{"id":385089,"date":"2024-10-20T03:29:02","date_gmt":"2024-10-20T03:29:02","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-en-10253-22021\/"},"modified":"2024-10-26T06:18:53","modified_gmt":"2024-10-26T06:18:53","slug":"bs-en-10253-22021","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-en-10253-22021\/","title":{"rendered":"BS EN 10253-2:2021"},"content":{"rendered":"

This document specifies the technical delivery requirements for seamless and welded butt?welding fittings (elbows, concentric and eccentric reducers, equal and reducing tees, caps) made of carbon and alloy steel in two test?categories which are intended for pressure purposes at room temperature, at low temperature or at elevated temperatures, and for the transmission and distribution of fluids and gases.<\/p>\n

It specifies:<\/p>\n

    \n
  1. \n

    type of fittings;<\/p>\n

      \n
    1. \n

      type A: Butt-welding fittings with reduced pressure factor;<\/p>\n<\/li>\n

    2. \n

      type B: Butt-welding fittings for use at full service pressure;<\/p>\n<\/li>\n<\/ol>\n<\/li>\n

    3. \n

      steel grades and their chemical compositions;<\/p>\n<\/li>\n

    4. \n

      mechanical properties;<\/p>\n<\/li>\n

    5. \n

      dimensions and tolerances;<\/p>\n<\/li>\n

    6. \n

      requirements for inspection and testing;<\/p>\n<\/li>\n

    7. \n

      inspection documents;<\/p>\n<\/li>\n

    8. \n

      marking;<\/p>\n<\/li>\n

    9. \n

      protection and packaging.<\/p>\n<\/li>\n<\/ol>\n

      \n
      \n NOTE\n <\/div>\n

      The selection of the appropriate fitting (material, thickness) is the ultimate responsibility of the manufacturer of the pressure equipment (see European Legislation for Pressure Equipment). In the case of a harmonized supporting standard for materials, presumption of conformity to the ESRs is limited to technical data of materials in the standard and does not presume adequacy of the material to a specific item of equipment. Consequently, it is essential that the technical data stated in the material standard be assessed against the design requirements of this specific item of equipment to verify that the ESRs of the PED are satisfied.<\/p>\n<\/div>\n

      PDF Catalog<\/h4>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
      PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
      2<\/td>\nundefined <\/td>\n<\/tr>\n
      13<\/td>\n1 Scope
      2 Normative references <\/td>\n<\/tr>\n
      17<\/td>\n3 Terms and definitions <\/td>\n<\/tr>\n
      18<\/td>\n4 Symbols and abbreviations <\/td>\n<\/tr>\n
      19<\/td>\n5 Classification and designation
      5.1 Classification of grades
      5.2 Designation of steel grades
      5.3 Designation of fittings
      5.3.1 General
      5.3.2 Elbows and return bends
      5.3.3 Reducers <\/td>\n<\/tr>\n
      20<\/td>\n5.3.4 Tees
      5.3.5 Caps
      6 Information to be supplied by the purchaser
      6.1 Mandatory information
      6.2 Options <\/td>\n<\/tr>\n
      22<\/td>\n6.3 Examples of an order
      6.3.1 Example 1
      6.3.2 Example 2
      6.3.3 Example 3
      6.3.4 Example 4
      6.3.5 Example 5 <\/td>\n<\/tr>\n
      23<\/td>\n7 Resistance to internal pressure
      7.1 General
      7.2 Fittings of type A
      7.3 Fittings of type B
      8 Manufacturing process
      8.1 Steelmaking process
      8.2 Product making process for fittings and heat treatment
      8.2.1 Product making process <\/td>\n<\/tr>\n
      24<\/td>\n8.2.2 Welding
      8.2.2.1 General <\/td>\n<\/tr>\n
      25<\/td>\n8.2.2.2 Welding as part of the manufacturing process of the fitting
      8.2.2.3 Finished weld requirement
      8.2.2.4 Heat treatment after welding
      8.2.3 Heat treatment condition <\/td>\n<\/tr>\n
      27<\/td>\n9 Technical requirements
      9.1 General
      9.2 Chemical composition
      9.2.1 Cast analysis
      9.2.2 Product analysis <\/td>\n<\/tr>\n
      31<\/td>\n9.3 Mechanical properties <\/td>\n<\/tr>\n
      38<\/td>\n9.4 Creep rupture strength values
      9.5 Weldability
      10 Appearance and internal soundness (delivery conditions)
      10.1 Definitions of surface imperfections <\/td>\n<\/tr>\n
      40<\/td>\n10.2 Appearance
      10.3 Internal soundness
      11 Dimensions and tolerances
      11.1 Dimensions
      11.1.1 General <\/td>\n<\/tr>\n
      41<\/td>\n11.1.2 Elbows
      11.1.3 Tees <\/td>\n<\/tr>\n
      42<\/td>\n11.1.4 Reducers <\/td>\n<\/tr>\n
      43<\/td>\n11.1.5 Caps
      11.1.6 Preferred diameters and wall thicknesses <\/td>\n<\/tr>\n
      45<\/td>\n11.2 Dimensional tolerances
      11.2.1 Diameter
      11.2.2 Out of roundness <\/td>\n<\/tr>\n
      46<\/td>\n11.2.3 Wall thickness tolerances
      11.2.4 Tolerances on specific dimensions and form <\/td>\n<\/tr>\n
      47<\/td>\n11.2.5 Corrugation <\/td>\n<\/tr>\n
      48<\/td>\n11.3 Performance of the end bevelling <\/td>\n<\/tr>\n
      49<\/td>\n12 Inspection
      12.1 Type of inspection
      12.2 Inspection documents
      12.2.1 Type of inspection documents
      12.2.2 Content of inspection documents <\/td>\n<\/tr>\n
      50<\/td>\n12.3 Summary of inspection and testing <\/td>\n<\/tr>\n
      52<\/td>\n13 Sampling
      13.1 Frequency of tests
      13.1.1 Test unit <\/td>\n<\/tr>\n
      53<\/td>\n13.1.2 Number of test pieces per test unit
      13.2 Preparation of samples and test pieces
      13.2.1 Samples for product analysis <\/td>\n<\/tr>\n
      54<\/td>\n13.2.2 Samples and test pieces for mechanical tests
      13.2.3 Test piece for the tensile test on the base material
      13.2.4 Test piece for the tensile test transverse to the weld
      13.2.5 Test piece for the weld bend test
      13.2.6 Test piece for the impact test <\/td>\n<\/tr>\n
      55<\/td>\n14 Test methods
      14.1 Chemical analysis
      14.2 Tensile test on the base material
      14.2.1 At room temperature
      14.2.2 At elevated temperature
      14.3 Transverse tensile test on the weld
      14.4 Hardness test <\/td>\n<\/tr>\n
      56<\/td>\n14.5 Weld bend test
      14.6 Impact testing <\/td>\n<\/tr>\n
      57<\/td>\n14.7 Dimensional testing
      14.8 Visual testing (VT)
      14.9 Non-destructive testing (NDT)
      14.9.1 Personnel
      14.9.2 NDT of the weld
      14.9.3 NDT of cold formed tees <\/td>\n<\/tr>\n
      58<\/td>\n14.9.4 NDT for the detection of laminar imperfections
      14.9.5 NDT for the detection of longitudinal imperfections
      14.9.6 NDT for the detection of transverse imperfections
      14.9.7 NDT of bars and forgings
      14.10 Positive material identification (PMI) <\/td>\n<\/tr>\n
      59<\/td>\n15 Marking <\/td>\n<\/tr>\n
      60<\/td>\n16 Protection and packaging <\/td>\n<\/tr>\n
      61<\/td>\nAnnex A (normative)Dimensions
      A.1 General
      A.2 Elbows <\/td>\n<\/tr>\n
      63<\/td>\nA.3 Tees <\/td>\n<\/tr>\n
      65<\/td>\nA.4 Reducers <\/td>\n<\/tr>\n
      67<\/td>\nA.5 Caps <\/td>\n<\/tr>\n
      69<\/td>\nAnnex B (normative)Determination of pressure factors and wall thickness
      B.1 General
      B.2 Symbols and units <\/td>\n<\/tr>\n
      72<\/td>\nB.3 Minimal and nominal wall thickness
      B.4 Pressure factors of fittings of type A
      B.4.1 General
      B.4.2 Pressure factor <\/td>\n<\/tr>\n
      73<\/td>\nB.4.3 Elbows
      B.4.4 Tees <\/td>\n<\/tr>\n
      76<\/td>\nB.4.5 Reducers <\/td>\n<\/tr>\n
      81<\/td>\nB.4.6 Caps <\/td>\n<\/tr>\n
      83<\/td>\nB.5 Wall thicknesses of fittings of type B
      B.5.1 General
      B.5.2 Elbows <\/td>\n<\/tr>\n
      84<\/td>\nB.5.3 Tees <\/td>\n<\/tr>\n
      87<\/td>\nB.5.4 Reducers <\/td>\n<\/tr>\n
      91<\/td>\nB.5.5 Caps <\/td>\n<\/tr>\n
      93<\/td>\nAnnex C (normative)Pressure factor tables for Fittings of type A
      C.1 General
      C.2 Elbows <\/td>\n<\/tr>\n
      96<\/td>\nC.3 Tees <\/td>\n<\/tr>\n
      103<\/td>\nC.4 Reducers <\/td>\n<\/tr>\n
      112<\/td>\nC.5 Caps <\/td>\n<\/tr>\n
      113<\/td>\nAnnex D (informative)Wall thickness tables for fittings of type B
      D.1 General
      D.2 Elbows <\/td>\n<\/tr>\n
      116<\/td>\nD.3 Tees <\/td>\n<\/tr>\n
      125<\/td>\nD.4 Reducers <\/td>\n<\/tr>\n
      140<\/td>\nD.5 Caps <\/td>\n<\/tr>\n
      141<\/td>\nAnnex E (informative)Recommended heat treatment temperatures <\/td>\n<\/tr>\n
      142<\/td>\nAnnex F (informative)Creep rupture strength values <\/td>\n<\/tr>\n
      147<\/td>\nAnnex ZA (informative)Relationship between this European Standard and the Essential Requirements of EU Directive 2014\/68\/EU <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

      Butt-welding pipe fittings – Non alloy and ferritic alloy steels with specific inspection requirements<\/b><\/p>\n\n\n\n\n
      Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
      BSI<\/b><\/a><\/td>\n2021<\/td>\n150<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":385096,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[350,2641],"product_tag":[],"class_list":{"0":"post-385089","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-23-040-40","7":"product_cat-bsi","9":"first","10":"instock","11":"sold-individually","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/385089","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/385096"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=385089"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=385089"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=385089"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}