ASTM A234/234M PIPE FITTINGS OF WROUGHT CARBON STEEL FOR 
MODERATE AND ELEVATED TEMPERATURE

Long Radius Piggable Bends

R=3D, 5D, 8D... 22D & Size Upto 32"

In stainless steel, alloy steel, carbon steel & nickel alloys seamless & welded long radius piggable bends half and full size rings and spray ring headers upto 7000 mm dia. mfg. range:- 2d, 5d, 8d, upto 22d, 45o, 90o, 180o, 360o sizes upto 24 " nb also mfg. "j", "s", "u" and special bends, oval rings, spool pieces etc. as per customer drawing & specn.

DIMENSIONAL TOLERANCE :
flattening on any point max. 1.7% ovality within 1.5% of the dia. of pipe angle +/- 1.5o of w.t., thinning max. 5.9% of w.t., dummy pig pass test done with 96% i.d. 
of  bends, no flaring, wrinkle free bends

WE ALSO MANUFACTURE

Large Size Butt Weld Pipe Fittings Up to 32" N.B.

MANUFACTURING PROCEDURE FOR LONG RADIUS PIGGABLE BENDS 

Stainless Steel, Alloy Steel, Carbon Steel, L.T.C.S., NACE & NICKEL ALLOYS

Seamless & Welded Long Radius Piggable Bends & Spray Ring Headers Mfg.
Range : 2D, 5D, 8D Upto 22D, 45°, 90°, 180°, 360° size upto 24"NB

Dimension Tolerances : Flattening on any point max 2.2%, Angle +/- 1.5° ovality with in 1.5% of the Dia.of pipe,thinning max.5.9% of W.T.,Wrinkle free Bends. Dummy pig test shall be done upto 96% I.D.of Bend

1. ISSUE OF WORK ORDER :
     
   1.1  Technically & commercially clear Purchase Order.
   1.2  Manufacturing Codes / Standards as per Client Requirement / Approved Drawing/Approved QAP.
   1.3  Technical Data like Matrl Spec, & Dimn, NDT Requirement & its Specn
   1.4  For free issued Pipes by client, we take proper care for handling, secure storing, saving minimum           wastage, proper accounting and its after Mfrg. For bend physical properties are being maintained, as per M.T.C. of pipe, with any third party inspection agency.
2.  RAW MATERIAL RECEPT, INSPECTION & ACCEPTANCE:-
     
    2.1  Verification of purchased material as per Purchase Order and Specn.
   2.2  Co-Relation of Heat No of Material with Mill Test Cert.
   2.3  Co-Relation of MTC as per Spen.
   2.4  For all accepted materials Visual and dimensional check are carried out.
   2.5  Punching Lot Nos and Color-coding using hard punch/ Stencil allotted identification No. For materials.
   2.6  If original MTC is not received / available check testing is carried out 
3.  MANUFACTURING CONTROL OF SEAMLESS & WELDED LONG RADIUS PIPE BENDS:-
     
   3.1  Marking on pipes are done as per Cutting Length make sure the individual pieces
          bears the Allotted Lot No.
   3.2  The pipes are filled with sand, lead or Gum based Rosin.
   3.3  After filling of Insert Material the pipes are taken for further Hot/Cold forming process.
   3.4  Stage wise Inspection is carried out on Processing Level Like Flattening, ovality, thinning, Wrinkle & Angle.
   3.5  If any type welding is required for bends, our welders are qualified as per your approved WPS &           PQR.
   3.6  Final Inspection is carried out on bending machine, before taken out for final processing.
   3.7  Visual and Dimension check are carried out during production for Flattening radius Diameter /           Ovality, Height Bevel end angle, Min. & Max. Wall thickness is Recorded. NDT is carried out as per           Approved QAP/DRG.
   3.8  Heat Treatment:- For S.S. solution annealing, A.S. annealing, C.S. normalizing L.T.C.S hardenng  &           temper.
   3.9  Test coupon are send for check testing as per specification / Approved QAP/DRG./ Client           Requirement.
   3.10 For S.S. Bends pickling, and passivation are carried out before dispatch.
   3.11 C.S., A.S. & L.T.C.S bends are shot blasted, wire brushed and rust preventives are applied before           dispatch.
   3.12 Final marking are done by Hard Punching/Stencile that bears the following details
           (Mfg's Monogram / Specn/Dimn/Size/Sch/Ht-Lot No) and any other details.
   3.13 All Relevant documents are prepared Dimensional Reports, Inspection reports,
           NDT Reports, Mfg. Test Certif.
   3.14 After the records are completed bends are offered to Client or Third Party agency for inspection.
   3.15 After Inspection, acceptance and final stamping by inspection agency. The item is released to            store.
   3.16 After getting the internal / shipping clearance note the Stores will pack the items with suitable            packing material, as Per spec, with packing lists, to avoid any kind of damage during Transit.