Mss Sp 69 Pdf [hot]
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Piping systems carry high-pressure fluids, hazardous chemicals, or extreme-temperature steam. A support failure can lead to leaks, bursts, or structural collapses. Following MSS SP-69 ensures compliance with safety factors required by broader codes like ASME B31.1 (Power Piping) and ASME B31.3 (Process Piping). 2. Managing Thermal Movement
: The American National Standards Institute (ANSI) website also offers standards for purchase, including those from MSS. You can search for MSS SP 69 and buy a PDF version. mss sp 69 pdf
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– Defines the purpose and coverage of the standard. 2. Objective – Outlines the intended outcomes for the user. 3. Classification of Piping Systems – Categorises piping systems by service conditions, which influences support selection. 4. General Requirements – Sets out fundamental principles for support design. 5. Material Requirements – Specifies acceptable materials for hanger components. 6. Dimensional Requirements – Provides standard dimensions for various support types. 7. Selection of Hangers and Support for Pipe Movement – Guides the choice of supports based on the type and direction of pipe movement (thermal expansion, contraction, etc.). 8. Attachments Made by Welding or Bolting – Covers how to securely attach supports to pipes and structures. 9. Hanger and Support Spacing – Perhaps the most frequently consulted section, this provides maximum allowable spans between supports based on pipe size, wall thickness, and service conditions. For example, MSS SP‑69 states accepted maximum spans as short as 6 feet for small‑bore pipe and as long as 20 feet for large‑bore pipe. 10. Pipe Attachments for Insulated Lines – Addresses the special requirements of supporting insulated piping, including the use of protection shields (type 40 saddles) to prevent crushing of insulation. 11. Multiple Supports – Guidance for supporting multiple pipes from a single structural member. 12. Riser Supports – Specific recommendations for vertical piping runs. 13. Anchors, Guides and Restraints – Covers devices that control pipe movement rather than merely supporting weight. 14. Fire Protection Systems – Special considerations for supports in sprinkler and other fire‑protection piping. 15. Ductile Iron Piping – Material‑specific guidance. 16. Cast Iron Soil Piping – Material‑specific guidance. 17. Glass Piping – Material‑specific guidance for brittle materials. 18. Plastic Piping – Guidance for thermoplastic and thermoset piping. 19. Fiberglass Reinforced Pipe (FRP) – Recommendations for composite materials. Annex A – Lists referenced standards and applicable dates. To help me tailor this information or guide
The standard assigns figure numbers to common support configurations (e.g., Figure 1 – Adjustable clevis hanger, Figure 10 – Roller support, Figure 24 – Sway brace). Each figure includes:
While historically a standalone document, modern practitioners should note that the contents of MSS SP-69 were officially incorporated into the comprehensive standard. However, SP-69 remains frequently referenced in legacy project specifications and is still available as an active document through various Standardization Society outlets . Scope and Primary Objective Because MSS standards are protected by copyright laws,
This document provides comprehensive guidelines on how to choose, size, and apply pipe hangers and supports for various piping configurations. It bridges the gap between engineering design and practical field installation, ensuring that piping systems are supported safely under all operating conditions. The Evolution and Current Status of MSS SP-69
Utilize internal coil springs to support the pipe load while permitting vertical thermal movement. The supporting force varies with spring compression.