ASTM A1128
Standard Specification for Stainless Steel Shielded, Rubber Gasketed Couplings Having an Integral Restraint Feature for Joining Hubless Cast Iron Soil Pipes and Fittings Where External Restraint Is Required
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About This Item
ASTM A1128 is the standard specification for stainless steel shielded, rubber gasketed couplings with an integral restraint feature used to join hubless cast iron soil pipes and fittings where external restraint is required. It is relevant when selecting components intended to provide a secure connection while helping maintain joint integrity under installed service conditions. ASTM A1128 supports clear product expectations for procurement, evaluation, and quality control in drainage and soil pipe applications.
What is ASTM A1128?
This ASTM standard defines requirements for a specific type of coupling: stainless steel, shielded, rubber gasketed, and built with an integral restraint feature. Its focus is on couplings used to connect hubless cast iron soil pipes and fittings in situations where external restraint is needed. In practice, ASTM A1128 helps describe the product form, intended connection method, and performance expectations so buyers and specifiers can identify suitable couplings for compliant installations.
Where is ASTM A1128 used?
ASTM A1128 is commonly used in plumbing and drainage systems that rely on hubless cast iron soil pipe and fittings. It is especially relevant where a restrained joint is needed to help resist separation from external forces or installation conditions. This makes the standard useful for contractors, engineers, inspectors, and distributors working with shielded couplings in cast iron piping assemblies. ASTM A1128 is typically referenced during product selection and specification review for these connections.
Why is ASTM A1128 important?
This standard matters because it helps create consistency in a coupling type that must perform reliably in restrained pipe joints. By defining expectations for the stainless steel shielded, rubber gasketed coupling with integral restraint, it supports better product comparison, procurement, and quality control. ASTM A1128 can also reduce installation risk by giving specifiers and installers a common technical reference for evaluating suitability in hubless cast iron soil pipe applications where external restraint is required.
- Stainless steel shielded coupling
- Rubber gasketed joint design
- Integral restraint feature
- Hubless cast iron soil pipe applications
- External restraint requirement
- Publication Date: 2024-05-17
- Publisher: ASTM
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