clamp

13MHH clamp

Product catalog summary
Overview: This document provides detailed specifications and standards for the 13MHH clamp dimensions, manufactured by Aerre Inox s.r.l., certified under ISO 9001. It includes information on clamp sizes, materials, and service ratings.
Specifications: The clamps are designed according to BS 4825 standards for pipes conforming to ASTM A270. The document lists various sizes ranging from 1/2” to 12” with corresponding dimensions for outer diameter (OD), thickness (Thk), and inner diameter (ID).
Materials and Construction: The clamps are investment cast pieces made from Stainless Steel AISI 304 – 1.4301, ensuring heavy construction for protection against leakage or misalignment. They are secured with a hand-tightened wing nut.
Hydrostatic Tests: The document specifies hydrostatic test pressures at different temperatures: 1500 psi at 70°F (21°C) and 1200 psi at 250°F (121°C).
Service Ratings: The service ratings are provided for various temperatures and pressures, with specific psi/bar values for different tube sizes. The ratings are based on tests using Standard Buna material gaskets.
Recommendations: For temperatures above 121°C, the use of the 13MHP clamp is recommended. Special caution is advised when using PTFE gaskets due to their incompressibility and tendency to "cold flow," which may lead to leakage.
Additional Notes: The document advises contacting Aerre Inox for further information, especially when considering the use of PTFE gaskets. It also notes that specifications may change without prior notice.
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Catalog excerpts

13MHH clamp-1

Quality System Certified ISO 9001 13MHH clamp dimensions Rev.2.doc Page 1 of 1 Standard BS 4825 for pipe according ASTM A270 Wing nut tightened to = 2,8 Nm of torque Service Ratings are based on hydrostatic tests using Standard Buna material gaskets, with proper expansion of ferrules, assembly of joints and absence of shock pressure. For temperature above 121°C we recommend using 13MHP clamp only. Three segment heavy duty clamp 13MHHS available in size 12” Tube OD only Hydrostatic tests: not available Special Note concerning the limited use of PTFE gaskets: Psi / bar service ratings shown for clamps DO NOT APPLY to 1” and above tube OD sized connections incorporating any gaskets o f PTFE material. As PTFE material by nature is virtually incompressible and tends to ”cold flow” under normal operating conditions, PTFE gaskets, when used with any standard clamp, are likely to leak at pressures far below these published service ratings. To avoid possible leakage problems, we recommend contact us before considering the use of PTFE material and to discuss other viable alternatives. The above limitations do not apply to Fractional Sized %” and %” tube OD fittings and connections. In the interests of development and improvement of the product, we reserve the right to change the specifications without prior notice. Aerre Inox s.r.l. 26010 FIESCO Via Gerola n.4 -CREMONA- Italy Tel. +39.0374.370828 Fax +39.0374.370833 e-mail : [email protected] http :

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