Technical Installation Requirements

Engineering Standards for Reliable Stainless Steel Piping Systems

Minimum Spacing Requirements

During press connections, minor deformation occurs at pipe joints. Maintaining proper spacing between connections is essential for system integrity.

Basic Handling Principles

Nominal Diameter(DN)	Minimum Spacing L(mm)
15-25	20
32-50	40
65-100	60

Elbow Combination Safety Dimensions

DN	15	20	25	32	40	50	65	80	100
45°L(mm)	48	56	65	90	107	118	233	270	320
90°L(mm)	54	64	82	104	126	140	263	305	355

Pipe Supports and Hangers

Stainless Steel Brackets (with nuts)
Stainless Steel Rod-type Pipe Clamps
Stainless Steel Single Clamps

Gas Pipeline Compensation

Expansion Calculation

ΔL = α * L * ΔT
Where:
α - Linear expansion coefficient (stainless steel: 0.0173 mm/m·°C)
L - Pipe length between fixed supports (meters)
ΔT - Temperature differential (°C)

Compensation Methods

Natural Compensation: Free arm length calculation
Type II Compensation: U-shaped expansion loops
Z-Type Compensation: Offset expansion configuration
Cross Compensation: Multi-directional expansion handling
Ring Compensation: Circular expansion loops
Bellows Expansion Joints: For DN32 and larger pipes

Application Guidelines

Type II or bellows compensators preferred for gas mains and high-rise buildings
Natural, Type II, and Z-type compensation can be installed horizontally or vertically
Bellows expansion joints recommended for DN32 and larger pipelines

Pipeline Installation Specifications

Penetration Requirements

When gas pipelines pass through trenches, building foundations, walls, and floors:

Must be installed within sleeves/casings, preferably coaxial
No connection joints permitted within sleeve sections
Wall, floor, and embedded sections should have protective coating or plastic coating
Annulus between pipe and sleeve filled with flexible, corrosion-resistant waterproof material
Space between sleeve and building structure filled with waterproof material

Minimum Sleeve Diameter Requirements

Nominal Diameter(DN)	15	20	25	32	40	50	65	80	100
L1(mm)	48	56	65	90	107	118	233	270	320
L2(mm)	54	64	82	104	126	140	263	305	355

Important Notice

These technical requirements are minimum standards. Always consult local building codes, project specifications, and engineering requirements. Nonleak recommends professional installation by certified technicians for all piping systems.

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