Variable Spring Hangers & Supports

AAA SUPPORT PVT LTD. is specialized in designing and manufacturing of spring hangers and its accessories. Our comprehensive service includes the supply of a wide range of pipe hangers equipment .Existing facilities for the design and supply of any special pipe support fabricated and in a wide range of materials to suit the customer's requirement. Designing and manufacturing system are controlled documents system incorporated in our quality assurance and quality control plan.

Variable Spring Support

Variable Spring Supports are used where pipeline are under high pressure, high temperature and results in vertical movement. To allow vertical movement, the entire loads are taken care of by Variable Spring Supports in both the hot and cold position. The Variable Spring Supports are utilized to protect valuable instrument, pipeline a critical component. The designs of the Variable Spring Supports are based on loads, movements and modals to suit the required position on pipelines and also depending on the weather condition.



Range

We offer three series prefixed VS1, VS2 & VS3 twenty-five spring sizes allow a range of load 8.2kgs to 27.43 tons. In all the series VS1, VS2 & VS3 provide travel 40mm, 80mm& 160mm respectively. It also takes 5 co-liner displacements. We offer models such as A, B, C, D, E, F, G and for corrosion resist supports AC, BC, CC, DC, EC, FC & GC.

Special Range/Design

Apart from our standard design and product range, we undertake jobs specially designed by us to suit Clint's requirement to avoid corrosion. We offer PU or neoprene rubber coating on spring and epoxy painting/galvanizing.

Design Principles

Supports components are arranged in a series of load groups, the load within each load group is in strict accordance with the permissible load of the connecting thread. All supports have a strictly symmetrical shape; have single upper and lower load connection resulting a moment free load connection to the structure. The actual travel position of the hangers/supports can be read directly from the travel scale in mm in accordance with the actual travel. All hangers/supports can be blocked in installation position within a close raster.

Supply Standard

All hangers/supports have a rivet on name plate with travel scale displaying series, size, type, hot load, cold load, travel and client's tag no.

Method of Selection (Variable)



Standard / Design Principles

Designing, manufacturing dimensions of component and material properties are in accordance with appropriate standards and approved rate of techniques. The following standards have been taken into consideration.

BS 1726 Part 1 Coil Springs
BS 3974 Part 1,2&3 Pipe Supports, Slider & Ancillaries
MSS SP 58 Pipe Hangers Supports (Materials Design & Manufacturing)
MSS SP 69 Pipe Hangers Supports(Selection & Application)
ANSI B 31.3 Petroleum Refinery Piping
ANSI B 31.1 Power Piping
DIN 2092 & 2093 Disc Spring

Deigning & dimensions are subjected to change due to continuous up gradation & improvement of our product.

Ordering Information

  • Value of operating or hot load on pipeline.
  • Value of Travel or movement and it direction towards cold position to hot position.
  • Modal or type of hangar as shown 'A' to 'G'/'AC' to 'GC'/'AH' to 'FH'/'AV' to 'FV' or figure no.
  • Value of pre-set or cold load on the pipeline
  • Variability or load variation factor (cold or hot)
  • Type & size of attachment (if required)
  • Temperature of pipeline(if required)

Quality Control / Inspection

All springs are tested as per BS-1726 part-1/ASTM A125.Each and every spring support is subjected to some rigorous internal inspection at our end and there after offered to the inspecting officer of the Clint/inspection agency concerned for final inspection of required load and travel in our sophisticated testing machine as per approved Quality Assurance Plan & Drawing. All test certificates shall be provided for client verification.

Material

SPRING EN-42 or IS-4454 Part-1 Gr-II upto Ø12mm & EN-45/EN-47-ABOVE Ø12mm.
CASING IS-1239/3589(medium) & IS-2062
HANGER ROD Carbon steel to IS-2062 Gr A/B
TOP LUG Carbon steel to IS-2062 Gr A/B
BEAM ATTACHMENT Carbon steel to IS-2062 Gr A/B
TURN BUCKLE Carbon steel to IS-1875 Gr CL-2(Forged) upto M30
PIPE TB (SA 106 Gr B) Carbon steel to IS-2062 Gr A/B (Machined) above M30
PIPE CLAMP, SHOE & U-BOLT Carbon steel to IS-2062 Gr A/B upto Temperature 350°C
  Alloy steel to 1%Cr., 0.5%Mo (ASTM A182 F11) upto Temperature 470°C
  Alloy steel to 2%Cr., 1%Mo (ASTM A182 F22) upto Temperature 550°C
  Stainless steel to AISI 304/316/321 above temperature 550°C
BOLT /STUD & NUT Carbon steel to IS-1363/67 CL-4.6/4.0 upto Temperature 340°C
  Alloy steel to A193 Gr.B7/A194Gr.2H upto Temperature 470°C
  Alloy steel to A193 B16/A194 Gr.4 upto Temperature 550°C
  Stainless steel to A193 B8/A194 Gr.8 above Temperature 550°C
PLATE/ST.STEEL Carbon steel to IS-2062 Gr A/B
LOW FRICTION PAD PTFE upto Temperature 210°C
  Graphite upto Temperature 550°C
STEEL BALL Carbon steel upto Temperature 350°C
  Stainless steel upto Temperature 550°C
NAME PLATE & LOAD-TRAVEL SCALE Aluminum Anodized
PAINTING  
Our Standard Two Coats Of Zinc Chromate Red/Grey oxide primer IS:2074 and one coat Of Finish enamel paint to IS-5:1973
On Request Spring to be PU / Neo-prene rubber coating.
Casing & component to be hot dip galvanized to IS: 2629/A153/A123 except threaded portion.
Epoxy zinc phosphate primer & high build epoxy finish.
Threaded component shell be electro zinc coated to ASTM B633/B76
Threaded component shell be electro zinc coated to ASTM B633/B76
MARKING Each and every variable & constant supports are fitted with a metallic load travel scale cum name plate on which all references are punched Such as Cold & Hot Load, Travel, Support Tag Number, Size etc. All items of ancillary equipment are clearly identified with Clint's tag number.
PACKING Each and every spring support and its ancillary equipment are properly packed in Wooden Box/Crate. Packing list shall indicate contain of item against respective box no.

Guarantee

Each and spring support /hanger assembly is guaranteed for a period of 18 month from the date of supply or 12 months from the date of commissioning, whichever is earlier. We shall replace with free of charges if any materials, which owing to defect in raw materials or workmanship, should fail within guaranteed period.

Installation Instruction

Fix the spring support in accordance with your pipeline drawing maintaining Tag No. if required adjustment can be made by twisting turnbuckle for hanging type or threaded load column pipe for bottom supported type, till if comes to the mark indicating the pre-setting cold load.

All variable and constant spring supports are locked in cold/pre-set load. Variable spring supports are locked by side studs & nuts from either side for constant spring supports by a pin, both of which are indicated by an arrow mark. After application of the hydrostatic load and before the pipe line comes into operation, pre-set locking arrangement are to be removed to take care of thermal movement & pipe load.

Height adjustment by twisting of turnbuckle or threaded load column pipe should not be made in loaded condition. Erection & pre-set removal instruction writ up are pasted separately on variable and constant spring box.

Variable Spring Supports - F Type
Variable Spring Supports - F Type
Variable Spring Hangers - B Type
Variable Spring Hangers - B Type