API 5L,ASTM A53, AS 1163, CSA Z245.1,EN 10219-1,EN 10217-1/2/4,EN 10225 HFW Pipe

High Frequency Electric Resistance Welded (HFW) Pipe

Strip is unwound from coils and side-trimmed to control width and condition the edges for welding. The strip then passes through a series of contoured rolls which progressively cold-form it into a circular shape. The edges are forced together under pressure and welded by heating the steel to temperatures between 2200° F and 2600° F using copper contacts or coil induction.

Weld flash is removed from the inside and outside surfaces of the newly-formed pipe, and the weld zone is heat treated to ensure homogeneity between the base metal and weld. The weld is subjected to in-line nondestructive testing, and the pipe then passes through a series of sizing rolls to attain its precise finished diameter. It is then straightened and cut to the desired finished length.

Reference Standards:

• Steel Pipe

• Line Pipe

API 5L PSL 1,2 & 3,ISO 3183-1,2 & 3, AS 1163,AS 2885.1,CSA Z245.1, DIN 17172, EN 10208-1,2 & 3, DNV OS-F101,EN10217-5

NACE MR 0175/ISO 15156-2,NACE TM 0177,NACE TM 0284

BS 3602-2, BS 6323-7,GOST 10704,IPS-M-PI-190, IGS-MS-PL-001,GOST 20295,GOST R52079,KOC-MP-019,KOC-MS-001,NFA 49-211,NFA 49-411, NRF-001-Pemex-2007

DEP 31.40.20.30 (Non-Sour),DEP 31.40.20.31 (Sour),DEP 31.40.20.35,DEP 31.40.20.37, DGS-9510-001, 01-SAMSS-035 and 01-SAMSS-038,TOTAL GS EP PLR 202,TOTAL-GS-PLR-212

• Structural Pipe

ASTM A252, EN 10219-1/2, AWWA C200, BS 3601-1, DIN 2460

API 2B, API 2H, API 2W

DIN 2470-1 & 2, DIN 17120, DIN 17174,

EN 10217-1/3 EN 10220, EN 10224,EN 10255, EN 10296-1

JIS G 3444, JIS G 3457, JIS 5525,KS D3566, AS 1579

• Process Pipe

ASTM A134,ASTM A139,ASTM A155, ASTM A671,ASTM A672,ASTM A691,ASME B31.1,ASME B31.3

• Coating

• 3 Layer Polyethylene Coating

CSA Z.245.21, DIN 30670,ISO 21809-1, NFA 49-710, AWWA C215

• 3 Layer Polypropylene Coating

DIN 30678, NFA 49-711

• Polyurethane Coating

CSA Z245.22, AWWA C222, EN 10290

• Fusion Bonded Epoxy (Single / Dual layer) Coating

CSA Z 245.20,API RP 5L7, ISO 12944,ISO 21809-2,AWWA C213, AS 3862,NACE SP394

• Internal Liquid Epoxy Coating

API RP5L 2, AWWA C210,EN10289, EN 10290, EN 10301,ISO 15741,NFA 49-709

• Concrete Weight Coating

ISO 21809-5, DNV-OS-F101

• Exterior Coal-Tar,Asphalt Enamel,Bitumen Coating

AWWA C203, BS 534

• Internal Cement Mortar or Cement Mortar Coating Additive

AWWA C205, DIN 2614, BS 534, EN 10298