Kristal Engineering

Mfg. of Spring Hanger Support and
Allied Equipments Heavy Fabrication

Spring Support

Kristal’s spring supports ensure reliable load compensation and thermal movement handling in piping and structural systems

Spring Supports | Kristal Engineering

Our Products

VARIABLE LOAD EFFORT SPRING SUPPORTS
CONSTANT LOAD EFFORT SPRING SUPPORT
RIGID ROD HANGER SUPPORTS
PIPE SUPPORTS SLIDING & GUIDING TYPE
HELICAL & COMPRESSION SPRING
PIPE CLAMP, BEAM BRACKET, BASE CLAMP
SLIDING SUPPORT (PTFE & GRAPHITE)

SUPPORTS TO THE PIPE LINE

Pipe line under operation is being supported by various ways. Equipment like rigid Supports or Hanger Supports are adopted at line pipe as and anywhere these are suit. Rigid Support does not allow the movement of pipe line at supporting point at any direction.

While Hanger Supports like Variable Hanger Supports or Constant Effort Hanger Supports are allowing vertical movement to some extent as specified by designer. Due to vertical movement in either direction, up or down, stress may develop in line pipe depending on the magnitude of movement traversed.

Within elastic limit and according to specified limit of movement, permanent set up of strain cannot develop in the line pipe and thus line pipe is not injured due to deflection under load in the pipe. The vertical movements are controlled by hanger support.

When a variable hanger support is directly subjected to the pipe under load with movement, it allows the movements and the magnitude of movement will be increased or decreased according the increased or decreased loads developed in line pipe.

This variable magnitude of load with movements is controlled by variable hanger supports. Sometimes a lengthy movement occurs due to which an adequate high stress develops and the corresponding strain would be the cause of injury of the line pipe.

In this case, to minimize the strain an additional continuous effort is required against the load developed in pipe due to which the lengthy movement takes place in either direction up or down.

A Constant Effort Hanger Support is adopted which exerts a constant effort against the load developed in pipe irrespective of magnitude of movement within a limitation as specified by the designer.

Code & Standard

MSSP-SP 58: Pipe hangers & supports materials – Design & Manufacture.
MSS-SP 69: Pipe Hangers & Supports – Selection & Application.
BS-1726 Part-1: Inspection & Testing of Spring & Spring Hanger Support.
DIN 2093: Manufacturing of Beveled Spring.
ASTM A125: Inspection & Testing of Spring & Spring Hanger Support.
ANSI B31.3: Petrochemical & Refinery Piping.
ANSI B31.7: Power Piping.

Variable Spring Support Selection

Determine Requirements: Identify hot/operating load, movement/travel, and maximum load variation needed.
Select Support Size: Use selection tables to find appropriate size based on load requirements.
Calculate Variability: Verify variability using formula: V = (Movement × Spring Rate × 100) ÷ Hot Load.
Determine Cold Load: Calculate preset load: Hot load + (movement × spring rate).

Constant Spring Support Features

Constant Load: Ensures consistent load handling using a bell crank lever system during thermal movements.
Travel Range: Accommodates movement up to 330mm across twenty different sizes.
Load Adjustment: Allows ±10% adjustment of load capacity via the adjuster nut.
Safety Features: Includes travel stops and indicators to prevent excessive movement.

Installation & Warranty

Installation Procedure: Installation manuals with assembly drawings provided. Spring supports shipped locked in cold/preset load position. Preset locks must be removed after hydrostatic testing and before operation.
Warranty Coverage: 18 months from supply or 12 months from commissioning (whichever earlier). Free replacement for defects in materials or workmanship.

Quality Control

To control quality at every stage, materials are checked or inspected for physical dimensions starting from procurement.

Procurement of Materials:
Raw materials with special types or standard specifications are procured from authorized dealers who provide manufacturer test certificates or EQV certificates.
Visual Checking:
All raw materials are visually inspected for surface cleanliness, proper shape, and correct sizes.
Cutting & Machining:
Gas cutting, edge grinding, machining, drilling, boring, shaping are done per internal Q.A.P. Sharp edges are blunted. Threading is done using master gauge.
Welding:
Weld joints are prepared and carried out as per specification by certified welders. Weld testing is done if required.
Coiled Spring:
Springs go through heat treatment, shot peening, cramping, scragging, D.P. test, and end grinding. Finished springs are bitumen-painted unless specified otherwise.
Load Testing of Spring:
100% springs undergo load-deflection tests with in-house reporting. Additional tests can be done upon client request.
Spring Box Housing & Support Assembly:
Dimensional checking is done for each support type and model after box-up.
Painting:
Final painting follows specification with quality checks and proper finishing.
Packing:
Supports are packed under quality team supervision ensuring safe delivery.

Variable Spring Hanger/Support

Variable spring supports are used where pipelines are under high pressure, high temperature and result in vertical movement. To allow vertical movement, all the loads are taken care of by variable spring support in both the hot and cold position. These are used to protect valuable instruments, pipelines and critical components.

Range:
VS1 to VS5 series. Load range: 8.2 kg to 29,700 kg. Travel: 40 mm, 60 mm, 80 mm, 120 mm, 160 mm. Models: A, B, C, D, E, F, G.

Constant Spring Support

Constant spring supports ensure constant load during movement of pipelines due to thermal expansion. They are ideal for accommodating large vertical displacements while maintaining constant force. The bell-crank lever balances load and movement to reduce kinetic variation.

Range:
20+ sizes with travel up to 330 mm. ±10% load adjustment via nut. Safety locks and travel indicators included.

Top Mounted Constant Hanger

Designed to suspend from above, these constant spring hangers support piping that moves vertically. They use a pivot-based mechanism that keeps load constant during movement, protecting pipe joints from stress.

Range:
Available for load ranges 10–25,000 kg. Vertical travel 100–300 mm. Models TMCH-A to TMCH-G.

Adjustable Spring Support

Adjustable spring supports allow fine-tuning of spring tension on site. Useful where load conditions vary or alignment needs adjusting during commissioning. Equipped with tension locking and preset indicators.

Range:
Load range from 5 kg to 10,000 kg. Spring rate adjustable ±25%. Custom brackets available.

Helical Spring Support

Helical spring supports offer simple elastic support for lighter loads and flexible connections. They absorb small vertical displacements and vibration. Ideal for static equipment connections, tanks, or vessels.

Range:
Load range: 3 kg to 500 kg. Standard travel: 20–60 mm. Spring rate customized per spec.