管道焊接标准(中英文对照版)

(6mm)

或更大的范围的管道承压焊缝附近。管壁厚度低于

英寸（

6mm

）< /p>

时，焊工识别标记按

SECCO

检验人员 的决定，或用震动蚀刻方式标在管道上、或记在永

久书面记录上。另外每个焊缝应用一个 唯一的焊缝号（由单线图或系统被确认的）显示标

记以便于跟踪。焊缝号标记应取得批准 。

4.5.10

For

austenitic

steels,

high

alloy

steels

and

nonferrous

metals,

the

welder's

symbol

shall

be

applied

with

waterproof

paint

that

is

not harmful

or

detrimental

to

the

base

metal.

The

marking

medium

shall

be

free

of

sulfur

compounds,

lead

compounds,

aluminum pigments, vanadium compounds, metallic zinc and chlorides.

对奥氏体不锈钢、高合金钢和有色金属，焊工记号可以用对母材 无害或不能损伤母材的防

水漆。记号介质应无硫化物、石墨、铝颜料、铝化物、金属锌和 氯化银。

4.5.11

Alignment clamps shall be used for all butt-welds in thin wall piping materials. Thin

wall piping is defined as tubing or piping, up to and including Schedule 40. The use of

alignment clamps may be waived on a case by case basis, where the Supplier can

demonstrate to the satisfaction of SECCO’s Inspector, that equivalent quality weld fit

-

ups can be produced by other methods. Alignment tolerances shall be in accordance

with the relevant codes.

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SECCO Standard for Piping Welding

管道焊接标准

薄壁管道焊接时应采用 找正夹具。薄皮管指厚度等级为

40

的管道。当供货商能证明出 让

SECCO

检查人员满意时，那么找正夹具的使用可以被放弃 。假定其它方法可保证焊接质

量的话。找正允差应与标准规范相一致。

< br>

4.6

P

REHEAT AND

I

NTERPASS

T

EMPERATURE

预热和层间温度

4.6.1

Preheat and interpass temperatures shall be in accordance with the applicable codes.

The

preheat

requirement

is

also

applicable

to

thermal

gouging,

cutting

and

tack

welding.

预热和层间温度应符合适用规范。预热要求 也适用于热表面切割和定位焊。

4.6.2

The preheat temperature shall be measured at least three inches (75 mm) away from

the weld preparation.

预热温度至少 在距焊缝制备区

3

英寸（

75mm

）处测量。

4.6.3

Carbon steel shall be preheated to 200°

F (93°

C) minimum, when any of the following

conditions apply:

以下任何条件适用时碳钢最小预热温度为

2000F

93

℃）

Base metal thickness exceeds one inch (25 mm).

母材厚度超过

1

英 寸（

25mm

）

The material is highly restrained; for example, branch connections or major attachments.

材料是高限制的，例如支管连接或主要的附件。

The surface of the material is wet or damp within 3

距坡口

3

英寸（

75mm

）以内材料表面是湿的或潮湿的。

4.6.4

The maximum preheat and interpass temperature for carbon steel and low-alloy steel

shall be 600°

F (315°

C).

对于 碳钢和低合金钢而言，最大预热和层间温度为

6000F

（

315

℃）

4.6.5

The

maximum

interpass

temperature

for

austenitic

stainless

steel

and

nickel

based

alloys shall be 350°

F (175°

C).

对奥氏体不锈钢和镍基合金钢而言是

350°

F

（

175

℃）

4.6.6

Preheat

and

interpass

temperatures

shall

be

determined

by

temperature-indicating

crayons,

contact

pyrometers,

thermocouples,

or

other

equally

suitable

means.

Temperature-indicating

crayons

used

on

austenitic

stainless

steels

and

nickel-base

alloys shall not cause corrosive or other harmful effects to the base metal. They shall

not contain more than one percent by weight of total halogens or sulfur or 200 ppm by

weight of inorganic halogens. It is the Supplier's responsibility to determine suitable

brands and melting temperatures that may be used. This information shall be made

available to SECCO on request.

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SECCO Standard for Piping Welding

管道焊接标准

预热和层间温度由测温 笔测定，或用触点高温计，热电偶或其他手段。测温笔不得对奥氏

体不锈钢和镍基合金钢 产生影响母材性能的腐蚀或其它伤害。不能含有超过卤素或硫的总

量的

< br>1%

或无机卤素

200ppm

（ 按重量）应由供货商决定合适的品牌和熔化温度。该类信

息应按要求向

< br>SECCO

提供。

4.6.7

When the specified preheat temperature is 300°

F (150°

C) or higher, the metal shall

be

maintained

at

or

above

the

preheat

temperature

until

the

weld

is

completed.

If

welding is interrupted prior to that, the weld shall be covered with adequate insulating

material to ensure slow cooling. The partially completed weld shall be examined by

magnetic particle testing before welding is resumed.

当预热温度达到

300°

F

(150°

C)

或更高时，保持该温度或在其以 上直到焊接结束。如果焊

接提前中断，焊缝应用合适的保温材料保证缓冷。恢复焊接前部 分完成的焊缝用磁粉检

查。

4.6.8

The

welding

of

groove

welds

in

carbon

steel

(P-1)

and

low

alloy

steel

pipe

(P-3

through P-5B) with wall thickness 3/4 in. (19 mm) or greater, may only be interrupted

provided that a minimum of 3/8 in. (10 mm) of weld metal is deposited, or 25 percent

of the welding groove is filled, whichever is greater. If welding is interrupted prior to

that,

the

weld

shall

be

covered

with

adequate

insulating

material

to

ensure

slow

cooling. The partially completed weld shall be examined by magnetic particle testing

before resuming welding.

在壁厚为

3/4 in. (19 mm)

或高于

3/4 in. (19 mm)

的碳钢（

P-1

）和低合金钢管（

P -3~P-

5B

）上进行坡口焊接时，只有当

< br>3/8 in. (10 mm)

焊接金属已焊着、或

25%

的焊接坡口已

填充时才能中断焊接，两者中以较大值为准 。若此前中断焊接，焊缝应用合适的保温材料

保证缓冷。恢复焊接前部分完成的焊缝用磁 粉检查。

4.7

P

OST

W

ELD

H

EAT

T

REATMENT

(PWHT)

焊后热处理

4.7.1

In

addition

to

the

requirements

of

the

applicable

code,

the

final

post

weld

heat

treatment shall be as follows:

除适用的规范要求外，最终的焊后热处理按下述内容执行：

4.7.1.1

In

cases

where

PWHT

is

required

for

service

conditions,

this

will

be

indicated

in

the

SECCO's

Engineering

Standard

SD-00-TSC-PP-0001

Piping material.

如果工况要求进行焊后热 处理（

PWHT

），这将在

SECCO

的工程标准

SD-

00-TSC- PP-001-

管道材料中指明。

4.7.1.2

A continuous record of the temperature indicated by all thermocouples shall

be made on recorder charts. A copy of these charts shall be included in the

fabrication and test records furnished to SECCO.

所有热电偶的温度指示连续记录应用记录图表进行。该图表副本应 提供（包含

制作和试验记录）给

SECCO

。

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SECCO Standard for Piping Welding

管道焊接标准

4.7.1.3

Post

weld

heat

treatment

(time

and

temperature)

shall

be

considered

an

essential variable for P-3, P-4, P-5 and P-6 materials. A decrease in time

of more than 15 percent and/or temperature of 10 percent or more from the

range qualified shall require a separate procedure qualification record.

焊后热处理（时间和温度）是

P-3

、

P-4

、

P-5

和

P-6

材料的一个变量。时间减

少量如超过