DIMENSIONAL TOLERANCE
flattening on any point max. 1.7% ovality within 1.5% of the dia. of pipe angle +/- 1.5^o 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

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.

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