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  • Users: metboss
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  1. metboss

    Welding Procedure Specification (WPS) for the base metal AISI 8630(weld overlay cladding

    Hi All, We have recently received a Welding Procedure Specification (WPS for Weld overlay cladding with Inconel: ERNiCRMO3) from our supplier indicating the base metal as AISI 8630 with a yield strength range of either 60 KSI or 80 KSI. However, the Procedure Qualification Record (PQR) is...
  2. metboss

    Welded v/s Single body Tubular Mandrels

    Hi All, We have ordered one Drilling Tool (Whipstock) which should be made of single piece Tubular mandrel. But supplier has come up with a deviation request that the supplied Tool will be of welded type instead of single body type due to concave curvature configuration & associated machining...
  3. metboss

    Low alloy steel welding with Carbon steel

    Hi all, We want to weld a Drilling tubular material with Vanes (rectangular shaped blades). Tubular material T-95 grade (API 5CT) of size 13” OD to be welded(fillet weld) with AISI 1040 carbon steel material of size 100 mm length x 15 mm thickness (rectangular bars). What should be pre-heat...
  4. metboss

    Repair WPS

    Hi All, We have one weld repair job and our contractor submitted the repair specific WPS. But, they submitted the original PQR which is applicable for production welding WPS. The details are as: Repair welding WPS (process SMAW and SAW) no PWHT, code ASME IX Production...
  5. metboss

    Fluorescent dye and Wetting agent for Hydro test medium (water)

    Hello, Our client specification calls for hydrotesting with water containing “client approved type/concentration of wetting agent” and fluorescent dye. As per my understanding, fluorescent dye is used to enhance the sensitivity of test as we utilize it in Dye penetrant examination(surface...
  6. metboss

    Material selection for H2S and CO2 application

    Dears, In our upstream application, one of the Gate Valve of Wellhead equipment is found to be leaking after 3 years in service. Upon retrieval and post disassembly inspection, it was observed that seat pocket area, and seat were corroded with a significant metal loss. Also, there is evidence...
  7. metboss

    API 17D Gate Valves

    Hi, We have placed the order for Sub-sea API 17D Gate Valves with API Monogram requirement. We are informed by the supplier that Gate Valve will be supplied as per API 6A design with Hydraulic Actuator (as per API 17D). However, this Gate Valve Assembly will not be monogrammed due to mix-up of...
  8. metboss

    Gate Valve Actuator Leak

    Hi All, “Our hydraulic actuator assembled Gate Valve” started leaking during operation. During the preliminary investigation, it was found that the maximum hydraulic oil working pressure for actuator is 3,000 psi whereas applied inlet pressure was 4,000 psi. However, after dismantling and...
  9. metboss

    NDT of Raw material

    Dear Experts, As per our project specification, prior to machining, our sub-contractor shall perform UT on raw forgings of size above 30" (Ref. Standard: API 6A/ASTM A388/ASTM E428). Now, sub-contractor is declining to perform UT on raw material as they are saying that reference standard...
  10. metboss

    Base metal compatibility V/s WPS

    Dear Experts, We have one weldment job and as per BOM, Main plate (AISI 4130 60 KSI) will be welded onto supporting Gusset plates (EN 10025 S335). Our our vendor has submitted WPS in which Base metals are: AISI 4130 7KSI X API 5L Gr. X65. Can we accept this WPS as per ASME IX...
  11. metboss

    API 6A hardness issue

    Dear Experts, We placed an order for Wellhead equipment (Material AISI 75 KSI, Design pressure/Working Pressure: 7,000 psi; Test Pressure: 10,000 psi, API 6A standard). As per API 6A standard "minimum hardness" for 75 KSI material is 197 BHN. But, during the raw material testing, hardness is...
  12. metboss

    API Q1 compliance QMS and API Q1 certification

    Hello everyone, What is the difference between “only API Q1 compliance QMS and API Q1 certification”? As per API 6A, in order obtain the monogram license, manufacturer/licensee shall have Quality Management System (QMS) compliance to API Q1 and shall meet all the API-specified requirements of...
  13. metboss

    AISI 4130 V/s API 5L X-60

    Dear All, We have some requirements for Welding connector (API 5L X-60 grade, 30" Wall thickness 1"). This connector will be welded to Conductor Pipe (API 5L X-52, 30" Wall thickness WT 1") at Drilling Rig site. But our suppliers are offering below material specs. for Welding connector...
  14. metboss

    PWHT Temperature

    Hi All, Please note that during PWHT (after cladding on Valve bore) monitoring process, it was observed that temperature was exceeded the required value i.e. Reqd. 600̊C whereas observed 780̊C. The soaking period was 4 Hrs. This discrepancy is mainly due to faulty control instrument and...
  15. metboss

    Hi All, During the hydro testin

    Hi All, During the hydro testing of Wellhead equipment ( 5,000 psi test pressure; code reference API 6A), pressure started dropping and observed a leak in one of the plugged port (threaded type). Upon visual inspection, a linear crack (1.5") was identified on an entire threaded area of port...
  16. metboss

    410 material in sea water appllication

    Hello, Our application is water injection well and we need to select the material for Wellhead equipment (API 6A). Can we use 13Cr (AISI 410) material in sea water application? We proposed 13Cr material; but our client says that 13Cr cannot be used due to NACE restrictions and potential...
  17. metboss

    AISI 4130 material with Weld overlay

    Hi All, Item: Gate Valve (4-1/8"); Applicable code: API 6A. Material: AISI 4130; Weld overlay: Inco 625 (3mm thickness) inside entire bore. During UT inspection, defect was found in weld metal and as a part of procedure, our vendor has brought this issue to our attention with their internal...
  18. metboss

    API 6A 21st edition

    Hi, We have placed the order for Wellhead equipment with API monogram (API 6A, 20th edition) in Oct 2019. Now, OEM has come up with clarification that equipment’s manufactured after Nov. 2019 will not be monogrammed as new API 6A 21st edition is in place. They are saying that there is a...
  19. metboss

    Impact of Mn on Steel

    Hi all, As per Mill MTC (material: Low Alloy steel AISI 4140), it’s been noted that Mn, Cr & MO contents are slightly exceeding the maximum permissible limits as set in applicable standard ASME IIA (Table 2). Test results in MTC - Mn: 1.10, Cr: 1.20 & Mo: 0.35 Max upper limit for AISI 4140 as...
  20. metboss

    3.2 certification of equipment

    Hi All, We have received the order from our client to supply Drilling (Wellhead) Equipment and the required certification is 3.2 and third party inspection (TPI: client appointed). But, our supplier/manufacturer is saying that they will use the “off the shelf raw material with EN 10204 3.1...

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